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General contractors in Thornhill, Ontario

Looking for a general contractor in Thornhill, Ontario? Post your project on HomeStars and get matched with Thornhill, Ontario building contractors in your area. Browse profiles, read genuine customer reviews, and discuss your project details with interested pros. All before you make your final choice.

Some of our top rated general contractors in Thornhill, Ontario

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  • General contractor in Thornhill, Ontario

    SMYRNA ROOFING - Flat Roof Specialists: From Quick Fixes to Full Replacements Leaking flat roof? Old roof needing upgrade? We handle it all with professional TPO, EPDM, and 2-ply torch-down systems.Our step-by-step solutions tailored to your needs and budget: Emergency Temporary Repair Same-day or next-day service (weather permitting). Fast leak stop using patches, sealants, tarps, or temporary torch-on. Protects your home immediately – no more water damage! Permanent Spot Repair Full inspection after the emergency. Targeted fixes on damaged areas with heat-welded TPO/EPDM or torch-down materials. Cost-effective for smaller issues, with warranty. Full Production: Complete Replacement or Layover Tear-off and new installation, or layover (new layer over existing roof for faster/cheaper option). Top-quality materials: • TPO (energy-efficient) • EPDM (durable rubber membrane) • 2-Ply Torch-Down (super waterproof modified bitumen) Serving Toronto & GTA. Experienced, Honest advice – we recommend the best option for you! SMYRNA ROOFING – Dry homes, happy customers.

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  • General contractor in Thornhill, Ontario

    A.R.M.3 Construction provides multiple services such as drywall repair or new installation, plastering, panting, pop corn ceiling repair or new application, flooring, tiling, backsplash, and more

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  • General contractor in Thornhill, Ontario

    Taraz Air Inc. has proudly served the GTA for over 10 years, providing reliable heating, cooling, and custom ductwork services. We specialize in furnace, A/C, and heat pump installations, gas lines, and HRV systems—always with quality workmanship and honest service. Serving Newmarket, Richmond Hill, Aurora, Vaughan, and the GTA.

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  • General contractor in Thornhill, Ontario

    Mail address info@bsrcontractinggroupcom BSR Contracting Group is a trusted home renovation and repair company based in the Greater Toronto Area. We specialize in painting, drywall installation, plaster repair, and all types of home improvement services. Our goal is simple — to deliver high-quality workmanship, reliable service, and a clean finish every time. Whether it’s a small touch-up or a full renovation, we treat every project with care and attention to detail. At BSR Contracting Group, we believe your home deserves the best. We take pride in our work and always ensure customer satisfaction from start to finish. Services: Interior & exterior painting Drywall installation and repair Plaster & ceiling repair Home renovation & finishing Contact us today to make your home look its best — professional, clean, and done right.

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  • General contractor in Thornhill, Ontario

    Refined Trim & Doors specializes in high-quality finish carpentry, interior trim, and door installation services. We take pride in delivering clean, precise craftsmanship that elevates the look and feel of your home. From baseboards and crown moulding to door installations and detailed finishing work, our focus is on accuracy, durability, and refined detail. With a commitment to professionalism and customer satisfaction, we work closely with homeowners, contractors, and designers to ensure every project is completed on time and to the highest standards. Whether you're renovating a single room or finishing a full home build, Refined Trim & Doors brings expertise, reliability, and a sharp eye for detail to every job. At Refined Trim & Doors, we don’t just install trim and doors, we perfect the finishing touches that make your space stand out.

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  • General contractor in Thornhill, Ontario

    Hi i am long term running business i have had success for 10 years plus i can match any price or even better we don’t expect payment int ill the homeowner is happy

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  • VK Construction and Renovation Inc can help you with your house renovation, install or renovate bathroom, install or renovate kitchen, build sunroom, extension, build garage, build or renovate basement, build pergola, gazebo or garden house, build carport, install or replace beam, install or repair lift/elevator, build shed, general contractor service, structural work for construction, build shelter or outbuilding, carpentry framing, install, repair or replace caulking & accessibility modifications request in Mississauga and its surrounding cities. They’re at your disposal to listen and assist you in all your projects. Get in touch with VK Construction and Renovation Inc now to discuss your needs and arrange a quote.

