OLRB Accredited Employers' Organizations

Below is an alphabetical listing of all accreditations granted since 1971 by the Ontario Labour Relations Board to employers' organizations in the construction industry as authorized by section 134 of the Labour Relations Act, 1995 or predecessor legislation. The system of accreditation was established by The Labour Relations Amendment Act, 1970 (No. 2), S.O. 1970, c.85, in force February 15, 1971. For OLRB Accreditation Certificates please contact the library owtl@wsiat.ca for copies.

Some Key Notes:

Decisions - When available, we provide a link to the full-text of the decision. When an electronic copy of the decision is not available / accessible we'll provide you with an OLRB Reports and / or Quicklaw cite. Note that reported versions are often abridged and, if so, are marked as such. Unabridged versions of these decisions and decisions marked "unreported" will be available only from the Library, to obtain access to these please contact us.
Dates - The date shown is the date of the OLRB decision in which the association was accredited. This sometimes differs slightly from the date on the certificate. If there is a discrepancy, then the date of the decision prevails.
Geographic areas are approximate, (except for province-wide accreditations). Consult the decision/certificate for exact descriptions.
Sectors - Section 126 (1) of the Labour Relations Act, 1995 defines "sector" as follows: "sector" means a division of the construction industry as determined by work characteristics and includes the industrial, commercial and institutional sector, the residential sector, the sewers and watermains sector, the roads sector, the heavy engineering sector, the pipeline sector and the electrical power systems sector. In this list "ICI" denotes the industrial, commercial and institutional sector. The sewers and watermains sector was originally referred to as the "sewers, tunnels and watermains sector". The word "tunnels" was removed by The Labour Relations Amendment Act, 1975, S.O. 1975, c.76 which came into force on July 18, 1975 . This amendment appears to have been precipitated by a debate over whether subway tunnels should fall into the heavy engineering sector or the sewers, tunnels and watermains sector (see The Heavy Construction Association of Toronto, [1973] OLRB Rep. May 245).

List of Accreditation Certificates and Decisions

Architectural Glass & Metal Contractors Association

Certificate / File No.: 6253-74-R Accreditation Certificate
Decision: Unreported decision of 6253-74-R
Date: January 27, 1976
Respondent: International Brotherhood of Painters and Allied Trades, Glaziers' Local Union 1819
Geographic Area: Board Area #8
Sector(s): Residential; ICI

Association Des Constructeurs De Murs Et Plafonds D'Ottawa

See: Walls and Ceilings Contractors Association of Ottawa

Association of Millwrighting Contractors of Ontario

Certificate / File No.: 2427-72-R Accreditation Certificate
Decision: [1973] OLRB Rep. October 545. (Abridged), Unreported decision of 2427-72-R
Date: October 24, 1973
Respondent: United Brotherhood of Carpenters and Joiners of America
Geographic Area: Province of Ontario
Sector(s): ICI

Boilermaker Contractors' Association of Ontario

Certificate / File No.: 3192-72-R Accreditation Certificate
Decision: Unreported decision of 3192-72-R
Date: February 13, 1974
Respondent: International Brotherhood of Boilermakers, Iron Ship Builders, Blacksmiths, Forgers and Helpers
Geographic Area: Province of Ontario
Sector(s): ICI; Residential; Sewers, tunnels and watermains; Heavy engineering

Canadian Automatic Sprinkler Association

Certificate / File No.: 4160-73-R Accreditation Certificate
Decision: Unreported decision of 4160-73-R
Date: March 14, 1974
Respondent: United Association of Journeymen and Apprentices of the Plumbing & Pipe Fitting Industry of the United States and Canada, Local Union 787
Geographic Area: Province of Ontario
Sector(s): ICI; Residential; Sewers, tunnels and watermains; Heavy engineering

Central Southwest Ontario Heavy Civil Construction Association

Certificate / File No.: 2335-18-R Accreditation Certificate
Decision: 2019 CanLII 26453 (ON LRB)
Date: March 29, 2019
Respondent: International Union of Operating Engineers Local 793
Geographic Area: Region of Waterloo and the Counties of Wellington, Brant, Norfolk, Dufferin and Grey, excluding the ICI sector
Sector(s): sewers and watermains sectors and roads sector

Central Southwest Ontario Heavy Civil Construction Association

Certificate / File No.: 2336-18-R Accreditation Certificate
Decision: 2019 CanLII 26452 (ON LRB)
Date: March 29, 2019
Respondent: Tri-Local Heavy Civil Construction Council
Geographic Area: Counties of Brant, Norfolk, Wellington, Dufferin, Grey and the Regional Municipality of Waterloo
Sector(s): road construction, sewer and watermain construction, structures, common excavation and building site preparation and work incidental thereto

Concrete Cutting & Drilling Association of Ontario

Certificate / File No.: 1468-23-R Accreditation Certificate
Decision: 2024 CanLII 24468 (ON LRB)
Date: March 7, 2024
Respondent: Labourers' International Union of North America, Ontario Provincial District Council and its affiliated Local Unions, 183, 493, 506, 527, 607, 625, 837, 1036, 1059 and 1089
Geographic Area: Province of Ontario
Sector(s): all sectors of the construction industry

Construction Builders Association of Durham

Certificate/File No.: 0266-15-R Accreditation Certificate
Decision: 2015 CanLII 49879 (ON LRB); amendment 2015 CanLII 52500 (ON LRB)
Date: August 7, 2015
Respondent: Allied Construction Employees Local 1030, UBCJA
Geographic Area: Board area #9
Sector(s): Residential

Durham Residential Construction Labour Bureau

Certificate/File No.: 2834-14-R Accreditation Certificate
Decision: 2015 CanLII 36089 (ON LRB)
Date: June 16, 2015
Respondent: Labourers’ International Union of North America, Local 183
Geographic Area: Board area #9
Sector(s): Residential (low-rise)

Durham Residential Construction Labour Bureau

Certificate / File No.: 0796-24-R Accreditation Certificate
Decision: 2024 CanLII 93102 (ON LRB)
Date: September 12, 2024
Respondent: Labourers' International Union of North America, Local 183
Geographic Area: OLRB Geographic Areas No. 9, 10, 11, 12, and 29
Sector(s): residential sector of the construction industry

Eastern Ontario Paint and Coatings Contractors' Association

Certificate / File No.: 0748-24-R Accreditation Certificate
Decision: 2024 CanLII 98804 (ON LRB)
Date: September 26, 2024
Respondent: Operative Plasterers' and Cement Masons' International Association of the United States and Canada, Local 124
Geographic Area: the County of Lanark, the geographic Townships of South Crosby, Bastard, Kitley, Wolford, Oxford (on Rideau) and South Gower and all lands north thereof in the United Counties of Leeds and Grenville, the County of Renfrew, and the City of Ottawa and the United Counties of Prescott and Russell
Sector(s): residential sector of the construction industry

Electrical Construction Association of Hamilton Inc.

