Renovation Contractor in Oshawa & Durham Region
The Cornerstone Certainty Stack
When we hand you the keys, we also hand you the full story of your home — every finish, every document, and every care guide in one place. We call it the DNA of your renovation. It's how we keep "We Deliver" going long after the last tool is packed up.
The Cornerstone Owner's Manual is the complete record of your renovation. Most builders hand you a stack of receipts and wish you luck. We hand you a full, organized manual — part record book, part care guide, part warranty — so you never have to guess how to look after the home you just invested in. Here's what's inside, and why each part matters to you.
Every paint colour, every tile, every fixture you chose — written down and saved.
Why it matters: Three years from now, when you need a touch-up or want to match a finish, you won't be guessing. The answer is already on the page.
Simple, plain-language guides for your cabinets, counters, floors, tile, paint, and fixtures.
Why it matters: Premium finishes stay beautiful when they're cared for the right way. These guides show you exactly how, so your home keeps looking new.
Your full workmanship warranty, plus the simple steps to request service if you ever need it.
Why it matters: You'll always know what's covered and exactly who to call. No fine print to hunt for — it's right there when you need it.
Permits, inspection records, drawings, and your appliance details — gathered in one safe spot.
Why it matters: These are the papers you'll need for home insurance and the day you sell. Having them ready protects the value of your home.
Your online portal stays open — every photo, file, and record from your build, saved for good.
Why it matters: Your renovation story is preserved. Look back at the progress photos or pull up a record anytime, from your phone.
A season-by-season checklist of the small things that keep a home running smoothly.
Why it matters: A few simple habits each season prevent the big, costly problems later. We map them out so nothing gets missed.
You get both. At handover we give you a complete Cornerstone Owner's Manual — a real, organized record of your home — plus a digital copy. It's yours to keep.
Your online project portal stays open after the job is done. It holds your progress photos, files, and records, so even if the paper copy goes missing, your full history is saved and easy to reach from your phone.
You won't have to guess. Your Owner's Manual lists the exact paint colours, tiles, and fixtures used in your home, so you or any store can match them perfectly down the road.
The biggest thing is keeping your indoor humidity in a healthy range and avoiding things like steam mops on your floors. Your Owner's Manual spells out the simple do's and don'ts in plain language, so protecting your coverage is easy.
Tiny cracks where trim meets the wall are normal — they come from your home settling and the seasons changing, not from poor work. Your Owner's Manual explains what's normal and how to do a quick touch-up, so there are no surprises.
Yes. Permits, inspection records, and drawings are often asked for when you renew your home insurance or sell your home. Having them organized and ready protects your home's value.
Our 5-year warranty covers our workmanship — how things were built and installed. The product itself, like a faucet or an appliance, is covered by its maker. Your Owner's Manual makes the difference clear and tells you exactly who to call for what.
A renovation is one of the biggest investments you'll make in your home. The Cornerstone Owner's Manual is how we help you protect it — so you always know how to care for your space, where your documents are, and that we're standing behind our work. That's what "We Deliver" really means.
Durham Region's trusted renovation contractor. Led by Mike Brock since 2017. We Listen, We Build, We Deliver.