Cornerstone Construction horizontal lockup logo

Let's Talk About Your Project

We serve Durham Region and the broader GTA. Free walk-through. Written estimate. No obligation.

Professional service guaranteed across the Durham Region and Greater Toronto Area.

Get in Touch

Ready to start your next project? Reach out to us using the details below or fill out the form to request a consultation.

Call Us

647-521-7383

Business Hours

Monday to Friday 7am to 6pm.
Saturday by appointment.

Service Area

Oshawa, Whitby, Bowmanville, Clarington, Ajax, Pickering, Newcastle, Scarborough, Stouffville, Peterborough

Durham Region's trusted renovation contractor. Led by Mike Brock since 2017. We Listen, We Build, We Deliver.

Service Areas

  • Oshawa, ON
  • Whitby, ON
  • Bowmanville, ON
  • Clarington, ON
  • Ajax, ON
  • Pickering, ON
  • Newcastle, ON
  • Scarborough, ON
  • Stouffville, ON
  • Peterborough, ON
© 2026 Cornerstone Construction Inc. All rights reserved.
Privacy PolicyTerms of ServiceCode of EthicsEditorial StandardsAI Disclosure