Certificate / File No.: 1113-06-R Accreditation Certificate
Decision: Accreditation Decision [CanLII]
Date: October 20, 2006
Respondent: International Brotherhood of Electrical Workers, Local 105
Geographic Area: Board areas #4, 26 and parts of #3, 5
Sector(s): Residential

Electrical Contractors Association of Central Ontario

Certificate/File No.: 2459-10-R Accreditation Certificate
Decision: 2011 CanLII 12822 (ON LRB)
Date: March 15, 2011
Respondent: International Brotherhood of Electrical Workers, Local 804
Geographic Area: Board areas #6, 7, 27, 28 and part of 3
Sector(s): Residential

Electrical Contractors Association of London

Certificate / File No.: 3175-72-R Accreditation Certificate
Decision: Unreported decision of 3175-72-R
Date: March 20, 1974
Respondent: International Brotherhood of Electrical Workers, Local Union 120
Geographic Area: Counties of Oxford, Huron, Middlesex and Elgin
Sector(s): ICI; Residential

Electrical Contractors' Association of Ottawa

Certificate / File No.: 0282-88-R Accreditation Certificate
Decision: Accreditation Decision [CanLII]
Date: April 13, 1989
Respondent: International Brotherhood of Electrical Workers, Local Union 586
Geographic Area: Board area #15 and the County of Lanark
Sector(s): Residential

Electrical Contractors Association, Quinte-St. Lawrence

Certificate / File No.: 0701-75-R Accreditation Certificate
Decision: Unreported decision of 0701-75-R
Date: January 28, 1976
Respondent: International Brotherhood of Electrical Workers, Local Union 115
Geographic Area: Board areas #29 & 31 and parts of #12 & #13
Sector(s): ICI; Residential; Sewers and watermains; Roads; Heavy engineering; Pipeline

Electrical Contractors Association of Toronto

Certificate / File No.: 1469-71-R Accreditation Certificate
Decision: Unreported decision of 1469-71-R
Date: January 9, 1975
Respondent: International Brotherhood of Electrical Workers, Local Union 353
Geographic Area: Board area #8
Sector(s): ICI; Residential

Electrical Division of the Construction Association of Thunder Bay

Certificate / File No.: 3055-72-R Accreditation Certificate
Decision: Unreported decision of 3055-72-R
Date: November 22, 1973
Respondent: Local Union No. 339, International Brotherhood of Electrical Workers
Geographic Area: Board areas #22, 23, 24
Sector(s): ICI; Residential

Electrical Power Systems Construction Association

Certificate / File No.: 0515-07-R Accreditation Certificate
Decision: Accreditation Decision [CanLII]
Date: November 13, 2007
Respondent: United Association of Journeymen and Apprentices of the Plumbing and Pipe Fitting Industry of the United States and Canada
Geographic Area: Province of Ontario
Sector(s): Electrical power systems

Electrical Power Systems Construction Association

Certificate / File No.: 0516-07-R Accreditation Certificate
Decision: Accreditation Decision [CanLII]
Date: August 17, 2009
Respondent: Labourers' International Union of North America, Ontario Provincial District Council
Geographic Area: Province of Ontario with exceptions
Sector(s): Electrical power systems

Electrical Power Systems Construction Association

Certificate / File No.: 1284-09-R Accreditation Certificate
Decision: Accreditation Decision [CanLII]
Date: November 9, 2009
Respondent: International Brotherhood of Boilermakers, Iron Ship Builders, Blacksmiths, Forgers and Helpers
Geographic Area: Province of Ontario with exceptions
Sector(s): Electrical power systems

Electrical Power Systems Construction Association

Certificate / File No.: 1285-09-R Accreditation Certificate
Decision: Accreditation Decision [CanLII]
Date: November 9, 2009
Respondent: International Association of Bridge, Structural Ornamental and Reinforcing Iron Workers
Geographic Area: Province of Ontario with exceptions
Sector(s): Electrical power systems

Electrical Power Systems Construction Association

Certificate / File No.: 0120-16-R Accreditation Certificate
Decision: 2016 CanLII 79481 (ON LRB)
Date: November 10, 2016
Respondent: Carpenters District Council of Ontario (CDC), United Brotherhood of Carpenters and Joiners of America
Geographic Area: Province of Ontario with exceptions
Sector(s): Electrical power systems

Electrical Power Systems Construction Association

Certificate / File No.: 0125-16-R Accreditation Certificate
Decision: 2016 CanLII 79480 (ON LRB)
Date: November 10, 2016
Respondent: Millwright Regional Council of Ontario United Brotherhood of Carpenters and Joiners of America
Geographic Area: Province of Ontario with exceptions
Sector(s): Electrical power systems

Electrical Power Systems Construction Association

Certificate / File No.: 1785-16-R Accreditation Certificate
Decision: 2017 CanLII 8154 (ON LRB)
Date: February 10, 2017
Respondent: The Built-Up Roofers', Damp and Waterproofers' Section of the Ontario Sheet Metal Workers' Conference for Locals 30, 47, 235, 269, 397, 473, 504, 537, and 562
Geographic Area: Province of Ontario with exceptions
Sector(s): Electrical power systems

Electrical Power Systems Construction Association

Certificate / File No: 3189-17-R
Decision : 2018 CanLII 105326 (ON LRB)
Date : November 1, 2018
Respondent: International Brotherhood of Teamsters, and Aldershot Equipment Inc.
Geographic Area: Province of Ontario
Sector(s): electrical power systems

Electrical Power Systems Construction Association

Certificate / File No: 3187-17-R
Decision : 2018 CanLII 105931 (ON LRB)
Date : November 1, 2018
Respondent: International Union of Operating Engineers
Geographic Area: Province of Ontario
Sector(s): electrical power systems

Electrical Power Systems Construction Association

Certificate / File No: 0253-17-R
Decision : 2017 CanLII 71645 (ON LRB)
Date : October 20, 2017
Respondent: International Association of Heat and Frost Insulators and Allied Workers
Geographic Area: Province of Ontario
Sector(s): electrical power systems

Electrical Power Systems Construction Association

Certificate / File No: 0251-17-R
Decision : 2017 CanLII 71646 (ON LRB)
Date : October 20, 2017
Respondent: The Ontario Council of the International Union of Painters and Allied Trades
Geographic Area: Province of Ontario
Sector(s): electrical power systems

Electrical Power Systems Construction Association

Certificate / File No.: 1622-18-R Accreditation Certificate
Decision: 2019 CanLII 111777 (ON LRB)
Date: November 19, 2019
Respondent: The IBEW Electrical Power Council of Ontario representing the following affiliated Local Unions 105, 115, 120, 303, 353, 402, 530, 586, 773, 804, 1687
Geographic Area: Province of Ontario
Sector(s): all construction work in the electrical power systems sector with exemptions

Electrical Power Systems Construction Association

Certificate / File No.: 1830-18-R Accreditation Certificate
Decision: 2019 CanLII 122745 (ON LRB)
Date: December 16, 2019
Respondent: International Association of Bridge, Structural, Ornamental and Reinforcing Iron Workers on behalf of Reinforcing Rodmen
Geographic Area: Province of Ontario
Sector(s): construction work in the electrical power systems sector with exemptions

Electrical Power Systems Construction Association

Certificate / File No.: 0946-22-R Accreditation Certificate
Decision: 2022 CanLII 116901 (ON LRB)
Date: November 24, 2022
Respondent: Ontario Provincial Conference of the International Union of Bricklayers and Allied Craftworkers
Geographic Area: Province of Ontario
Sector(s): Electrical Power

Electrical Power Systems Construction Association

Certificate / File No.: 0947-22-R Accreditation Certificate
Decision: 2022 CanLII 116898 (ON LRB)
Date: November 24, 2022
Respondent: Operative Plasterers' and Cement Masons' International Association of the United States and Canada, Local 598
Geographic Area: Province of Ontario
Sector(s): Electrical Power Sector

Electrical Power Systems Construction Association

Certificate / File No.: 0948-22-R Accreditation Certificate
Decision: 2022 CanLII 116931 (ON LRB)
Date: November 24, 2022
Respondent: Operative Plasterers' and Cement Masons' International Association of the United States and Canada, Local 124
Geographic Area: Province of Ontario
Sector(s): Electrical Power Sector

