List of Construction companies in Ontario

Aecon Group Inc.aecon.com

Provides integrated construction solutions for civil, urban transportation, nuclear, utility, and industrial sectors, plus project development, financing, investment, and operations.

EllisDonellisdon.com

An employee-owned construction company providing comprehensive services in capital projects, facilities management, and sustainable buildings, leading innovation in the construction sector

Black & McDonald Limitedblackandmcdonald.com

Integrated multi-trade service provider delivering high-quality construction, facilities management, and technical solutions across North America with operational excellence.

Bird Constructionbird.ca

Canadian construction and maintenance provider with diversified services for industrial, infrastructure, and buildings markets, emphasizing safety, service, and value

Flynn Group of Companiesflynncompanies.com

Leading North American building envelope contractor offering roofing, glazing, metals, waterproofing services Seeking to merge with like-minded companies for growth opportunities

Colas Canada Inc.colas.com

A leading company in construction and maintenance of transportation infrastructure across Canada, part of a global group with operations worldwide

Green Infrastructure Partnersgipi.com

A diversified infrastructure company in Canada, specializing in sustainable solutions and vertically integrated infrastructure for public and private projects

Modern Niagaramodernniagara.com

We specialize in creating comfortable, healthy indoor spaces, focusing on long-term sustainability, community impact, and providing mechanical, electrical, and building services solutions

Aluma Systemsaluma.com

Supplier of concrete formwork and shoring systems for Commercial and Civil contractors globally Offering safe, efficient solutions for major projects

Defence Construction Canadadcc-cdc.gc.ca

A Crown corporation providing contracting, construction management, infrastructure, environmental, and lifecycle support services for Canada's defence requirements through five service lines

Harris Rebarharrisrebar.com

North America's leading fabricator, installer, and distributor of concrete reinforcing steel and related products, focused on safety, profitability, and customer satisfaction

Infrastructure Ontarioinfrastructureontario.ca

A world-class agency that creates value from public assets, building a connected and competitive province through partnerships and seamless execution

Nucor Rebar Fabricationharrisrebar.com

A leader in rebar detailing, fabrication, and installation, offering construction expertise to find cost-effective alternatives and prioritizing employee well-being

Plan Group Inc.plan-group.com

A dynamic construction company offering design, build, integration, and maintenance services in electrical, mechanical, and ICAT industries, expanding into service and facilities management

E.S. FOX LIMITEDesfox.com

A Canadian industry leader providing a wide range of construction, fabrication, engineering, and service solutions with a strong focus on quality and customer satisfaction

The Miller Groupmillergroup.ca

A leading road construction company in Canada with a long history of excellence, investing in employees, embracing diversity, and offering rewarding careers

Coreslab Structurescoreslab.com

A leading producer of precast/prestressed concrete products, providing innovative solutions for commercial, residential, infrastructure, institutional, and industrial projects across North America

Cooper Equipment Rentals Limitedcooperequipment.ca

Leading provider of rental equipment in Canada, offering compact, heavy, and aerial options Specializing in Trench Safety and Pump & Power divisions

Troy Life & Fire Safety Ltd.troylfs.com

Canada's leading provider of fire alarm, suppression, nurse call, security, and energy saving solutions, offering 24-hour service nationwide for life safety needs

Tomlinson Group of Companiestomlinsongroup.com

Multidisciplinary construction and environmental services provider with expertise in infrastructure projects, site development, material management, and innovative solutions

Colliers Project Leaderscolliersprojectleaders.com

This company provides project management services with a focus on client success, offering support from single requirements to full project management

Amico Affiliatesamico.build

A company specializing in land development and construction services in Ontario with a dedicated team of professionals for successful project delivery

Trideltridel.com

Leader in Toronto's condominium living with 90 years of expertise, delivering over 90,000 homes Offers new condo homes, high-rise, townhomes, and lofts Built Green

Dufferin Construction Companydufferinconstruction.com

A division of CRH Canada Group Inc, specializing in construction services Visit the parent company's LinkedIn page for more information

OZZ Electric Inc.ozzelectric.com

Leading electrical contractor specializing in large-scale projects, design/build work, and renewable energy solutions across North America Celebrating 35 years in business

