WHAT WE BUILD
Our Services
Our Work
Built right.
Every time.
The Merson Family Story
A family name.
25 years of work
behind it.
The Merson family started Cobourg Construction in 1999 with a straightforward goal: build homes and renovations the right way, stand behind the work, and treat every client like a neighbour, because most of them are.
We now run a team of 50 across custom home builds, additions, renovations, and commercial projects. Second generation is running the business. The values haven’t changed.
Where We Work
Serving Northumberland County & Eastern Ontario
Professional construction services across 8+ communities in Eastern Ontario
What Our Clients Say
Trusted by Homeowners
Across Northumberland County
“Don, Liam, Austin and their crew completed a kitchen renovation and wall tear-down for us. The work was top-notch and they were great to work with. No hidden surprises! Just honest, quality work from a local small business.”
Nick Jardine
Kitchen Renovation · 4 years ago
“Don and his boys, Austin and Liam just finished our kitchen reno and they did a fantastic job! All three are very picky on their workmanship and are wonderful to work with. We are already planning our next project with them!”
Brian Harper
Kitchen Renovation · 7 years ago
“Many thanks and much gratitude for all the people inside the company that made my beautiful new ADU into the home that I love every day… This is a company with integrity and heart. These are the people that you really can count on.”
Margaret Coffey
ADU Build · a week ago
“Liam and Austin installed a new kitchen and two new vanities for us, including tile work and flooring. We couldn’t be happier. We have an old house, where nothing is square. They made it look right despite this huge obstacle!”
Derek Volling
Kitchen & Bathroom · 5 years ago
“Don, Liam and Austin did a great job renovating my main floor. Attention to detail. Turned out great! Bathroom and kitchen are amazing!”
Lara & Robert
Main Floor Renovation · 5 years ago
“Great collaboration and flexibility on kitchen and main floor renovation project. High quality work, done right.”
Justin Hobart
Kitchen & Main Floor · 2 months ago
HAVE QUESTIONS?
Frequently Asked Questions
Answers to the most common questions about custom home builds, renovations, and working with Cobourg Construction & Renovation.
What areas does Cobourg Construction & Renovation serve? +
Cobourg Construction & Renovation serves Northumberland County and Eastern Ontario, including Cobourg, Port Hope, Peterborough, Clarington, Brighton, Belleville, Trenton, and surrounding communities. Since 1999, we have completed projects across 8+ cities in the region. Contact us for a free estimate anywhere in our service area.
How much does a home addition cost in Cobourg, Ontario? +
Home addition costs in Cobourg and Northumberland County typically range from $150 to $350+ per square foot depending on the complexity, materials, and finishes involved. A second-storey addition or large main-floor extension will sit toward the higher end. Cobourg Construction provides detailed, transparent estimates so you know exactly what you are paying for before any work begins.
Is Cobourg Construction & Renovation licensed and insured? +
Yes. Cobourg Construction & Renovation is fully licensed, insured, and WSIB covered. We have been operating as a professional design-build contractor since 1999. Our credentials protect homeowners throughout every stage of the project, from permits and planning to the final walkthrough.
How long does a kitchen renovation take in Eastern Ontario? +
A typical kitchen renovation in Eastern Ontario takes 3 to 8 weeks depending on the scope of work, cabinet lead times, and permit requirements. A full kitchen gut-and-rebuild with custom cabinetry will take longer than a cosmetic refresh. Cobourg Construction provides a clear project schedule before starting so there are no surprises.
What is a design-build contractor and why does it matter? +
A design-build contractor handles both the design and construction of your project under one roof. This means a single point of accountability, faster timelines, and tighter budget control compared to hiring a separate architect and general contractor. Cobourg Construction has operated as a design-build firm since 1999, managing every project from first sketch to final walkthrough.
Do I need a permit for a home renovation or addition in Northumberland County? +
Most structural renovations and all home additions in Northumberland County require a building permit through the Municipality of Port Hope, Town of Cobourg, or the relevant township. This includes additions, garage builds, basement finishes with structural changes, and deck construction. Cobourg Construction handles the permit process on your behalf as part of every project.
What is a custom home build and how does the process work? +
A custom home build means constructing a home from the ground up on your lot, designed specifically for your family and lifestyle. The process with Cobourg Construction starts with a consultation and site assessment, moves through design and permitting, then into full construction. We manage all trades, inspections, and materials, delivering a finished home built to your exact specifications across Northumberland County and Eastern Ontario.