Cornerstone Construction

General Contractor, Waterproofing, Drywall Installation & Repair

804 Ritson Road South rear unit, Oshawa, ON L1H 5L4

About Cornerstone Construction

Cornerstone Construction is dedicated to turning client visions into reality through exceptional craftsmanship and service. Clients have praised the company's attention to detail, professionalism, and quality of workmanship. A recent large renovation project in the Durham region showcased the team's commitment, with a focus on communication and collaboration throughout the process. Mike, a key member of the team, is noted for spending all his time on projects, making it easy for clients to stay involved and informed. His knowledge and guidance have been particularly helpful, providing clients with templates and ideas for their renovations. Additionally, the company is recognized for handling projects like garage ceiling repairs with expertise and thoroughness. Overall, clients have expressed satisfaction with their experiences, highlighting the strong work ethic and dedication to delivering quality results at Cornerstone Construction.

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Reviews for Cornerstone Construction

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  • Jun 2025

    Project 1007 -
    Mike completed a large renovation for us in Durham region,
    The project was well done, the attention to detail really makes it appear well done.
    Mike spends ALL of his time working on your project which makes it extremely easy to meet and review the project as it evolves.
    We went ahead and created a finishes list to allow for proper ordering and timing, Mike also gives you a great template to start from, along with ideas on his original scope of what he would do or install. We found this helpful.

    Overall a good experience,

  • May 2025

    I was very impressed with the quality of workmanship and customer service provided by Cornerstone Construction. Mike was very professional and knowledgeable fixing my garage ceiling water damage and identifying the cause of the leak. He was excellent at keeping me in the loop and involved in the process. I would definitely hire them again.

    Tasha Machin

  • Dec 2024

    I am so impressed with the quality of work and professionalism of this company. Right from the beginning Mike was very responsive - coming to my home to really understand what needed to be done to give me the results I wanted within my budget and making recommendations to maximize the space. I highly recommend this company for any project.

Hours

Monday: 8AM - 5PM
Tuesday: 8AM - 5PM
Wednesday: 8AM - 5PM
Thursday: 8AM - 5PM
Friday: 8AM - 4PM
Saturday: ClosedSunday: Closed

Location

804 Ritson Road South rear unit, Oshawa

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