Electrical Power Systems Construction Association

Certificate / File No.: 0949-22-R Accreditation Certificate
Decision: 2022 CanLII 116882 (ON LRB)
Date: November 24, 2022
Respondent: Brick and Allied Craft Union of Canada
Geographic Area: Province of Ontario
Sector(s): construction industry

Frame Carpentry Contractors Association

Certificate / File No.: 0432-21-R Accreditation Certificate
Decision: 2021 CanLII 94433 (ON LRB)
Date: September 23, 2021
Respondent: Allied Construction Employees, Local 1030 United Brotherhood of Carpenters and Joiners of America
Geographic Area: Province of Ontario
Sector(s): residential framing, roughing in, footings, and similar work

General Contractors' Section of the Toronto Construction Association

Certificate / File No.: 452-71-R Accreditation Certificate
Decision: [1971] OLRB Rep. November 719
Date: November 25, 1971
Respondent: International Association of Bridge, Structural and Ornamental Ironworkers, Local Union Number 721
Geographic Area: Board area #8
Sector(s): ICI; Heavy engineering

General Contractors' Section of the Toronto Construction Association

Certificate / File No.: 304-71-R Accreditation Certificate
Decision: [1972] OLRB Rep. January 1
Date: December 30, 1971
Respondent: Local 598 of the Operative Plasterers and Cement Masons International Association of the United States and Canada
Geographic Area: Board area #8
Sector(s): ICI

General Contractors' Section of the Toronto Construction Association

Certificate / File No.: 1322-71-R Accreditation Certificate
Decision: Unreported decision of 1322-71-R
Date: April 18, 1973
Respondent: Carpenters District Council of Toronto and Vicinity on Behalf of Locals 27, 666, 681, 1133, 1747, 1963, 3227, 3233 of the United Brotherhood of Carpenters and Joiners of America
Geographic Area: Board area #8
Sector(s): ICI

General Contractors' Section of the Toronto Construction Association

Certificate / File No.: 488-71-R Accreditation Certificate
Decision: [1973] OLRB Rep. August 446. (Abridged), Unreported decision of 488-71-R
Date: August 21, 1973
Respondent: International Union of Operating Engineers, Local Union #793
Geographic Area: Board area #8
Sector(s): ICI (with exceptions)

General Contractors' Section of the Toronto Construction Association

Certificate / File No.: 992-71-R Accreditation Certificate
Decision: [1975] OLRB Rep. February 134. (Abridged), Unreported decision of 992-71-R
Date: February 18, 1975
Respondent: Labourers' International Union of North America, Local 506
Geographic Area: Board area #8
Sector(s): ICI (with exceptions)

Greater Hamilton & Niagara Construction Association

Certificate / File No.: 0681-22-R Accreditation Certificate
Decision: 2022 CanLII 92678 (ON LRB)
Date: September 26, 2022
Respondent: Labourers' International Union of North America, Local 837
Geographic Area: Regional Municipality of Niagara and Haldimand County, and in the City of Hamilton, the City of Burlington, that portion of the geographic Township of Beverly annexed by North Dumfries Township and that portion of the Town of Milton within the geographic townships of Nassagaweya and Nelson
Sector(s): sewer and watermain, roads, and heavy engineering sectors of the construction industry

Greater Hamilton & Niagara Construction Association

Certificate / File No.: 1735-22-R Accreditation Certificate
Decision: 2023 CanLII 14962 (ON LRB)
Date: February 15, 2023
Respondent: International Union of Operating Engineers, Local 793
Geographic Area: Regional Municipality of Niagara and Haldimand County (OLRB Board Area 5), and in the City of Hamilton, the City of Burlington, that portion of the geographic Township of Beverly annexed by North Dumfries Township and that portion of the Town of Milton within the geographic townships of Nassagaweya and Nelson (OLRB Board Area 26)
Sector(s): sewer and watermain, roads, and heavy engineering sectors of the construction industry

Greater Toronto Electrical Contractors Association

Certificate / File No.: 0333-22-R Accreditation Certificate
Decision: 2022 CanLII 81919 (ON LRB)
Date: August 25, 2022
Respondent: International Brotherhood of Electrical Workers, Local 303
Geographic Area: Regional Municipality of Niagara and Haldimand County
Sector(s): residential sector of the construction industry

Greater Toronto Railing Association

Certificate / File No.: 2690-17-R
Decision: 2018 CanLII 38810 (ON LRB)
Date: April 27, 2018
Respondent: Labourers' International Union of North America, Local 183
Geographic Area: City of Toronto, the Regional Municipalities of Peel and York, the Towns of Oakville and Halton Hills and that portion of the Town of Milton within the geographic Townships of Esquesing and Trafalgar, and the Town of Ajax and the City of Pickering in the Regional Municipality of Durham; the Regional Municipality of Durham (except for the Town of Ajax and the City of Pickering), the geographic Township of Cavan in the County of Peterborough and the geographic Township of Manvers in the City of Kawartha Lakes; and the County of Simcoe and the District Municipality of Muskoka
Sector(s): low-rise and high-rise interior and exterior railing installation (excluding high-rise miscellaneous metals, high-rise exterior aluminum, and low-rise welded steel frames) in the residential sector of the construction industry

Greater Toronto Sewer and Watermain Contractors Association

Certificate / File No.: 1972-99-R Accreditation Certificate
Decision: Accreditation Decision [CanLII]
Date: December 13, 2002
Respondent: Teamsters' Local Union 230 and a Council of Trade Unions acting as the representative and agent of Teamsters' Local Union 230 and Universal Workers Union, L.I.U.N.A. Local 183
Geographic Area: Board area #8 and Simcoe County
Sector(s): Sewers and watermains (with exceptions)

Greater Toronto Sewer and Watermain Contractors Association

Certificate / File No.: 1974-99-R Accreditation Certificate
Decision: Accreditation Decision [CanLII]
Date: December 13, 2002
Respondent: Universal Workers Union, L.I.U.N.A. Local 183 and a Council of Trade Unions acting as the representative and agent of Teamsters' Local Union 230 and Universal Workers Union, L.I.U.N.A. Local 183
Geographic Area: Board area #8 and Simcoe County
Sector(s): Sewers and watermains (with exceptions)

Greater Toronto Sewer and Watermain Contractors Association

Certificate / File No.: 1975-99-R Accreditation Certificate
Decision: Accreditation Decision [CanLII]
Date: December 13, 2002
Respondent: International Union of Operating Engineers, Local 793
Geographic Area: Board area #8 and Simcoe County
Sector(s): Sewers and watermains (with exceptions)

Greater Toronto Sewer and Watermain Contractors Association

Certificate / File No.: 0487-21-R Accreditation Certificate
Decision: 2022 CanLII 33776 (ON LRB)
Date: April 20, 2022
Respondent: International Union of Operating Engineers, Local 793
Geographic Area: City of Toronto, the Regional Municipalities of Peel and York, the Towns of Oakville and Halton Hills and that portion of the Town of Milton within the geographic Townships of Esquesing and Trafalgar, and the Town of Ajax and the City of Pickering in the Regional Municipality of Durham (Board Area 8);the Regional Municipality of Durham (except for the Town of Ajax and the City of Pickering), the geographic Township of Cavan in the County of Peterborough and the geographic Township of Manvers in the City of Kawartha Lakes (Board Area 9); the Town of Cobourg, the Municipality of Port Hope, and the geographic Townships of Hope, Hamilton, Haldimand and Alnwick in the County of Northumberland (Board Area 10); the County of Peterborough (except for the geographic Township of Cavan), the City of Kawartha Lakes (except for the geographic Township of Manvers) and the County of Haliburton (Board Area 11); that part of Board Area 12 west of the Trent Severn Waterway; and the County of Simcoe and the District Municipality of Muskoka (Board Area 18)
Sector(s): sewers and watermains

