Contractors in Ontario

Multi-trade mechanical services contractor, who specializes in Millwrighting, Process Piping and Custom Fabrication in stainless and mild steel.

4 Directions of Conservation Consulting (4 Directions) is 100% owned and operated Indigenous Business and a leader in conservation ecology Indigenous engagement and place making in Ontario. They assist Indigenous communities with regulatory advice, conduct ecological supporting studies, ecological restoration and technical advice or third party audits related to major development projects.

A UK based consultancy and laboratory providing various scientific and environmental services for the rail, construction and civil engineering industries.

401 Electric Ltd. provides electrical services to residential, commercial, and industrial customers in the Brockville, Ontario region. They focus on keeping businesses running with energy solutions and electrical contracting.

We aim to build relationships and bring innovative solutions to all projects, while ensuring that we exceed all standards to future-proof our work. We believe that effective communication is the key to our success and we are here to collaborate with you to ensure your project is successful and comes to fruition.

4Sight Utility Engineers is a private consulting firm specializing in Utility Engineering. Key services include Subsurface Utility Engineering, Utility Coordination and Utility Design.

A & G The Road Cleaners is the largest company for Toronto street cleaning, parking lot sweeping, and power sweeping services, providing comprehensive cleaning solutions for municipalities and commercial properties across Southern Ontario. The company is committed to efficient and environmentally-safe road cleaning services and surpassing city environmental standards.

A to Z Contractors specializes in executive and boutique office construction, renovation, and application of finishes. They have experience in bars, restaurants, fine dining establishments, and big box retailers. They also work on community development projects and custom homes for commercial clients.

A&M Remediation specializes in cost-effective waste and environmental solutions tailored for industrial and remote settings, ensuring regulatory compliance and supporting ESG goals. They focus on optimizing resources, saving money, and contributing to a greener approach to business.

A GTA-based full-service heavy civil construction services contractor offering a diverse range of services to residential, commercial and industrial partners in the construction management and land development sector.

A.P.C.I. Communications Inc. specializes in design and installation of network cabling and wireless infrastructures.

A residential and commercial electrical company serving customers in the GTA since 2006.

A2S Consulting Engineers is a structural engineering firm that services Northeastern and Northwestern Ontario. They specialize in structural engineering, condition evaluations, and restoration projects for various building types.

A2Z Property Maintenance provides property maintenance services including roofing and general repairs.

AB Group of Companies is comprised of AB Project Management & Construction Inc. and AB Fueltration. They provide a range of services to commercial and industrial companies in the Greater Toronto Area and Southern Ontario, focusing on quality, client care, and expert knowledge. The company is TSSA registered and an OPCA member, offering services from concept to completion with a commitment to innovative solutions and client satisfaction.

AC Mechanical Contractors Ltd. is a mechanical contractor supporting industry since 1987, renovating existing systems and providing new installations. They focus on the industrial, commercial, and institutional sector, with a strong focus on institutional hospital work.

ACI Industrial provides highly skilled Millwrights, Electricians, and Custom Metal Fabricators. They offer turnkey solutions and leverage strong vendor relationships to deliver the best possible results for their customers.

Hospitality and commercial construction management and general contracting.

As a proudly Canadian independently-owned mechanical contractor since 1997, Active Mechanical specializes in delivering a broad range of plumbing and HVAC solutions, including, but not limited to new construction, retrofits, boiler, chiller and cooling tower installations, process piping, backflow testing and prevention as well as 24-hour service and maintenance. Active Mechanical has in-house Project Management Professionals, Engineering and Estimating to oversee complete project management and success.

ADA Engineering Solutions Inc. offers in-depth, multi-disciplinary capabilities in a variety of engineering fields including: civil and structural. Furthermore, we provide extensive expertise in design, detailed engineering, detailing and shop drawings, 2D drawing conversions, intelligent 3D plant modeling, as-built engineering, tower design, substation design and project and construction management.

ADASIM Construction Corporation is a premium boutique site servicing contractor; providing a full-service contractor alternative for clients that are seeking large contractor performance on a smaller scale with executive level expertise and service.