LIUNA Local 183liunalocal183.ca

Construction workers' union in Greater Toronto Area, providing safety, representation, and training for over 57,000 members in various industries

State Window Corporationstatewindowcorp.com

Specializing in custom window wall systems, this company provides design, engineering, manufacturing, and installation services with a focus on partnership and quality

Ontario Transit Group - Ontario Line - Southern Civil, Stations & Tunnel

A joint venture constructing the Ontario Line Subway, including tunnels, stations, and civil works for Metrolinx and Infrastructure Ontario

CRH Canadacrhcanada.com

Leading producer and supplier of construction products and services across Canada, with a focus on innovation, sustainability, and commitment to local communities

Vipond Inc. First for Fire Protection, Life Safety & Securityvipond.ca

A team of 650 specialists provides fire protection and security solutions for various buildings, leading the Canadian industry with quality and integrity

Maple Reindersmaple.ca

A full-service construction provider specializing in ICI building and civil/environmental construction across Canada with over 50 years of experience

Skyway Canadaskywaycanada.ca

A leading provider of scaffold, shoring, fireproofing, insulation, and rope access solutions, setting industry standards for quality, safety, and efficiency

BVGlazing Systemsbvglazing.com

Designing, manufacturing, and installing commercial-grade glazing, cladding, railing, and entry systems in the North American architecture and construction markets for over 60 years

Hilti Canadahilti.ca

A global leader in providing technology for faster, safer, and sustainable construction Offers innovative solutions, tools, fasteners, anchors, and software

IUOE Local 793iuoelocal793.org

Representing skilled workers in construction, industrial, and mining sectors across Ontario and Nunavut Training, building roads, bridges, pipelines, stadiums, and more

Restoration 1restoration1.ca

Specializing in water damage restoration, mold remediation, fire/smoke cleanup, and storm response services for residential and commercial properties, with a focus on customer needs

WINMAR® Property Restoration Specialists - Corporatewinmar.ca

Leading Canadian property restoration company offering services for flood, fire, wind, mould, sewer, vehicle impact, and board-up with 24/7 emergency services for insurance industry and clients

Bothwell Accurate Co. Inc.bothwell-accurate.com

A leader in roofing, waterproofing, and cladding services for industrial, commercial, and institutional buildings, with over 90 years of experience

Walters Groupwaltersgroupinc.com

A family-owned steel construction company delivering seamless services for commercial and industrial projects with a focus on innovation and client satisfaction

Guild Electric Limitedguildelectric.com

An established electrical contractor in Canada with a team of skilled employees offering electrical construction, communications, highways/traffic services, and maintenance with a focus on safety and efficiency

Smith and Longsmithandlong.com

Established in 1930, this company provides comprehensive electrical and mechanical services with a nationwide network of skilled workers, specializing in technical projects

McAsphalt Industries Limitedlinktr.ee

A Canadian leader in asphalt production, distribution, services, and technology with a wide range of products and a focus on customer satisfaction

RHCrhcbuilds.ca

Innovative construction and design management company focusing on collaborative, integrated project teams for smarter builds with shared objectives Familiar with Ontario projects

AGF Rebar Inc.groupeagf.com

A rebar company born of a merger, offering first-class products and services for reinforcing steel projects, with a focus on cost control and continuous improvement

Robert B. Somerville Co. Limitedrbsomerville.com

Provides comprehensive infrastructure services in Canada, including planning, building, and maintenance of oil and gas pipelines, power systems, renewables, and utilities

Thomas Cavanagh Construction Limitedflow.page

Leading construction contractor and aggregate supplier in Eastern Ontario, providing quality materials, site development, and integrated project solutions.

Kenaidan Contracting Ltd.kenaidan.com

Building company, specializes in heavy civil, transportation, institutional, educational, athletic facilities, municipal treatment plants, and structural concrete projects, concrete formwork and mechanical systems.

