Home Renovation Contractor in Oshawa & Durham Region
One contractor for the whole job — main-floor and full-home renovations run as a single coordinated build. One team, one contract, one point of contact, from the first site meeting to the day we hand back the keys.
A Renovation Contractor You Can Actually Trust
When you hire a home renovation contractor in Oshawa, you're trusting one person to run the whole job — the trades, the schedule, the budget, and the standard everything is held to. That's exactly what Cornerstone Construction does. We're a licensed, insured renovation contractor serving Oshawa and Durham Region, and we run every project as one coordinated build: one team, one contract, one point of contact.
Whether it's a single main floor or a full home taken back to the studs, the standard never changes — Level 4 drywall, daily cleanup, a locked price, and a 5-year workmanship warranty backed by a full Owner's Manual at handover. No subcontractor runaround, no surprise invoices. Just renovations done right, the first time.
Recent Work
Renovations Across Durham Region
Real homes, rebuilt to one standard — main floors, whole homes, and full condos across Oshawa, Whitby, Bowmanville, and Courtice.
Why Durham Region Homeowners Choose Us
We Show Up
Mike Brock or a named supervisor is on your job every day. You always know who's in charge and how to reach them.
One Contract
One team manages every trade and every stage. No subcontractor runaround, no finger-pointing — one point of contact start to finish.
We Lock Your Price
Your quote is your price. No surprise invoices, and no change orders without your written approval.
We Back Our Work
Every renovation carries our 5-year workmanship warranty and a full Owner's Manual at handover.
"Mike was the most professional and punctual contractor I have ever worked with. He understood how to bring my 10-year vision into reality. If it is not straight then it is not correct. He will make sure that it is. He will now be the only contractor to touch any part of my house."
Ready to Start Your Renovation?
Book a free Project Diagnostic and get a clear, fixed-price plan from a contractor who runs the whole job — start to finish, with no surprises.
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