General Contractors in Sarnia, ON
Find and compare top-rated general contractors serving Sarnia and surrounding Lambton County communities.
Showing top verified contractors serving Sarnia across Lambton County.
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 95 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 95 general contractors serving Sarnia and surrounding Lambton County communities.
Peats Marine Construction
Professional general contractors serving Lambton County and surrounding areas. Contact us today for a free estimate.
Chalmers Construction Ltd-See Aluma Systems Inc
Professional general contractors serving Lambton County and surrounding areas. Contact us today for a free estimate.
Taiga Industrial Rope Access provides safe, efficient, and specialized rope access solutions across commercial, industrial, and wind energy sectors. Founded by experienced IRATA and SPRAT Level 3 certified professionals, the company delivers versatile access solutions for high-elevation and complex structural environments throughout Ontario and across Canada. With a focus on uncompromising safety, quality, and technical precision, Taiga Industrial offers comprehensive services ranging from wind turbine generator (WTG) blade repair and bridge structural inspections to industrial maintenance and GWO-certified rope access training. Their expert teams provide primary contractors with reliable, cost-effective access solutions tailored to demanding elevated project requirements.
McNally Excavating Ltd.
McNally Excavating Ltd. is a premier heavy civil construction contractor based in Inwood, Ontario, serving Lambton County, Chatham-Kent, Elgin County, and Middlesex County across Southwestern Ontario. With years of industry expertise and a strong local footprint, the company delivers high-quality infrastructure and earthmoving solutions for municipal, commercial, and agricultural developments. As an ISNetworld member, McNally Excavating maintains rigorous standards of health, safety, and corporate compliance across all its job sites. The firm offers a comprehensive suite of civil engineering capabilities, including sewer and watermain installation, full-scale site preparation, street reconstruction, and industrial, commercial, and institutional (ICI) siteworks. From precast box culverts and municipal tile drainage systems to bridge replacements and ditch maintenance, McNally Excavating Ltd. leverages advanced equipment and skilled personnel to complete complex infrastructure projects with precision.
Johnson Wm Constrn Ltd
Professional general contractors serving Lambton County and surrounding areas. Contact us today for a free estimate.
Universal Construction
Professional general contractors serving Lambton County and surrounding areas. Contact us today for a free estimate.
Chonwell Construction Co Ltd
Professional general contractors serving Lambton County and surrounding areas. Contact us today for a free estimate.
Janzen Insulation
Janzen Insulation brings over 21 years of professional insulation expertise to residential, commercial, agricultural, and rural property owners across Southwestern Ontario. Based in Thedford, Ontario, the team delivers energy-efficient solutions tailored to enhance indoor comfort, reduce heat loss, maintain fire separation, and provide effective damp proofing. Specializing in both renovation and new construction projects, Janzen Insulation offers high-performance cellulose fibre blown-in insulation, polyurethane spray foam, fire retardant paint, and heat reflective coatings. Their comprehensive installation services cover home attics, crawlspaces, basements, exterior walls, shop walls, overhead doors, coolers, and barn structures, ensuring optimal energy savings and long-term protection.
Bluewater General Contractors is a full-service construction company based in Sarnia, Ontario, delivering high-quality construction and general contracting solutions across commercial, industrial, and residential sectors. Backed by an experienced team of construction professionals, the company provides end-to-end project execution, ensuring projects are completed on time, within budget, and to the highest standards of craftsmanship and site management. From complete new home construction and full residential renovations to specialized commercial and industrial projects, Bluewater General Contractors offers tailored solutions to meet diverse client needs. Their expertise spans design/build services, structural additions, basement finishing, exterior upgrades, roof rejuvenation, architectural lighting, and custom kitchen and bathroom remodeling.
D&D Contracting
Professional general contractors serving Lambton County and surrounding areas. Contact us today for a free estimate.
Hollinworth Paving
Professional general contractors serving Lambton County and surrounding areas. Contact us today for a free estimate.
D M Construction Inc
Professional general contractors serving Lambton County and surrounding areas. Contact us today for a free estimate.
Bluewater Glass Contractors
Professional general contractors serving Lambton County and surrounding areas. Contact us today for a free estimate.
Professional general contractors serving Lambton County and surrounding areas. Contact us today for a free estimate.
KNK Mechanical Group
K.N.K. Mechanical Group is a premier multi-trade mechanical contractor based in Sarnia, Ontario, serving industrial clients across Ontario and North America. Specializing in the oil, gas, and power generation sectors, the company delivers comprehensive mechanical solutions backed by a team of highly skilled, union-qualified tradespeople including millwrights, boilermakers, and pipefitters. Driven by an unyielding commitment to safety, precision, and quality workmanship, K.N.K. Mechanical Group provides reliable on-time and on-budget project execution. From large-scale industrial construction general contracting and commissioning to routine facility maintenance, fabrication, and precision alignment, the company combines industry-leading safety standards with advanced technology to meet critical project needs.
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.