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Twenty-two windows, a deck and a major house repair in 5 weeks: a recent Google customer says Mark and his team installed 22 new construction Anderson windows, built a deck and GC'd a major house repair within that time. On its Better Business Bureau page, Dennis Grappi Construction describes itself as a residential and commercial builder established in Massachusetts in 1980 with 4 employees, and names Dennis Grappi as Owner and Carpentry Supervisor. A 2025 customer said Mark replaced a large, old rotting bow window and another old window, and that no mess was left behind. A 2024 customer wrote that Grappi Construction walked them through vendors, brands, materials and layouts to renovate a full bathroom, laid out the cost and schedule, and met both. A 2023 customer said Mark had replaced rotted wood window trim with composite and repaired their deck. Its Better Business Bureau grade is A+, and it holds 5 stars from 5 Google ratings.
Mark and his team are amazing! They installed 22 new construction Anderson windows, built a deck for us, and GC'd a major house repair all within 5 weeks time! I would highly recommend Mark to anyone looking for a reliable, trust worthy, and communicative contractor!
Worked with Mark to have a large, old rotting bow window replaced as well as another old window in my house. He was always super communicative and honest. They also did a great job on the windows and didn't leave any mess behind at all. Will work with again and recommend.
Grappi Construction walked us through the vendors, brands, materials and layouts available to renovate one of our full bathrooms. Then they laid out the cost and schedule. In the end, they met cost and schedule. I'm glad we went with the more expensive tile and fixtures...the bathroom looks exquisite. My two points are, do not skimp on quality, and hire Grappi Construction. You'll be happy on both counts. Curt
I’ve used Mark a few times now on exterior work on my house. He’s replaced rotted wood window trim with composite and recently did some repairs on my deck. After using him a few times now, I honestly would not call anyone else. Mark is very honest and the work is very high quality!
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1 change recorded — last scanned Sep 22, 2026.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from Grappi and sons construction. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$23,000 – $35,000
Typical remodeling project around $29,000
Decks and porches5.0
Clients returning for 10 and 20 years5.0
Detailed craftsmanship5.0
Renovates century-old structures5.0
Repeat customers across multiple projects3.2