Greater Toronto Sewer and Watermain Contractors Association

Certificate / File No.: 0360-21-R Accreditation Certificate
Decision: 2022 CanLII 38565 (ON LRB)
Date: May 5, 2022
Respondent: Labourers' International Union of North America, Local 183
Geographic Area: City of Toronto, the Regional Municipalities of Peel and York, the Towns of Oakville and Halton Hills and that portion of the Town of Milton within the geographic Townships of Esquesing and Trafalgar, and the Town of Ajax and the City of Pickering in the Regional Municipality of Durham (Board Area 8);the Regional Municipality of Durham (except for the Town of Ajax and the City of Pickering), the geographic Township of Cavan in the County of Peterborough and the geographic Township of Manvers in the City of Kawartha Lakes (Board Area 9); the Town of Cobourg, the Municipality of Port Hope, and the geographic Townships of Hope, Hamilton, Haldimand and Alnwick in the County of Northumberland (Board Area 10); the County of Peterborough (except for the geographic Township of Cavan), the City of Kawartha Lakes (except for the geographic Township of Manvers) and the County of Haliburton (Board Area 11); that part of Board Area 12 west of the Trent Severn Waterway; and the County of Simcoe and the District Municipality of Muskoka (Board Area 18).
Sector(s): sewer and watermain work

Hamilton and District Sheet Metal Contractors Inc.

Certificate / File No.: 384-71-R Accreditation Certificate
Decision: [1971] OLRB Rep. September 562
Date: September 9, 1971
Respondent: Sheet Metal Workers' International Association Local Union 537 Hamilton Ontario Branch
Geographic Area: Board area #26 and parts of #5 & #8
Sector(s): ICI

Hamilton and District Sheet Metal Contractors Inc.

Certificate / File No.: 0176-75-R Accreditation Certificate
Decision: [1976] OLRB Rep. January 984 - Amendment
Date: August 29, 1975 - Amended January 15, 1976
Respondent: Sheet Metal Workers' International Association Amended, Local Union 537 Hamilton Ontario Branch
Geographic Area: Parts of Board areas #5, 8, 26
Sector(s): Electrical Power Systems

Heavy Construction Association of Toronto

Certificate / File No.: 1516-71-R Accreditation Certificate
Decision: [1973] OLRB Rep. May 245. (Abridged) Unreported decision 15-17-R
Date: May 16, 1973
Respondent: Labourers' International Union of North America, Local 183
Geographic Area: Board area #8
Sector(s): Heavy engineering

Heavy Construction Association of Windsor

Certificate/File No.: 2130-11-R Accreditation Certificate
Decision: 2013 CanLII 38642 (ON LRB)
Date: June 20, 2013
Respondent: International Union of Operating Engineers, Local 793
Geographic Area: Counties of Essex and Kent
Sector(s): Heavy engineering, sewers and watermains and roads

Heavy Construction Association of Windsor

Certificate/File No.: 2131-11-R Accreditation Certificate
Decision: 2013 CanLII 36514 (ON LRB)
Date: June 18, 2013
Respondent: Labourers' International Union of North America, Ontario Provincial District Council, Local 625
Geographic Area: Counties of Essex and Kent with exceptions
Sector(s): Heavy engineering, sewer and watermain and roads sectors with exceptions

Independent Plumbing & Heating Contractors Association

Certificate / File No.: 2211-86-R Accreditation Certificate
Decision: Accreditation Decision [CanLII]
Date: May 6, 1987
Respondent: United Association of Journeymen and Apprentices of the Plumbing and Pipefitting Industry of the United States and Canada, Local 46
Geographic Area: Board area #8
Sector(s): Residential (low rise)

Interior Systems Contractors Association of Ontario

Certificate / File No.: 1277-83-R Accreditation Certificate
Decision: Accreditation Decision [CanLII]
Date: April 27, 1984
Respondent: Drywall Acoustic Lathing and Insulation Local 675 of the United Brotherhood of Carpenters and Joiners of America
Geographic Area: Province of Ontario
Sector(s): Residential

Interior Systems Contractors Association of Ontario

Certificate / File No.: 1429-84-R Accreditation Certificate
Decision: Unreported decision of 1429-84-R
Date: February 10, 1987
Respondent: International Brotherhood of Painters and Allied Trades and Ontario Council of the International national Brotherhood of Painters and Allied Trades -- Local Union 1891
Geographic Area: Province of Ontario
Sector(s): Residential

Kitchener-Waterloo Construction Association

Certificate / File No.: 2865-72-R Accreditation Certificate
Decision: [1974] OLRB Rep. March 139. (Abridged), Unreported decision of 2865-72-R
Date: March 11, 1974
Respondent: Labourers' International Union of North America, Local 1081
Geographic Area: Board areas #4, 6, 7, 27, 28
Sector(s): ICI

Kitchener-Waterloo Construction Association

Certificate / File No.: 2866-72-R Accreditation Certificate
Decision: Unreported decision of 2866-72-R
Date: May 21, 1974
Respondent: Grand River Valley District Council of the United Brotherhood of Carpenters and Joiners of America on behalf of Local Unions 498, 949, 1940 and 2173
Geographic Area: Board areas #4, 6, 7, 27, 28
Sector(s): ICI

London Sewer and Watermain, Curb, Gutter and Sidewalk Contractors Association

Certificate / File No.: 2155-15-R Accreditation Certificate
Decision: 2016 CanLII 74662 (ON LRB)
Date: October 21, 2016
Respondent: Labourers' International Union of North America, Local 1059
Geographic Area: Counties of Middlesex, Bruce, Elgin, Oxford, Perth and Huron in the Province of Ontario
Sector(s): sewers and watermains sector of the construction industry; curb, gutter and sidewalk construction in the roads and heavy engineering sectors of the construction industry

London Sewer and Watermain, Curb, Gutter and Sidewalk Contractors Association

Certificate / File No.: 2156-15-R Accreditation Certificate
Decision: 2016 CanLII 74663 (ON LRB)
Date: October 21, 2016
Respondent: International Union of Operating Engineers, Local 793
Geographic Area: Counties of Middlesex, Bruce, Elgin, Oxford, Perth and Huron in the Province of Ontario
Sector(s): sewers and watermains sector of the construction industry; curb, gutter and sidewalk construction in the roads and heavy engineering sectors of the construction industry

London Sheet Metal Contractors Association

Certificate / File No.: 3407-72-R Accreditation Certificate
Decision: Unreported decision of 3407-72-R
Date: January 28, 1974
Respondent: Sheet Metal Workers' International Association, Local Union 473
Geographic Area: Board area #3, with exceptions
Sector(s): ICI; Residential

Masonry Contractors' Association of Toronto

Certificate / File No: 1640-18-R
Decision : 2019 CanLII 18030 (ON LRB)
Date : March 5, 2019
Respondent : Masonry Council of Unions Toronto and Vicinity, on behalf of its members, Bricklayers, Masons Independent Union of Canada, Local 1 and Labourers' International Union of North America, Local 183
Geographic Area: Provice of Ontario with exceptions
Secteur(s) : the construction industry, except ICI

Mechanical Contractors Association Hamilton

Certificate / File No.: 1189-71-R Accreditation Certificate
Decision: [1972] OLRB Rep. November 923. (Abridged), Unreported decision of 1189-71-R
Date: November 2, 1972
Respondent: United Association of Journeymen and Ap- prentices of the Plumbing and Pipe Fitting Industry of the United States and Canada, Local Union 67
Geographic Area: Board area #26, part of #5
Sector(s): ICI; Residential