Great Gulfgreatgulf.com

Innovative home builder focusing on design, technology, and experience to create homes with higher resale and rental value

Strongcostrongco.com

A major Canadian dealer of diverse mobile equipment for construction, mining, forestry, and other industries, offering sales, rentals, and service

Marathon Underground Constructors Corporationmarathonunderground.com

Specializing in trenchless technologies, shoring, rock stabilization, and geotechnical drilling, this leading Canadian specialty contractor adds value to infrastructure projects through geotechnical expertise

Eastern Construction Company Limitedeasternconstruction.com

Employee-owned construction company in Canada with over 70 years of experience delivering innovative, sustainable solutions in various sectors using advanced construction management techniques

Dragados Canada, Inc.fdcorp.com

A leading construction brand in ACS Group, specializing in infrastructure projects worldwide, with expertise in bridges, highways, tunnels, dams, and marine works

SEF®southsx.com

Metal fabricating company specialized in greenhouse parts, equipment, and structures, offering complete solutions from design to installation to improve business productivity

Urbaconurbacon.net

A Canadian construction company founded in 1984, focusing on delivering high-quality construction projects with a commitment to excellence and client satisfaction

McNally Companiesmcnallycorp.com

Specializing in tunnel and marine construction, this company has been a Canadian leader in heavy construction projects since 1949

Premform Ltd.premform.com

Specializing in high rise building construction services, including concrete forming, tower crane division, erection/dismantle, repairs, maintenance, and troubleshooting

Condrain Groupcondrain.com

A family-owned group of vertically-integrated companies in the construction industry, offering services in concrete, drainage, land development, property management, and aggregates supply

CCNccn-uk.com

Family-owned manufacturer of high quality doorsets, screens, and ironmongery Building lasting relationships by delivering satisfaction in various sectors Tel: 0191 427 7779

Rankin Construction Inc.rankinconstruction.ca

An innovative and diverse construction company specializing in heavy civil projects such as roads, bridges, sewer systems, marine construction, and renewable energy

TESC Contractingtesc.com

A multi-trade construction services provider specializing in industrial projects, plant/facility maintenance, custom fabrication, and pre-engineered buildings for various markets

Pioneer Construction Inc.pioneerconstruction.ca

A leading construction company in Northern Ontario offering quality services in road construction, heavy construction, maintenance, and community support

Tribute Communitiesmytribute.ca

An award-winning builder with 40 years experience, creating high-quality homes and condominiums above industry standards in the Greater Toronto Area

Neelands Groupneelands.com

A leading company in North America providing design, installation, and service for refrigeration, HVAC, controls, energy management, and performance analytics software

Naylor Building Partnerships Inc.naylorbp.com

A multi-trade contractor providing mechanical, electrical, plumbing, and compressed air services to commercial and industrial sectors, emphasizing partnerships and excellence since 1968

NPL Canadacenturi.com

A leading utility contractor specializing in pipeline construction, rehabilitation, and maintenance, serving utilities, corporations, and developers with a focus on safety and sustainability

Garage Livinggarageliving.com

Full-service garage remodeling solution offering high-quality products, experienced team, competitive pricing, and franchise opportunities for individuals passionate about design and construction

FERMARfermarltd.com

Fully integrated general contractor in GTA with over 50 years of experience in road, rail, and commercial projects, focusing on quality, safety, and productivity

Great Northern Insulationgni.ca

Leading provider of building envelope services for new construction and retrofits across commercial, residential, and industrial sectors in Ontario.

PreConpre-con.com

A leading provider of architectural and structural precast solutions in Ontario, offering innovative design, fabrication, and construction services with a focus on quality and safety

Alumicoralumicor.com

Canadian-based supplier of Architectural Aluminum building envelope products with a focus on innovation, sustainability, workplace safety, and serving the North American market

Concastconcastpipe.com

A full-service supplier to the sewer and watermain industry in Ontario, providing superior quality products with fast turnaround times

Toromont Industries Ltdtoromont.com

A leading provider of Caterpillar equipment sales and rentals, along with industrial and recreational refrigeration system design, engineering, fabrication, and installation

HC Matcon Inc. / HCM Contractors Inc.hcgroup.ca

A full-service contractor specializing in sustainable foundations, offering a variety of geotechnical excavation, shoring, and foundation techniques with a focus on innovation and teamwork

Gillamgillamgroup.com

A construction management firm in Toronto specializing in medium-sized projects, offering services such as project management, design management, cost consulting, and safety consulting

MultiTech Trades Corp.multitechcorp.ca

MultiTech Trades is a full-service construction and services contractor in Ontario, specializing in Mechanical and Electrical services from project conception to completion

