- Screenhouses Unlimited
 - Offers do-it-yourself kits for screenhouses, gazebos, and sunrooms. - Aecon Group Inc.
- Provides design, build, operate, finance, procurement, and development services to the public and private sectors.
- Giffels Canada
- Consulting and contracting organisation offering a broad range of architectural, engineering, management and construction services worldwide.
- Ledcor Industries
- International general contractor.
- Constructions Geranstruction Ltee.
- Specialising in residential and commercial projects, renovation, trouble-shooting, and building inspection. Offers free estimates.
- CDS Building Movers
- Movers of heritage and historic buildings.
- OakWood Designers & Builders Inc.
- Offers residential and commercial design, renovation, and construction, as well as computerized design and project management.
- Projek Design and Development Inc.
- Specialises in project management, planning and budgeting, design and drawings, construction management, and building services.
- Cal-Dek
- Sells waterproof vinyl sundecks and waterproofing materials for existing decks; also, glass and aluminium handrail systems.
- Germano Construction Corporation
- Specialises in residential, commercial, and industrial building projects and renovations.
- Ontario Wood Custom (OWC)
- Specialise in general contracting, construction services, and custom millwork. Commercial and residential.
- M-U Construction
- Commercial, residential, and industrial contractors.
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