Mechanical Contractors Association, Kingston

Certificate / File No.: 3174-72-R Accreditation Certificate
Decision: Unreported decision of 3174-72-R
Date: December 4, 1973
Respondent: Local Union 221 of the United Association of Journeymen and Apprentices of the Plumbing and Pipefitting Industry of the United States and Canada
Geographic Area: Board area #29, part of #13
Sector(s): ICI; Residential

Mechanical Contractors Association, Kingston

Certificate / File No.: 6658-74-R Accreditation Certificate
Decision: Unreported decision of 6658-74-R
Date: May 22, 1975
Respondent: Sheet Metal Workers International Association, A.F.L.-C.I.O.-C.L.C., Local Union No. 269
Geographic Area: Board area #29, parts of #12 & #13
Sector(s): ICI; Residential

Mechanical Contractors Association of London

Certificate / File No.: 2776-72-R Accreditation Certificate
Decision: Unreported decision of 2776-72-R
Date: April 27, 1973
Respondent: United Association of Journeymen and Ap- prentices of the Plumbing and Pipe Fitting In- dustry of the United States and Canada Local 593
Geographic Area: Board area #3, except Bruce County
Sector(s): ICI

Mechanical Contractors Association Niagara

Certificate / File No.: 3210-72-R Accreditation Certificate
Decision: [1973] OLRB Rep. September 477. (Abridged), Unreported decision of 3210-72-R
Date: September 18, 1973
Respondent: United Association of Journeymen and Apprentices of the Plumbing and Pipefitting Industry of the United States and Canada, Local Union 666
Geographic Area: Part of board area #5
Sector(s): ICI; Residential

Mechanical Contractors Association Niagara

Certificate / File No.: 7347-74-R Accreditation Certificate
Decision: Unreported decision of 7347-74-R
Date: May 12, 1977
Respondent: Sheet Metal Workers International Asso- ciation Local Union 537 Peninsula Branch
Geographic Area: Part of board area #5
Sector(s): ICI; Residential

Mechanical Contractors Association Ontario

Certificate / File No.: 3744-08-R Accreditation Certificate
Decision: Accreditation Decision [CanLII]
Date: August 10, 2009
Respondent: United Association of Journeymen and Apprentices of the Plumbing and Pipefitting Industry of the United States and Canada, and Ontario Pipe Trades Council, and United Association Locals 46, 67, 71, 221, 463, 508, 527, 552, 593, 599, 628, 663, 666 and 800
Geographic Area: Province of Ontario with exceptions
Sector(s): Electrical power systems with exceptions

Mechanical Contractors Association of Ottawa

Certificate / File No.: 1635-71-R Accreditation Certificate
Decision: [1973] OLRB Rep. February 99. (Abridged), Unreported decision of 1635-71-R
Date: February 16, 1973
Respondent: Sheet Metal Workers' International Association, Local Union 47
Geographic Area: Board areas #13, 14, 15, 31 and parts of #30 and of the District of Nipissing
Sector(s): Residential

Mechanical Contractors Association of Ottawa

Certificate / File No.: 1637-71-R Accreditation Certificate
Decision: [1973] OLRB Rep. February 99. (Abridged), Unreported decision of 1637-71-R
Date: February 16, 1973
Respondent: Sheet Metal Workers' International Assoc- ation, Local Union 47
Geographic Area: Board areas #13, 14, 15, 31 and parts of #30 and of the District of Nipissing
Sector(s): ICI

Mechanical Contractors Association of Ottawa

Certificate / File No.: 1636-71-R Accreditation Certificate
Decision: Unreported decision of 1636-71-R
Date: February 22, 1973
Respondent: United Association of Journeymen and Apprentices of the Plumbing and Pipefitting Industry of the United States and Canada, Local Union 71
Geographic Area: Board area #15 and the County of Lanark
Sector(s): Residential

Mechanical Contractors Association of Ottawa

Certificate / File No.: 1638-71-R Accreditation Certificate
Decision: Unreported decision of 1638-71-R
Date: February 22, 1973
Respondent: United Association of Journeymen and Apprentices of the Plumbing and Pipefitting Industry of the United States and Canada, Local Union 71
Geographic Area: Board area #15 and the County of Lanark
Sector(s): ICI

Mechanical Contractors Association of Thunder Bay

Certificate / File No.: 2764-72-R Accreditation Certificate
Decision: Unreported decision of 2764-72-R
Date: April 26, 1973
Respondent: United Association of Journeymen & Apprentices tices of the Plumbing & Pipefitting Industry of the United States & Canada, Local Union 628
Geographic Area: Board areas # 22, 23, 24, 25 and parts of #21 and 17
Sector(s): ICI; Residential

Mechanical Contractors Association of Toronto

Certificate / File No.: 1345-71-R Accreditation Certificate
Decision: [1973] OLRB Rep. January 22. (Abridged), Unreported decision of 1345-71-R
Date: January 9, 1973
Respondent: Local 46, The United Association of Journeymen men and Apprentices of the Plumbing and Pipe Fitting Industry of the United States and Canada
Geographic Area: Board areas #8, 27
Sector(s): ICI

Mechanical Contractors Association of Windsor

Certificate / File No.: 1623-71-R Accreditation Certificate
Decision: Unreported decision 1623-72-R
Date: March 23, 1973
Respondent: Local 552, of the United Association of Journeymen and Apprentices of the Plumbing and Pipefitting Industry of the United States and Canada
Geographic Area: Board area #1
Sector(s): ICI; Residential

Mechanical Contractors Association Zone 10

Certificate / File No.: 0792-75-R Accreditation Certificate
Decision: Unreported decision of 0792-75-R
Date: February 5, 1976
Respondent: United Association of Journeymen and Apprentices of the Plumbing and Pipe Fitting Industry of the United States and Canada, Local 599
Geographic Area: Board area #18 and part of the District of Parry Sound
Sector(s): ICI; Residential

Metropolitan Plumbing and Heating Contractors Association, A Division of the Mechanical Contractors Association Toronto

Certificate / File No.: 1339-71-R Accreditation Certificate
Decision: A) [1973] OLRB Rep. April 199. (Abridged); B) Amendment - Accreditation Decision, 1987 [CanLII]
Date: April 4, 1973 - Amended May 6, 1987
Respondent: The United Association of Journeymen and Apprentices of the Plumbing and Pipe Fitting Industry of the United States and Canada, Local 46 (Residential Division)
Geographic Area: Board areas #8 and 27
Sector(s): Residential. (Low-rise excluded, May 6/87)

Metropolitan Toronto Apartment Builders Association

Certificate / File No.: 0832-00-R Accreditation Certificate
Decision: [2001] O.L.R.D. No. 220 online: QL (OLRD)
Date: January 22, 2001
Respondent: Universal Workers' Union, Labourers' International Union of North America, Local 183
Geographic Area: Board area #8 and the County of Simcoe
Sector(s): Residential

Metropolitan Toronto Apartment Builders Association

Certificate / File No.: 0781-24-R Accreditation Certificate
Decision: 2024 CanLII 87635 (ON LRB)
Date: August 28, 2024
Respondent: Labourers’ International Union of North America, Local 183
Geographic Area: OLRB Areas Nos. 7, 8, 9, 10, 11, 12, 18 and 27
Sector(s): on-site construction of all types of apartment buildings only and their amenities, up to the takeover of the said construction project or part thereof by maintenance and management employees of the Employer or maintenance and management employees of some other employer

Metropolitan Toronto Residential Painting Contractors Association

Certificate / File No.: 0415-79-R Accreditation Certificate
Decision: Unreported decision of 0415-79-R
Date: February 19, 1981
Respondent: Local 1891 of the Ontario Council of the International national Brotherhood of Painters and Allied Trades
Geographic Area: Board area #8
Sector(s): Residential

