About Cornerstone Building Group
Based in Mississauga, Cornerstone Building Group is a professional general contractor serving the local area. They maintain a 4.8★ Google rating across 21 reviews.
Trust Score based on 2 of 4 platforms. WSIB coverage confirmed.
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Google Review Breakdown
21 totalFeatured Review
Verified review from Google
We had the pleasure of working with Heiner from Cornerstone Building Group for a exterior renovation of our home, and we couldn’t be happier with the results. A few years ago, we saw some of his residential work in our neighborhood, and when it came time for our own project, we knew we wanted to reach out. From the start, Heiner was extremely friendly, polite, and professional. He took the time to listen to our ideas, provided a clear and fair quote, and always gave us options without ever pres
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