Renovation Contractor in Oshawa & Durham Region
Most contractor websites exist to get you to call. This one exists to save you the call if we're not the right fit. Below is what we do, what we don't do, and who we work best with. You'll know if we're a fit before you call.
You don't want to coordinate the electrician, the plumber, the drywaller, and the painter yourself. You want one person responsible for the schedule, the communication, the quality, and the result. That's the real product — one contract, one point of contact, one accountable team.
Cornerstone runs full-scope projects — one contract, one point of contact, every trade and permit managed under our roof. Your Project Diagnostic turns that range into a fixed price.
Full gut renovations to layout changes — cabinetry, counters, electrical, plumbing, all under one contract.
Full remodels, tile-to-ceiling, plumbing relocations, custom showers and vanities.
Legal suites, in-law suites, recreational basements — permits, egress, and fire separation handled.
Multi-room, multi-trade projects — kitchen, bathrooms, main floor, and beyond, under one schedule.
Office, retail, and restaurant builds. Commercial-grade project management, brought to your business.
Water, fire, and mould rebuilds. We document the damage and build the scope — you deal with your insurer, not us.
This isn't about job size or job type — we've priced work as small as a one-day repair. It's about how the work gets done.
Two columns. Read the right one first.
Five steps. You always know what's happening, what it costs, and what comes next. See the full breakdown on Our Process & Standards.
We walk your space and listen to what you actually want the project to do for you.
A detailed roadmap, timeline, and transparent budget — for your approval before anything is ordered.
We help you choose materials for your budget and style. Everything is ordered and staged before we start.
Skilled trades execute with precision. You get updates the whole way through — not just at the end.
A rigorous walkthrough before you enjoy the space — plus your Owner's Manual at handover.
The questions people ask before they call.
Ask them straight what they don't do, not just what they do. A contractor who's honest about who they're not a fit for is usually honest about the rest too. That's the whole point of this page.
Yes — job size isn't the filter. We've priced work as small as a one-day beam repair. What we won't do is a rushed, corner-cut, or band-aid version of the work at any size. Ask us — we'll tell you straight whether it makes sense for us to take it on.
Because a number without seeing your space is a guess, and guesses are exactly why renovation prices change halfway through. Your free Project Diagnostic is how we turn a guess into a real, locked price.
Yes — both, under the same project-management standard. Office and retail fit-ups run on the same locked-price, written-schedule discipline as a kitchen or basement. See Commercial Services.
Smaller projects still get the Price Lock Guarantee, daily cleanup, and our 5-Year Warranty. The $300/Day On-Time Guarantee and Owner's Manual apply to projects of 20 working days or more and $15,000 or greater — where a penalty clock genuinely makes sense. See all eight guarantees on The Cornerstone Certainty Stack.
Then we tell you on the first call. A mismatched project costs you time either way — better to find out in twenty minutes than three weeks into a conversation.
Start with your free Project Diagnostic. We'll assess your space, scope the work, and give you a fixed price before we start — no guessing, no ballpark numbers. Curious why our number is usually higher than the other quote? Read Why We Aren't the Cheapest.
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Durham Region's trusted renovation contractor. Led by Mike Brock since 2017. We Listen, We Build, We Deliver.
