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Cape Cod Cornerstone describes itself as a Harwich custom stonework contractor building chimneys, stone fireplaces, patios, walls, pool copings and outdoor kitchens across Cape Cod. Its website says Seth Campeau and his team have done custom stonework on Cape Cod for over 20 years. A 2023 customer said Cornerstone built an entire fireplace wall inside their home, with every stone hand cut on site and fit in place. That 2023 customer said they were then working with Cornerstone on their backyard, including a new raised patio, pool surround, outdoor kitchen and lighting. A 2025 customer wrote that one of their buddies who works for the company did decorative stone work on the foundation of their house. A 2025 customer said they sent owner Seth the photos and project details he asked for ahead of a quote, gave their availability, and he never responded or met them at the property. A 2025 reviewer said a Cornerstone truck rode their tail on Route 6 toward Hyannis and Barnstable.
“Stone Mason Cape Cod Cornerstone”
The work they provide is excellent one of my buddies works for them and did some decorative stone work on the foundation of my house looks awesome
I was driving down Rt 6 toward hyannis/barnstable and all of a sudden a cornerstone truck with the license plate, W79-253 comes up right behind me and rides my tail, any closer and he would have been in my backseat.. so I get in the slow lane, and the cornerstone truck flies by me, I got into the fast lane behind him and did 78 mph to catch upto the truck to get the license plate... so he was going much faster than that!!!!
I contacted Cornerstone for a quote on a project last year. I exchanged several emails with the owner Seth. Before coming out to meet with me, he asked me to provide details of the project and to send him photos in advance. I took the time to take the requested photos and send him a detailed explanation of what I was looking for. He replied asking if I would be available in the next few days, to which I provided my availability. He never responded and never followed through with meeting me at the property. If he wasn't interested in the project or wasn't able to take on additional work, he should have said so. Just a waste of time.
The team at Cape Cod Cornerstone, led by owner Seth, not only do beautiful work but they listen, engage in idea sharing and care. We first partnered with Cornerstone a few years ago to build an entire fire place wall in the interior of our home. Every single stone was hand cut on site and fit in place. It is now the centerpiece of our home. We are currently working with the Cornerstone to reinvent our backyard including a new raised patio, pool surround, fire fit, outdoor kitchen and lighting. The entire team, not just the owner, care about quality as much as we, the homeowners, do. I would recommend Cornerstone to friends and family without hesitation.
Can’t say enough about the positive experience we had with Cape Cod Cornerstone, owner Seth and his crew. Not only is their work professional, creative and beautiful, they are such kind, respectful and responsive folks. They go above and beyond to resolve all questions and concerns. If you are considering a project requiring stonemasons, look no further. Rest assured, you will be in good hands.
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2 changes recorded — last scanned Sep 30, 2026.
Pool installation with permitting handled3.7