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  • General contractor in Thornhill, Ontario

    Inherited the skills from the best Teachers possible, and helped Ontario to look fresh for past 10 years:)

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  • General contractor in Thornhill, Ontario

    I am a professional installer with several years of hands-on experience in assembling prefabricated structures such as wood and metal sheds, gazebos, and other outdoor buildings. In addition to installation services, I also design and build custom metal fences tailored to each client's specific needs and property layout. Based in Newmarket, Ontario, I proudly serve the Greater Toronto Area and nearby regions. I bring all necessary tools, work efficiently and cleanly, and treat every job site with respect. Whether you need a secure, level shed installation or a custom-designed metal fence, I make sure the job is done right the first time with high-quality craftsmanship and attention to detail

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  • General contractor in Thornhill, Ontario
    • Best of Newly Listed 2025

    Welcome to J & J Renovations here transformation meets craftsmanship. As a premier renovation company, we pride ourselves on turning visions into reality. With a team of skilled professionals and a commitment to excellence, we bring innovation to every project, ensuring your space reflects both functionality and aesthetic appeal. Discover the art of renovation with J&J Renovations.

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  • R.D.International Contractor is a family owned business based in Mississauga, Ontario. We have been serving the GTA along with the Peel and Durham Region since 1995. R.D. specializes in stucco, basement renovations, home renovations, fake stone, interlocking, washrooms, moulding /crown mouldings. Our nature of work, attention to detail, customer service and capability to schedule and complete projects in a timely fashion is what makes us different from our completion. We value our customers and insure they are beyond ecstatic with their finished project. Your go-to experts!

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  • General contractor in Thornhill, Ontario

    At REMARK HOMES & COMMERCIAL SERVICES INC, we started with a simple yet powerful vision: to restore professionalism, trust, and care to home and commercial property services. Driven by a passion for helping people take pride in their spaces, we’ve built a reputation for providing dependable, high-quality solutions. From day one, our goal has been to earn the trust of our clients through exceptional service. Whether it's cleaning, landscaping, handyman work, moving, or property maintenance, our team approaches every task with dedication, integrity, and a keen eye for detail. What truly sets REMARK apart is our unwavering commitment to doing things the right way—no shortcuts, no empty promises. We prioritize clear communication, fair pricing (with credit cards accepted), and results that speak for themselves.

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  • General contractor in Thornhill, Ontario

    BSW Design creates homes that endure—crafted with intention, built with integrity, and designed for effortless living. With deep roots in equestrian heritage and a passion for legacy builds, we take on exclusive projects where quality and longevity come first. Every design is thoughtfully curated, blending timeless aesthetics with refined functionality to create spaces that feel both sophisticated and lived in from day one.

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  • General contractor in Thornhill, Ontario

    Precision Drywall & Framing: Decades of Mastery 🏗️ At Bustamante Drywall, we provide the structural integrity and flawless finish your home deserves. Our father-son team brings a unique blend of "old-school" craftsmanship and modern, Red Seal-certified expertise to every project. Why Choose Us? Red Seal Certified: Our lead installer holds a Red Seal in Drywall and Metal Framing, ensuring every job meets the highest national standards for quality. 40+ Years of Experience: Partnered with a master taper boasting four decades in the trade, we deliver a level of finish that only comes from a lifetime of hands-on work. Flawless Finishing: From laser-straight metal framing to seamless Level 5 taping, we specialize in paint-ready surfaces that look perfect under any lighting. Reliable & Clean: We pride ourselves on punctuality, transparent communication, and leaving your job site spotless. Our Services Custom Metal & Wood Stud Framing Professional Drywall Boarding Expert Taping, Mudding & Sanding Water Damage Repairs & Patchwork Basement Renovations & Room Conversions Contact us today for a free estimate—let’s get your project started right!

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  • General contractor in Thornhill, Ontario

    A highly skilled locksmith with over five years of hands on experience in the industry. Known for reliability, precision, and integrity, provides professional locksmith services for residential, commercial, and industrial needs. With a strong focus on customer satisfaction, safety, and quick response times, approaches every job with care and attention to detail. Whether it’s emergency lockouts, lock repairs, rekeying, or security upgrades. clients can trust to deliver dependable solutions and quality workmanship every time.A highly skilled locksmith with over five years of hands on experience in the industry. Known for reliability, precision, and integrity, provides professional locksmith services for residential, commercial, and industrial needs. With a strong focus on customer satisfaction, safety, and quick response times, approaches every job with care and attention to detail. Whether it’s emergency lockouts, lock repairs, rekeying, or security upgrades. clients can trust to deliver dependable solutions and quality workmanship every time.

