General Contractors in Sarnia, ON
Find and compare top-rated general contractors serving Sarnia and surrounding Lambton County communities.
Whether you are planning a home addition, a basement finish, or a major renovation, finding the right general contractor in Sarnia is the most important decision you'll make. With 53 general contractors listed for the Lambton County area, you can compare experienced professionals who manage everything from permits and subcontractor coordination to finishing touches. A skilled GC acts as your project manager — handling scheduling, trades, inspections, and quality control so you don't have to. Before hiring, always verify proof of general liability insurance, WSIB clearance, and references from recent comparable projects. Browse listings, read reviews, and request free consultations from 53 general contractors serving Sarnia and surrounding Lambton County communities.
LamSar Inc.
Established in 1979, LamSar Inc. is a multi-trade, full-service heavy industrial contractor providing large-scale construction, fabrication, and project management services to household brand names. Operating from offices in Sarnia, Ontario, Canada, St. Clair, Michigan, and Abu Dhabi, UAE, LamSar supports industrial client projects nationally and internationally. The company specializes in comprehensive industrial solutions including module construction, field installation, specialized pipeline prefabrication, and ISO 9001:2015 certified fabrication of pressure vessels and piping. Backed by a skilled multi-trade workforce of pipefitters, electricians, boilermakers, and carpenters, LamSar delivers end-to-end construction management for complex industrial initiatives.
J & J Contracting
Founded in 2015 by Jared Langstaff, J&J Contracting is a trusted family-owned exterior contracting business serving residential and agricultural clients. Drawing on over a decade of hands-on construction experience, the company specializes in premium metal roofing, siding, and custom exterior builds designed to withstand the elements without cutting corners or compromising on quality. J&J Contracting provides a full range of exterior home improvement solutions, including seamless eavestroughs, fascia and soffit installation, window and door replacements, Euro-Shield rubber roofing, and 25-year clog-free Alu-Rex gutter guards. From complete garage construction and pool sheds to agricultural building repairs, their dedicated team delivers precision craftsmanship, durable materials, and reliable customer service.
Concrete Solutions
Concrete Solutions has been providing professional custom concrete services to the Sarnia-Lambton region for over 30 years. Specializing in high-quality flatwork and decorative applications, the company offers a comprehensive range of solutions including traditional broom finishes, eye-catching exposed aggregate, detailed stamped designs, finished floors, waterproofing solutions, and custom decorative finishes. Built on a foundation of craftsmanship, precision, and community values, Concrete Solutions is dedicated to turning client visions into durable, beautiful realities. Beyond their technical concrete expertise, the team is deeply rooted in Sarnia-Lambton and actively supports local non-profits and community initiatives.
Remco Concrete
Remco is a professional concrete contracting company serving Sarnia and the surrounding areas with high-quality concrete workmanship. Combining stylish design with structural integrity, the company delivers dependable concrete solutions tailored for both new home construction and existing residential property improvements. With a focus on durability and visual appeal, Remco ensures every project is expertly installed to enhance curb appeal and property value. From foundational work to custom surface upgrades, home builders and owners can rely on Remco for reliable craftsmanship and long-lasting results.
Sev-Con Paving
Professional general contractors serving Lambton County and surrounding areas. Contact us today for a free estimate.
Canadian Industrial Specialties Ltd
Canadian Industrial Specialties is an environmental remediation and abatement contracting firm serving Southwestern Ontario since 1985. Specializing in residential, institutional, and industrial projects, the company provides safe, professional hazardous material removal backed by comprehensive general liability and pollution insurance. Certified by the Ministry of Environment to store and transport asbestos waste, Canadian Industrial Specialties works closely with environmental consulting firms to execute projects according to strict regulatory standards while maintaining an outstanding WSIB safety record.
Melo's Concrete Waterproofing
Professional general contractors serving Lambton County and surrounding areas. Contact us today for a free estimate.
Precision Concepts Group Inc
Precision Concepts is an industrial mechanical contractor headquartered in Sarnia, Ontario. Established in 2000, the company has grown into an industry leader specializing in the planning, construction, and commissioning of plant systems for clients across Canada and globally. Operating under a comprehensive and rigorously applied safety program, Precision Concepts handles everything from small routine maintenance tasks to large, complex industrial projects with exceptional thoroughness and care. The company provides specialized mechanical engineering and field services, including the installation, alignment, rerating, and maintenance of heavy industrial equipment such as turbines, compressors, generators, and centrifugal or reciprocating machinery. Supported by a 24-hour machine shop and a team of experienced specialists, Precision Concepts delivers reliable, cost-effective solutions for routine operations as well as major plant turnarounds, outages, and shutdowns.
SGC Modern Homes
Professional general contractors serving Lambton County and surrounding areas. Contact us today for a free estimate.
B & D Insulation Inc
B&D Insulation Inc. is a Canadian-owned and operated contractor based in Sarnia, Ontario, specializing in top-quality insulation, abatement, and industrial coating services. Established in 1949, the company serves industrial, commercial, and institutional sectors across both large-scale projects and urgent, time-sensitive emergencies. With decades of industry expertise, B&D Insulation Inc. is dedicated to delivering reliable solutions that enhance energy efficiency, workplace safety, and long-lasting structural performance. Beyond traditional insulation, B&D Insulation Inc. offers comprehensive specialized contractor services including asbestos, lead, PCB, and mould abatement, as well as fireproofing, removable insulation covers, and NACE-certified coating inspection services. Their team works closely with clients to provide custom-tailored solutions, managed maintenance programs, and advanced coating applications designed to protect critical infrastructure and prevent corrosion under insulation.
Canadian Structural & Mechanical Ltd
Professional general contractors serving Lambton County and surrounding areas. Contact us today for a free estimate.
Maaten Construction Limited
Professional general contractors serving Lambton County and surrounding areas. Contact us today for a free estimate.
Triad Contracting
Professional general contractors serving Lambton County and surrounding areas. Contact us today for a free estimate.
John Boot Construction Ltd
Professional general contractors serving Lambton County and surrounding areas. Contact us today for a free estimate.
Insultek Inc
Professional general contractors serving Lambton County and surrounding areas. Contact us today for a free estimate.
Frequently Asked Questions — General Contractors in Sarnia
How do I verify a general contractor is legitimate in Ontario?
Ask for proof of general liability insurance and WSIB coverage, check for any trade licences required for the work (electrical, plumbing, gas), verify their business registration, and request references from recent projects in Sarnia or the surrounding Lambton County area.
Do I need a building permit for my renovation in Sarnia?
Most structural renovations, additions, and significant interior changes require a permit from your local municipality. A reputable general contractor will know what permits are needed and will pull them on your behalf before work starts.
How much does a home renovation cost in Sarnia?
Renovation costs vary enormously by project scope. A kitchen or bathroom refresh might run $10,000–$30,000; a full addition or basement finish can range from $50,000 to $200,000+. Always get a minimum of three written quotes and confirm what is and is not included.
What should a contractor's written contract include?
A solid contract should specify the scope of work in detail, materials and brands to be used, start and end dates, payment schedule tied to milestones, warranty on workmanship, and a process for handling changes or overruns. Never pay more than 10–15% upfront.