Metropolitan Toronto Road Builders Association

See: Toronto and Area Road Builders Association

Metropolitan Toronto Sewer and Watermain Contractors Association

Certificate / File No.: 1533-88-R Accreditation Certificate
Decision: A) [1989] O.L.R.D. No. 2064 online:QL (OLRD); B) Amendment - Accreditation Decision, 1989 [CanLII]
Date: November 3, 1989 - Amended, December 19, 1989
Respondent: International Union of Operating Engineers, Amended, Local 793
Geographic Area: Board area #8 and Simcoe County
Sector(s): Sewers and watermains, with exceptions

Metropolitan Toronto Sewer and Watermain Contractors Association

Certificate / File No.: 1534-88-R Accreditation Certificate
Decision: A) [1989] O.L.R.D. No. 2064 online:QL (OLRD); B) Amendment - Accreditation Decision, 1989 [CanLII]
Date: November 3, 1989 - Amended, December 19, 1989
Respondent: Teamsters Local Union 230
Geographic Area: Board area #8 and Simcoe County
Sector(s): Sewers and watermains, with exceptions

Metropolitan Toronto Sewer and Watermain Contractors Association

Certificate / File No.: 1535-88-R Accreditation Certificate
Decision: A) [1989] O.L.R.D. No. 2064 online:QL (OLRD); B) Amendment - Accreditation Decision, 1989 [CanLII]
Date: November 3, 1989 - Amended, December 19, 1989
Respondent: Labourers' International Union of North Amended, America, Local 183
Geographic Area: Board area #8 and Simcoe County
Sector(s): Sewers and watermains, with exceptions

National Capital Road Builders Association

Certificate / File No.: 2263-86-R Accreditation Certificate
Decision: Accreditation Decision [CanLII]
Date: January 17, 1989
Respondent: International Union of Operating Engineers, Local 793; International Brotherhood of Teamsters Union, Local 91
Geographic Area: Board area #15
Sector(s): Roads; sewers and watermains; heavy engineering

National Capital Roadbuilders Association

Certificate / File No.: 2153-87-R Accreditation Certificate
Decision: Accreditation Decision [CanLII]
Date: October 6, 1988
Respondent: Labourers International Union of North America, Local 527
Geographic Area: Board area #15
Sector(s): Roads; sewers and watermains; heavy engineering

NDT Management Association
[Note: NDT=Non-Destructive Testing]

Certificate / File No.: 0473-82-R Accreditation Certificate
Decision: Accreditation Decision [CanLII]
Date: January 26, 1983
Respondent: Quality Control Council of Canada. [Note: This is a council of trade unions made up of the United Association of Journeymen and Apprentices of the Plumbing and Pipe Fitting Industry of the United States and Canada, and the International Brotherhood of Boilermakers, Iron Ship Builders, Blacksmiths, Forgers and Helpers]
Geographic Area: Province of Ontario
Sector(s): ICI; sewers and watermains; roads; heavy engineering; pipelines; electrical power systems

Ontario Concrete & Drain Contractors Association

Certificate / File No.: 2019-99-R Accreditation Certificate
Decision: Accreditation Decision [CanLII]
Date: December 13, 2002 - Effective Date, December 31, 2002 - Decision Date
Respondent: Universal Workers Union, L.I.U.N.A. Local 183
Geographic Area: Board area #8 and Simcoe County
Sector(s): All sectors save and except ICI

Ontario Concrete and Drain Contractors Association

Certificate / File No.: 1239-21-R Accreditation Certificate
Decision: 2022 CanLII 20290 (ON LRB) ; Amendment 2022 CanLII 22923 (ON LRB)
Date: March 7, 2022
Respondent: Labourers' International Union of North America, Local 183
Geographic Area: City of Toronto, the Regional Municipalities of Peel and York, the Towns of Oakville and Halton Hills and that portion of the Town of Milton within the geographic Townships of Esquesing and Trafalgar, and the Town of Ajax and the City of Pickering in the Regional Municipality of Durham, the Regional Municipality of Durham (except for the Town of Ajax and the City of Pickering), the geographic Township of Cavan in the County of Peterborough and the geographic Township of Manvers in the City of Kawartha Lakes, the Town of Cobourg, the Municipality of Port Hope, and the geographic Townships of Hope, Hamilton, Haldimand and Alnwick in the County of Northumberland, the County of Simcoe and the District Municipality of Muskoka
Sector(s): all concrete and drain work, in all sectors of the construction industry with exemptions

Ontario Erectors Association

Certificate / File No.: 2138-72-R Accreditation Certificate
Decision: Unreported decision of 2138-72-R
Date: May 31, 1974
Respondent: The International Association of Bridge, Structural and Ornamental Ironworkers, Local Union 700
Geographic Area: Counties of Elgin, Essex, Kent, Lambton and Middlesex
Sector(s): ICI; Heavy engineering

Ontario Erectors Association

Certificate / File No.: 2139-72-R Accreditation Certificate
Decision: Unreported decision of 2139-72-R
Date: June 17, 1974
Respondent: The International Association of Bridge, Structural and Ornamental Ironworkers, Local Union 721
Geographic Area: Board areas #9, 10, 11, 18, 27 and parts of areas #8 and 12
Sector(s): ICI; Heavy engineering

Ontario Erectors Association

Certificate / File No.: 2140-72-R Accreditation Certificate
Decision: Unreported decision of 2140-72-R
Date: May 29, 1974
Respondent: The International Association of Bridge, Structural and Ornamental Ironworkers, Local Union 736
Geographic Area: Board areas #4, 6, 7, 28 and parts of areas #3, 5, 26
Sector(s): ICI; Heavy engineering

Ontario Erectors Association

Certificate / File No.: 2141-72-R Accreditation Certificate
Decision: Unreported decision of 2141-72-R
Date: June 5, 1974
Respondent: The International Association of Bridge, Structural and Ornamental Ironworkers, Local Union 765
Geographic Area: Board areas #14, 15, 29, 30, 31 and part of area #12
Sector(s): ICI; Heavy engineering

Ontario Erectors Association

Certificate / File No.: 2142-72-R Accreditation Certificate
Decision: Unreported decision of 2142-72-R
Date: June 12, 1974
Respondent: The International Association of Bridge, Structural and Ornamental Ironworkers, Local Union 786
Geographic Area: Districts of Algoma, Manitoulin, Nipissing, Parry Sound, Sudbury, Temiskaming, and all of the District of Cochrane, south of the 50th degree latitude
Sector(s): ICI; Heavy engineering

Ontario Erectors Association

Certificate / File No.: 0923-77-R Accreditation Certificate
Decision: Unreported decision of 0923-77-R
Date: January 16, 1978
Respondent: International Association of Bridge, Structural and Ornamental Ironworkers, Local Union 759
Geographic Area: Board areas #22, 23, 24, 25
Sector(s): ICI; Heavy engineering

Ontario Formwork Association

Certificate / File No.: 0848-07-R Accreditation Certificate
Decision: Accreditation Decision [CanLII]
Date: March 6, 2008
Respondent: Formwork Council of Ontario
Geographic Area: Province of Ontario
Sector(s): ICI; Residential

Ontario Precast Concrete Manufacturers' Association, Erectors Division

Certificate / File No.: 1246-71-R Accreditation Certificate
Decision: [1975] OLRB Rep. March 171. (Abridged), Unreported decision of 1246-71-R
Date: March 7, 1975
Respondent: Labourers' International Union of North America, Local 506 and Labourers' International Union of North America, Ontario Provincial Council
Geographic Area: Province of Ontario
Sector(s): ICI; Residential; Sewers, tunnels and watermains; Roads; Heavy engineering