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4.9

Top rated general contractors

Our general contractors in Thornhill, Ontario, are rated 4.9 out of 5 based on 836 reviews from homeowners like you.

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What types of services are offered by local general contractors in Thornhill, Ontario?

Whether it's a home renovation or a commercial project, a local general contractor in Thornhill, Ontario can help streamline the process. They’ll handle everything from project planning to construction, making sure the work is done right, on time, and within budget.

Popular general contractor services include:

  • Installing or replacing a roof
  • Repairing or maintaining a roof or gutter
  • Installing or renovating bathroom
  • Paving installation

Wondering how to find a general contractor in Thornhill, Ontario? Make your search easier with HomeStars. Just post your job, provide a few details, and choose from available general contractors in Thornhill, Ontario. It’s quick, simple, and hassle-free.

What is the average cost of hiring a general contractor in Thornhill, Ontario?

On average, general contractors in Thornhill, Ontario typically charge an average hourly rate of $50 to $150. In some cases, they might charge per project, such as for smaller renovations or larger construction jobs, with costs ranging from $5,000 to $200,000 or more. Thornhill, Ontario general contractors may also charge 10% to 20% of the total project cost, depending on the scope of work.

For common general contractor jobs, expect to pay:

Find a general contractor in Thornhill, Ontario on HomeStars

Finding the right general contractor in Thornhill, Ontario is all about matching your project needs with the right experience and budget. HomeStars makes it easy to connect with Thornhill, Ontario building contractors who have a proven track record, with customers leaving reviews and ratings based on their past work.

How to hire Thornhill, Ontario general contractors on HomeStars:

  1. Start by posting your project. Add details about the work and include pictures for accurate quotes.

  2. Read through and compare profiles of general contractors based in Thornhill, Ontario.

  3. Connect with a general contractor in Thornhill, Ontario to discuss your project, request a quote and ask any questions.

  4. Hire the right pro to get the job done and leave a review based on your experience.

Whether it’s a small renovation or a major construction project, HomeStars lets you easily review and select general contractors in Thornhill, Ontario with confidence. All building contractors in Thornhill, Ontario who register on our platform are verified through ID checks, so you can hire the right pro with peace of mind.

What to ask a Thornhill, Ontario general contractor before hiring?

Before you hire, you might want to ask general contractors in Thornhill, Ontario the following questions to get a better understanding if they’ll be a good fit for your project.

What types of projects do you usually handle?

A general contractor in Thornhill, Ontario should be able to outline the types of projects they specialize in, such as home renovations, new builds, or commercial construction. Local experience as a contractor in Thornhill, Ontario is important for understanding regional building codes and construction practices.

Do you handle permits, inspections, and subcontractor coordination?

The right Thornhill, Ontario general contractor will manage permits, inspections, and coordinate subcontractors, ensuring your project meets legal and safety requirements without unnecessary delays.

Do you carry general liability insurance and WCB coverage?

All general contractors in Thornhill, Ontario should carry general liability insurance and be registered with the provincial Workers’ Compensation Board to protect both you and their team in case of accidents or property damage.

How do you handle disputes or issues during construction?

A general contractor in Thornhill, Ontario should have a clear process for managing disputes, unexpected delays, or mistakes. They should be able to explain how they communicate issues, propose solutions, and involve you in decision-making when adjustments are needed.

Who will manage the project on-site, and how will communication work?

Clarify who oversees daily operations and how you’ll stay updated throughout the project. The Thornhill, Ontario building contractor should assign a dedicated foreperson or project manager to coordinate all aspects of the work, including supervising subcontractors and scheduling inspections.

FAQ: Common questions about general contractors in Thornhill, Ontario

How long does a typical renovation or construction project in Thornhill, Ontario take?

Project timelines depend on size and complexity. A Thornhill, Ontario general contractor will provide a realistic schedule with start and completion dates and will update you on milestones throughout the project.

When should I hire a general contractor?

Hiring a Thornhill, Ontario general contractor early in the planning phase is ideal, especially for large renovations or construction projects. They can help with budgeting, timelines, permits, and coordination from the start.

Do general contractors in Thornhill, Ontario handle cleanup after the project?

Most building contractors in Thornhill, Ontario include cleanup as part of their services, ensuring debris is removed, the site is safe, and your property is left in good condition once work is complete.

Do general contractors offer design advice or planning support?

Some general contractors in Thornhill, Ontario provide design input, helping you optimize space, layout, and materials. While they may not replace an architect, their practical experience can improve efficiency and cost-effectiveness.

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