Renovation Contractor in Oshawa & Durham Region
Every Project. Every Time.
Eight guarantees that protect you from the first day to long after the last. This is how we turn "trust me" into something you can hold in writing — the promises behind "We Listen, We Build, We Deliver."
One Symbol, Eight Promises
Every guarantee below is backed by the same crest — the price lock, the on-time penalty, the daily cleanup, the 5-year warranty, and the rest of what makes "trust me" something you can actually hold in writing.
Anyone can say they're different. We decided to prove it — with eight specific, written guarantees that cover the things homeowners worry about most: the price, the timeline, the mess, the communication, and what happens after we're gone. Tap any guarantee below to see exactly how it works.
Your price is locked before we start. No surprise bills. Ever.
Learn more →Miss your completion date and we pay you $300 for every day we run late.
Learn more →Hospital-grade air scrubbers and sealed dust walls keep your home clean throughout.
Learn more →We reset the site every day before we leave, so your home stays livable.
Learn more →Track progress, approvals, and documents anytime through your live project portal.
Learn more →Every job is backed by a full 5-year workmanship warranty — five times the standard.
Learn more →At handover you get a complete manual — finishes, documents, warranty, and care guides.
Learn more →A fully licensed and insured Ontario corporation. WSIB compliant. Ask for proof anytime.
Eight guarantees, working together, so you always know where your project stands and what we stand behind. That's what makes a renovation with Cornerstone different — and it starts with one honest conversation about your project.
Durham Region's trusted renovation contractor. Led by Mike Brock since 2017. We Listen, We Build, We Deliver.