Ontario Railroad Contractors Association

Certificate / File No.: 0416-18-R
Decision: 2019 CanLII 14441 (ON LRB)
Date: February 21, 2019
Respondent: Labourers International Union of North America, Ontario Provincial District Council, Locals 183, 493, 527, 607, 625, 837, 1036, 1059 & 1089
Geographic Area: Province of Ontario
Sector(s): construction industry except ICI

Ontario Refrigeration and Air Conditioning Contractors Association

Certificate / File No.: 0114-05-R Accreditation Certificate
Decision: Accreditation Decision [CanLII]
Date: November 8, 2005
Respondent: United Association of Journeymen and Apprentices of the Plumbing and Pipe Fitting Industry of the United States and Canada, Local 787
Geographic Area: Province of Ontario
Sector(s): All sectors except ICI and electrical power systems sectors

Ontario Traffic Control Contractors' Association

Certificate / File No.: 1441-19-R Accreditation Certificate
Decision: 2020 CanLII 20443 (ON LRB); amendment 2020 CanLII 24414 (ON LRB)
Date: March 12, 2020
Respondent: Labourers' International Union of North America, Ontario Provincial District Council and its affiliated Local Unions, 183, 493, 527, 607, 625, 837, 1036, 1059 and 1089 Geographic Area: Province of Ontario
Sector(s): ICI (with exceptions)

Pipe Line Contractors Association of Canada

Certificate / File No.: 1049-71-R Accreditation Certificate
Decision: Unreported decision of 1049-71-R
Date: August 10, 1972
Respondent: International Union of Operating Engineers, Local 793
Geographic Area: Province of Ontario
Sector(s): Pipelines

Pipe Line Contractors Association of Canada

Certificate / File No.: 1050-71-R Accreditation Certificate
Decision: Unreported decision of 1050-71-R
Date: August 10, 1972
Respondent: International Brotherhood of Teamsters, Chauffeurs, Warehousemen & Helpers of America on Behalf of Locals 91, 141, 230, 879, 880, 990, 989
Geographic Area: Province of Ontario
Sector(s): Pipelines

Pipe Line Contractors Association of Canada

Certificate / File No.: 1051-71-R Accreditation Certificate
Decision: Unreported decision of 1051-71-R
Date: August 10, 1972
Respondent: Labourers' International Union of North America, Ontario Provincial District Council
Geographic Area: Province of Ontario
Sector(s): Pipelines

Pipe Line Contractors Association of Canada

Certificate / File No.: 1052-71-R Accreditation Certificate
Decision: Unreported decision of 1052-71-R
Date: August 10, 1972
Respondent: United Association of Journeymen & Apprentices of the Plumbing & Pipe Fitting Industry of the United States & Canada, and its Locals 46, 628, 663 and 254
Geographic Area: Province of Ontario
Sector(s): Pipelines

Residential Floor Levelling Association

Certificate / File No.: 1079-23-R Accreditation Certificate
Decision: 2023 CanLII 112329 (ON LRB)
Date: November 8, 2023
Respondent: Labourers' International Union of North America, Local 183
Geographic Area: all employers of employees engaged in the application of self-levelling underlayment, including the preparation of all types of floors for the application of flooring material on pre-poured concrete, for whom Labourers' International Union of North America, Local 183 holds bargaining rights in all sectors of the construction industry, save and except, the industrial, commercial and institutional sector in the City of Toronto, the Regional Municipalities of Peel and York, the Towns of Oakville and Halton Hills and that portion of the Town of Milton within the geographic Townships of Esquesing and Trafalgar, and the Town of Ajax and the City of Pickering in the Regional Municipality of Durham, the Regional Municipality of Durham (except for the Town of Ajax and the City of Pickering), the geographic Township of Cavan in the County of Peterborough and the geographic Township of Manvers in the City of Kawartha Lakes and Simcoe County.
Sector(s): self-levelling underlayment, including the preparation of all types of floors for the application of flooring material on pre-poured concrete

Residential Framing Contractors Association of Metro Toronto & Vicinity Inc.

Certificate / File No.: 2530-03-R Accreditation Certificate
Decision: Accreditation Decision [CanLII]
Date: May 26, 2004
Respondent: Universal Workers Union, LIUNA Local 183
Geographic Area: Board areas #8, 9 and Simcoe County
Sector(s): Residential

Residential Framing Contractors Association of Metropolitan Toronto & Vicinity Inc.

Certificate / File No.: 0502-23-R Accreditation Certificate
Decision: 2023 CanLII 78912 (ON LRB)
Date: August 17, 2023
Respondent: Labourers' International Union of North America, Local 183
Geographic Area: Ontario Labour Relations Board Areas 7, 8, 9, 10, 11, 12, 18, 27 and 29
Sector(s): residential sector of the construction industry

Residential Heating Ventilation Contractors Association

Certificate/File No.: 1795-11-R Accreditation Certificate
Decision: 2012 CanLII 21228 (ON LRB)
Date: April 18, 2012
Respondent: Sheet Metal Workers’ International Association, Local Union No. 285
Geographic Area: Board areas #6, 7, 9, 18, 26
Sector(s): Residential

Residential Low Rise Forming Contractors Association of Metropolitan Toronto and Vicinity

Certificate / File No.: 1336-95-R Accreditation Certificate
Decision: [1996] O.L.R.D. No. 3327 online:QL (OLRD)
Date: September 18, 1996
Respondent: Labourers' International Union of North America, Local 183
Geographic Area: Board area #8 and the County of Simcoe
Sector(s): Residential

Residential Low Rise Forming Contractors Association of Metropolitan Toronto and Vicinity

Certificate / File No.: 2176-19-R Accreditation Certificate
Decision: 2020 CanLII 36619 (ON LRB) Date: May 19, 2020
Respondent: Labourers' International Union of North America, Local 183
Geographic Area: Board Area Nos. 8, 9, 10, 11, 12 and 18.
Sector(s): concrete forming, and all work incidental thereto, in the residential sector of the construction industry

Residential Sheet Metal Contractors Organization

Certificate / File No.: 2521-81-R Accreditation Certificate
Decision: Unreported decision of 2521-81-R
Date: September 23, 1982
Respondent: Sheet Metal Workers International Association, Local Union #285
Geographic Area: Board area #8
Sector(s): Residential

Residential Tile Contractors' Association

Certificate / File No.: 2176-08-R Accreditation Certificate
Decision: Accreditation Decision [CanLII]
Date: May 11, 2009
Respondent: Universal Workers Union, Labourers' International Union of North America, L.I.U.N.A. Local 183
Geographic Area: Board areas #8, 9 and 18
Sector(s): Residential

Resilient Flooring Contractors' Association of Ontario

Certificate / File No.: 0731-75-R Accreditation Certificate
Decision: Unreported decision of 0731-75-R
Date: June 11, 1976
Respondent: Resilient Floor Workers, Local Union 2965, United Brotherhood of Carpenters and Joiners of America
Geographic Area: Board area #8
Sector(s): ICI; Residential

Roofing Division of the Toronto Sheet Metal and Air Handling Group

Certificate / File No.: 3853-73-R Accreditation Certificate
Decision: Unreported decision of 3853-73-R
Date: March 26, 1974
Respondent: The Built-Up Roofers' Damp and Waterproofers' Section of the Sheet Metal Workers' International Association Local Union #30
Geographic Area: Board areas #18, 27 and parts of #7, 8, 9, 26 and part of the District of Parry Sound
Sector(s): ICI

Southwest Residential Construction Labour Bureau

Certificate / File No.: 0463-24-R Accreditation Certificate
Decision: 2024 CanLII 79620 (ON LRB)
Date: August 1, 2024
Respondent: Labourers’ International Union of North America, Local 837
Geographic Area: the County of Brant and Norfolk County; the Regional Municipality of Niagara and Haldimand County; the Regional Municipality of Waterloo (except that portion of the geographic Township of Beverly annexed by North Dumfries Township); and the City of Hamilton, the City of Burlington, that portion of the geographic Township of Beverly annexed by North Dumfries Township and that portion of the Town of Milton within the geographic townships of Nassagaweya and Nelson
Sector(s): residential sector of the construction industry, save and except employers bound by and performing work under the Collective Agreement between The Ontario Formwork Association and The Formwork Council of Ontario

Sudbury Electrical Contractors Association

Certificate / File No.: 0596-75-R Accreditation Certificate
Decision: Unreported decision of 0596-75-R
Date: June 28, 1977
Respondent: Local Union 1687 of the International Brotherhood of Electrical Workers
Geographic Area: Board areas #17, 32 and parts of 20, 21, 24, 25 and the District of Nipissing, and part of the District of Parry Sound
Sector(s): ICI; Residential

Terrazzo, Tile & Marble Guild of Ontario, Inc.