Skyline Groupskylinegroupintl.com

Leading provider of permanent roof safety and access systems in Canada Specializing in ladders, guardrails, walkways, bridges, and platforms for easy compliance

SKYGRiDskygrid.ca

Industry-leading construction company serving industrial, commercial, institutional, and residential markets with a collaborative team approach to fulfill building purposes

Pro-Bel Enterprises Limitedpro-bel.com

Specializes in designing and engineering anchorages for suspended maintenance, ensuring buildings have proper safety measures in compliance with labor regulations

Energy Network Services Inc.ensinc.ca

Energy Network Services specializes in energy efficient lighting solutions and maintenance for commercial, industrial, and institutional facilities, providing innovative services Canada-wide

James Dick Construction Ltd.jamesdick.com

The company focuses on being energy efficient in producing construction materials, providing quality services, protecting the environment, and creating essential infrastructure for society

Matrex Window System Inc.matrexwindow.com

Innovative manufacturer of window walls, curtain walls, and railing systems, offering a unique full cycle process from creation to installation for customized designs

FCFPclassicfls.com

Specializes in fire protection services and life safety solutions through a partnership with FCFP, now operating under the name Classic Fire + Life Safety

Sotawall Limitedharmoninc.com

A leading curtain wall supplier providing unique design capabilities and streamlined manufacturing methods for over 25 years

Equipment World Inc.equipworld.com

Providing innovative solutions since 1973 for forestry, mining, industrial, farming, freight, and material handling industries, as well as construction specialties for various facilities

Cormorantcormorantutility.com

Provider of comprehensive solutions in the utility power sector through expert Engineering, Construction, Design, and Manufacturing services prioritizing safety and quality

Bartell Globalbartellglobal.com

An international manufacturer specializing in quality equipment for the construction industry, prioritizing the needs of contractors in all product designs

Ennova Facades Inc.ennovafacades.com

A leading player in the glazing industry, specializing in custom design solutions for curtain walls with a focus on energy efficiency and top-notch quality

M-Roc Ltd.m-roc.ca

A drilling and blasting company in Ottawa, Canada, with engineers specializing in complex projects, prioritizing safety and collaboration with clients

TAGG Industriestaggind.com

Specializing in custom and innovative glazing solutions, we cater to architects and general contractors in the institutional, commercial, and retail sectors Bringing designs to life

Yarlmetal Fabrications Incyarlmetal.com

A medium-sized company specializing in composite panels, aluminum shapes, and glazing products for commercial construction, with a focus on efficiency and customer satisfaction

Modern Elevatormodernelevator.com

A family-operated elevator company in Hamilton, Ontario, offering installation, modernization, and shipping services worldwide with a focus on quality and customer satisfaction

Integro Building Systems Canadaintegrobuild.com

The company specializes in manufacturing products

SerCo Construction Ltdsercoconstruction.ca

A family-owned construction drywall company in Ottawa, with 35 years of industry experience, providing high-quality service and production through skilled labor and innovation

Page Flooring Inc.pageflooring.com

Specializing in commercial and residential flooring services since 1959, providing top-quality products, expert installation, and exceptional customer service for ultimate satisfaction

Cladco Limitedcladco.com

A leading provider in North America of panelized solutions for interior and exterior cladding, offering a variety of materials and services for the construction industry

Thames Glass Limitedthamesglass.ca

A provider of innovative glass and glazing solutions in Southwestern Ontario since 1966, working on design-build projects with architects and contractors

Total Air Solutions Inc.totalairsolutions.ca

A reputable HVAC company in Ottawa offering a wide range of services, led by a president with 30 years of experience managing projects of all sizes

JP Gravel Construction Inc.jpgravelconstruction.ca

Commercial construction company specializing in fast track/commercial interiors, internet/switch rooms, retail, and medical/dental/clinics with expertise, competitive pricing, and quality workmanship

Mirror Interiorsmirrorinteriorsbuilder.com

Custom manufacturer of high quality glass and mirror products with extensive service and installation experience in high-rise condos, hotels, and new home developments 30 years of industry leadership

Geomaple Canada Inc.geomaple.ca

Specializing in advanced surveying solutions, Geomaple Canada Inc offers airborne remote sensing, GIS, and image analysis services for various industries and government sectors