Built to Impress.Built to Last.
From custom hardwood floors and handcrafted woodwork to full basement builds and kitchen renovations — GSA Custom Carpentry brings precision craftsmanship and professional results to every project.
100% 5-Star Rated
on Google
Licensed & Insured
Full protection for you
Serving London & Region
& Southwestern Ontario
Free Estimates
No obligations
1-Year Warranty
On all workmanship
The Craftsmanship Speaks for Itself
We take pride in our work, and it shows. Browse our gallery to see examples of our custom flooring, woodwork, kitchen renovations, basement builds, and more — then get in touch to talk about your project.
Like what you see? Let's talk about your next project.
Request a Free EstimateRenovation & Carpentry Services
From the first nail to the final finish, we handle it all — with craftsmanship you can see and quality you can feel.
Custom Flooring
Hardwood, engineered, laminate, and LVP installation done right — perfectly fitted, flawlessly finished.
Custom Carpentry & Woodwork
Trim, built-ins, cabinetry, feature walls, staircases — handcrafted detail work that sets your space apart.
Kitchen Renovations
From layout to final cabinet hardware, we build kitchens designed for how you actually live.
Basement Finishing & Builds
Turn your unfinished basement into a livable, functional space — framing, drywall, flooring, and everything in between.
Full Home Renovations
One point of contact for large-scale interior renovations. Coordinated, clean, and professionally managed from start to finish.
Painting & Interior Finishing
Clean lines and a professional finish to complete every project — interior painting and finishing done with the same attention to detail.
Not sure if we cover your project?
Get in Touch and Let's Talk Family Owned.
Built to Be Proud Of.
GSA Custom Carpentry is a family-owned, licensed and insured renovation contractor serving homeowners and commercial clients across London, Sarnia, Chatham, Strathroy, St. Thomas, Grand Bend, Kitchener, Guelph, and everywhere in between in Southwestern Ontario.
Being family owned means we take every project personally. We're known for our custom woodwork and flooring — but what we deliver goes well beyond a single trade. Whether you're updating a kitchen, transforming a basement, or undertaking a full home renovation, we bring the same care and craftsmanship to every detail.
We care about the quality of our work because we know how it feels to stand in a space you're proud of — one you can't wait to show your guests.
GSACustom CarpentryWhat Sets GSA Apart
There's no shortage of contractors out there. Here's why our clients choose us — and why they come back.
Quality First, Every Time
We don't cut corners to hit a lower price. Every project gets the same level of workmanship — the kind that holds up years down the road.
Fast Turnaround Without Sacrifice
We work efficiently and keep projects moving. You won't be waiting weeks between visits or left wondering where your contractor is.
1-Year Workmanship Warranty
We stand behind our work. If something isn't right within a year of completion, we make it right — no runaround.
Licensed & Fully Insured
You're protected. We carry full licensing and insurance so you can hire with confidence.
Attention to Detail and to You
We listen. We communicate. And we make sure your vision is what actually gets built.
Premium Materials Only
We guide our clients toward the right materials for longevity and performance — not just the cheapest option on the shelf.
100% 5-Star Rated on Google
Don't take our word for it. Here's what homeowners across Southwestern Ontario are saying about working with GSA.
"Gerardo, Saul Senior and Saul Junior made an excellent team in renovating a large portion of my house. They put gorgeous new laminate flooring throughout the entire house, refurbished and painted my kitchen cabinets, and completely transformed my upstairs bathroom...."
Natalie J. Brown
"Renovated nearly our whole house and did an incredible job. Attention to detail was superior, always kept us updated on how the project is going and what needs to be done...."
Callum Bentley
"Have hired for multiple jobs, always goes the extra mile in making sure things are done right!"
Matthew Grendys
"They did a very good job on flooring plus they give a good warranty as well. Much recommended."
Rushabh Shah
"As the housing coordinator for the Munsee-Delaware Nation, I can't say enough good things about GSA Custom Carpentry. We've entrusted them with both large-scale home renovation projects and smaller tasks, and every time, the work has been exceptional...."
Dominic Mathieu-Peters
"Gerardo came and did the quote and explained every step that would be required to get the job done properly. The work was very thorough and professional. The finish work that Gerardo and his employees do is incredible. Very fairly priced and very professional...."
Jack Rogers
Getting Started is Simple
Request Your Free Estimate
Fill out the form or give us a call. We'll get back to you promptly to understand your project and schedule a visit.
We Assess & Quote
We come to you, assess the scope, and provide a clear, honest quote. No pressure. No hidden costs. Every project is unique and priced accordingly.
We Build. You Love It.
We get to work — on time, on budget, and with the quality you deserve. When we're done, you'll see why our clients keep coming back.
Request Your Free Estimate
Fill out the form or give us a call. We'll get back to you promptly to understand your project and schedule a visit.
We Assess & Quote
We come to you, assess the scope, and provide a clear, honest quote. No pressure. No hidden costs. Every project is unique and priced accordingly.
We Build. You Love It.
We get to work — on time, on budget, and with the quality you deserve. When we're done, you'll see why our clients keep coming back.
Answers Before You Ask
Yes. All project estimates are completely free with no obligation. We assess your space in person and provide a quote based on the actual scope of work.
We serve London and approximately a one-hour radius, including Sarnia, Chatham, Strathroy, St. Thomas, Grand Bend, Kitchener, and Guelph. Not sure if you're in range? Give us a call — we're happy to confirm.
We specialize in flooring installation and custom carpentry, and we handle full home renovations, kitchen updates, basement builds, and interior finishing. We focus on quality residential and commercial projects — not small patch repairs or minor fixes.
We understand budgets matter. However, some elements of a project are required either by manufacturer installation standards or building code — removing them may compromise the result and, in some cases, will affect your warranty coverage. We'll always be upfront with you about what's essential and why.
We stand behind our workmanship with a 1-year warranty from the date of project completion. This covers defects in our work and installation. It does not apply to normal wear and tear, misuse, or circumstances outside of our control. We use quality materials and build things properly — so warranty claims are rare.
Every project is different. What we can promise is transparency — we explain what you're getting, what materials are being used, and why. We are a family business and we ensure your investment is spent making your space spectacular at a fair price.
Yes. While most of our work is residential, we take on commercial projects as well. Contact us to discuss your scope.
Still have questions?
Get in TouchRequest Your Free Estimate
Tell us about your project and we'll get back to you within one business day. Prefer to talk? Call or email us directly.
Reach Us Directly
(226) 212-6457
Available Monday – Friday, 8am – 5pm
info@gsacustomcarpentry.ca
We respond within one business day
Serving London, ON & Region
Sarnia · Chatham · Strathroy · St. Thomas · Grand Bend · Kitchener · Guelph & more