Certificate / File No.: 6038-74-R Accreditation Certificate
Decision: Unreported decision of 6038-74-R
Date: May 27, 1975
Respondent: Ontario Provincial Conference of the Bricklayers, Masons and Plasterers' International national Union of America
Geographic Area: Province of Ontario for employers of terrazzo, tile and marble workers and their helpers; see decision/certificate for employers of cement masons, and of resilient floor layers and their helpers. (description is over 350 words)
Sector(s): ICI;Sewers, tunnels and watermains; Roads; Heavy engineering

Terrazzo, Tile & Marble Guild of Ontario, Inc.

Certificate / File No.: 1351-18-R
Decision: 2019 CanLII 4181 (ON LRB)
Date: January 18, 2019
Respondent: Brick and Allied Craft Union of Canada and its Locals 1, 5, 10, 12, 23, 25, 28 and 31
Geographic Area: Province of Ontario
Sector(s): ICI

Toronto and Area Road Builders Association

Certificate / File No.: 1823-98-R Accreditation Certificate
Decision: [2001] O.L.R.D. No. 132 online:QL (OLRD)
Date: January 12, 2001
Respondent: International Union of Operating Engineers, Local 793
Geographic Area: Board area #8 and the County of Simcoe
Sector(s): Roads. (With exceptions)

Toronto & Area Road Builders Association

Certificate / File No.: 2636-01-R Accreditation Certificate
Decision: Accreditation Decision [CanLII]
Date: June 18, 2003
Respondent: Universal Workers' Union Labourers' International Union of North America, Local 183
Geographic Area: Board areas #8 and 18
Sector(s): Roads. (With exceptions)

Toronto Residential Construction Labour Bureau

Certificate / File No.: 2454-99-R Accreditation Certificate
Decision: Accreditation Decision [CanLII]
Date: January 22, 2001 - Amended March 7, 2001
Respondent: Universal Workers Union, Labourers' International Amended, national Union of North America, Local 183
Geographic Area: Board area #8 and the County of Simcoe
Sector(s): Residential (low-rise). (With exceptions)

Toronto Sheet Metal and Air Handling Group

Certificate / File No.: 2845-72-R Accreditation Certificate
Decision: Unreported decision of 2845-72-R
Date: January 25, 1974
Respondent: Sheet Metal Workers' International Association, Local Union #30
Geographic Area: Board areas #18, 27 and parts of #7, 8, 9, 26 and part of the District of Parry Sound
Sector(s): ICI

Utility Contractors' Association of Ontario Incorporated

Certificate/File No.: 2317-12-R Accreditation Certificate
Decision: 2013 CanLII 34996 (ON LRB); amendment 2013 CanLII 38614 (ON LRB)
Date: June 21, 2013
Respondent: Labourers International Union of North America, Ontario Provincial District Council and its affiliated Local Unions 183, 247, 493, 527, 607, 625, 837, 1036, 1059, 1081 & 1089
Geographic Area: Province of Ontario
Sector(s): Residential, pipeline, heavy engineering, the sewers and watermains, roads, and electrical power systems with exceptions

Utility Contractors’ Association of Ontario Incorporated

Certificate/File No.: 2835-14-R Accreditation Certificate
Decision: 2015 CanLII 76908 (ON LRB)
Date: November 18, 2015
Respondent: International Union of Operating Engineers, Local 793
Geographic Area: Province of Ontario
Sector(s): Residential; Pipeline; Heavy Engineering; Sewers and watermains; Roads; Electrical power systems

Walls and Ceilings Contractors Association of Ottawa- Association des constructeurs de murs et plafonds d'Ottawa

Certificate / File No.: 0370-86-R Accreditation Certificate
Decision: Accreditation Decision [CanLII]
Date: January 6, 1987
Respondent: United Brotherhood of Carpenters and Joiners of America, Local 2041
Geographic Area: Board area #15
Sector(s): Residential

Walls and Ceilings Contractors Association of Ottawa- Association des constructeurs de murs et plafonds d'Ottawa

Certificate / File No.: 2854-09-R Accreditation Certificate
Decision: Accreditation Decision [CanLII]
Date: May 18, 2010
Respondent: Operative Plasterers' and Cement Masons' International Association of the United States and Canada, Local 124
Geographic Area: Board area #15
Sector(s): Residential

Waterloo-Wellington Sheet Metal Contractors Association

Certificate / File No.: 2377-72-R Accreditation Certificate
Decision: Unreported decision of 2377-72-R
Date: April 27, 1973
Respondent: Sheet Metal Workers' International Asso- ciation Local Union 562
Geographic Area: Board areas #6, 7, 28 and part of #3
Sector(s): ICI

Windsor Electrical Contractors Association

Certificate / File No.: 6616-74-R Accreditation Certificate
Decision: Unreported decision of 6616-74-R
Date: September 11, 1975
Respondent: International Brotherhood of Electrical Workers, Local Union 773
Geographic Area: County of Kent
Sector(s): ICI; Residential

Windsor Electrical Contractors Association

Certificate / File No.: 6617-74-R Accreditation Certificate
Decision: Unreported decision of 6617-74-R
Date: September 10, 1975
Respondent: International Brotherhood of Electrical Workers, Local Union 773
Geographic Area: County of Essex..
Sector(s): ICI; Residential

Windsor Sheet Metal Contractors Association

Certificate / File No.: 6684-74-R Accreditation Certificate
Decision: Unreported decision of 6684-74-R
Date: May 7, 1975
Respondent: Sheet Metal Workers International Asso- ciation Union Local 235, Windsor Branch
Geographic Area: County of Essex including the City of Windsor
Sector(s): ICI

Wood Mill & Trim Owners Association of Ontario
(c.o.b. as Trim Association of Ontario)

Certificate / File No.: 2805-05-R Accreditation Certificate
Decision: Accreditation Decision [CanLII]
Date: January 16, 2008
Respondent: Carpenters and Allied Workers Local 27, United Brotherhood of Carpenters and Joiners of America
Geographic Area: Board areas #8, 9, 18, 26
Sector(s): Residential (low-rise)

Wood Mill & Trim Owners Association of Ontario
(c.o.b. as Trim Association of Ontario)

Certificate / File No.: 0807-17-R
Decision: 2017 CanLII 63239 (ON LRB)
Date: September 19, 2017
Respondent: Carpenters and Allied Workers, Local 27, United Brotherhood of Carpenters and Joiners of America
Geographic Area: OLRB geographic areas 3, 4, 5, 6, 7, 10, 11, 27 and 28
Sector(s): low-rise residential