Renovation Contractor in Oshawa & Durham Region
Insurance Broker Partner Programme
When you send a client to Cornerstone after a loss, your name is on the line. We protect that trust — and keep you updated — on every claim we handle.
We check the full scope of your client's loss to make sure nothing is missed. If there's a gap, we find it and put it in writing before the work starts.
Every report we build is ready for a formal claim review. If the file ever goes to dispute, your client already has the paperwork they need — done right the first time.
One team handles everything — the scope, the estimate, the rebuild, and the updates. You don't chase anyone, and neither does your client.
A bad claim can cost you a client. We make sure the experience is smooth and professional, so the trust your client has in you stays right where it belongs.
Insurance Broker Partner Programme
Send your client to a contractor you can stand behind. We document the full loss, restore the home to code, and keep you updated the whole way. No cost to you. No risk to your name.
Rooted in Durham
When the big restoration chains roll out after the work is done, we're still here. When you refer Cornerstone, you're sending your client to someone who's part of the same community you serve.
I was born and raised in Bowmanville and have lived in Durham Region my whole life. This isn't a territory I service. It's home.
I've been building in Durham for over 35 years. My family's roots here run even deeper.
Cornerstone is a family owned and run business. When you send us a client, you're trusting a local family — not a national chain.
What This Protects
When you send a client to Cornerstone, you're not just passing along a name. You're protecting your client, your reputation, and the file.
Your client gets a calm, professional team that handles the loss from start to finish. The hardest part of their year is made easier — because you sent them to us.
A bad claim can cost you a client. We make sure the work is done right, so the trust your client puts in you only grows. You look good because we do good work.
We document the full loss clearly and to code. If the claim is ever questioned, your client already has the paperwork they need — and you're never left explaining a gap.
In short —We don't pay you to refer. We protect the client you sent us, so the relationship you built stays yours. That's the whole deal.
Verified Google Reviews
"Dreams do come true. Mike and his team successfully transformed the kitchen into a stunning space. Their expertise and professionalism are reflected in the quality of their work."
"We couldn't be happier with our kitchen renovation. Cornerstone Construction handled everything professionally from start to finish. The quality of the cabinetry and tile work is top-notch. Highly recommend for any home project."
"Mike completed a large renovation for us in Durham Region. The project was well done — the attention to detail really makes it stand out. Mike spends all of his time working on your project which makes it extremely easy to meet and review as it evolves."
Optional services your client can choose — at no cost to you
A quick written review of your client's loss, usually one to two pages. We check the scope and flag anything that looks missed — a fast first step for smaller claims.
A complete, detailed written report on your client's loss — the same careful review we build for major claims. Credited back if your client hires Cornerstone for the restoration.
Our most complete review: the full report plus a priced estimate, matched line by line to the carrier's scope. Built for a formal claim review (Statutory Condition 11). Credited back if your client hires us for the rebuild.
A no-cost call where we walk through your client's loss together before anything else begins — the simplest way to start.
Broker Case Study
A Durham Region water loss damaged three levels of a home. Before accepting the carrier's rebuild settlement, the homeowner asked Cornerstone for an independent review of the scope.
~$60,000
in code, labour, and line-of-sight rebuild scope the original estimate did not include — every dollar itemized and tied to a code section, an IICRC standard, or the policy's own basis-of-settlement language. Nothing padded.
And we corrected a charge in the carrier's favour — a double-counted vanity that brought one room's figure below the carrier's number. The goal is an accurate file, not a bigger one.
Broker Partner FAQ
Common questions from the insurance brokers we work with across Durham Region and the GTA, about our restoration and referral process.
Currently am undergoing an insurance claim to get home restoration completed and reached out to Mike at Cornerstone Construction to assess and provide a complete proposal for the scope of work. Mike has been fantastic to work and communicate with. He is extremely detailed and meticulous. Proposal provided in-depth itemized line items for every restoration task. Everything was black and white with no room for confusion. Mike also has been instrumental in helping negotiate with the insurance company. He knows all the construction codes and laws in detail and was able to assess my insurance policy too and suggest justifiable factual counter arguments for the insurance company negotiation. Highly recommend to consult Mike at Cornerstone Construction before taking a final decision on a home restoration/renovation project.
Meet the Owner
The builder who answers is the one accountable for every client you refer. Book 15 minutes and see how we protect your name.
From the Founder
"When a broker sends me a client, they're handing me their reputation. I protect it like it's my own — and I make sure their client is taken care of from the first call to the final walkthrough."
— Mike Brock, Founder, Cornerstone Construction
Durham Region's trusted renovation contractor. Led by Mike Brock since 2017. We Listen, We Build, We Deliver.