Construction Company in Northumberland County, ON
Northumberland County Construction
Our Home Territory Since 1999
Custom homes, renovations, additions, and commercial construction serving communities across Northumberland County. Local crew, all trades in-house, 25 years of accountable work.
25+
Years Experience
100+
Projects Completed
1Team
Start to Finish
4.8★
Google Rating
Northumberland County, Ontario
We’ve built across every corner of Northumberland County for 25 years.
Seven municipalities, one county, and twenty-five years of building across all of it. Cobourg, Port Hope, Brighton, Cramahe, Hamilton Township, Alnwick-Haldimand and Trent Hills.
Each one issues its own building permits with its own timelines, and the differences matter. Cobourg and Port Hope both carry heritage requirements in their downtown cores. Brighton requires BCIN-prepared drawings. Rural townships bring septic, wells and setbacks into almost every project.
The septic point catches people out. Northumberland County issues septic permits, not the individual municipalities. If your property is on septic and your addition adds a bedroom, you are likely looking at a septic review alongside your building permit, from a different office. We handle both applications rather than leaving you to discover the second one halfway through.
We are based at 3 Coronation Crescent in Cobourg. The crew lives here, the suppliers are local, and there is no address in this county we treat as a travel job.

Recent Work
Our Services in Northumberland County
Everything we build in Northumberland County

Est. 1999
Serving Northumberland County
Why Cobourg Construction
Local team. Local trades. 25 years of accountable work.
We’re based in Cobourg and serve all of Northumberland County and surrounding communities. One point of contact from first call to final walkthrough. No hand-offs, no surprises on your invoice.
We built this business on referrals. Every project we take on reflects our reputation in this region. That’s why we do it right the first time, every time.
Frequently Asked Questions
Which communities in Northumberland County do you serve?
All of them. Cobourg, Port Hope, Brighton, Colborne, Grafton, Baltimore, Campbellford, Warkworth, Hastings and the surrounding townships.
Are you a local builder or do you travel in?
Local. We are based at 3 Coronation Crescent in Cobourg, the family has run the business here since 1999, and the crew lives in the county.
Do permit requirements differ across Northumberland County?
Yes. Each municipality issues its own building permits, so Cobourg, Port Hope, Brighton, Cramahe, Hamilton Township and Alnwick-Haldimand each have their own department and timelines. Septic permits are issued by Northumberland County rather than the municipality, so rural properties often need both.
Ready to build in Northumberland County?
Call us or fill out the form. We’ll get back to you same day.