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Typical Greater Boston range for this kind of work, from regional averages β not a quote from GANNON PATRICK J CONSTRUCTION. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$23,000 β $35,000
Typical remodeling project around $29,000
Patrick J. Gannon Construction has a long South Shore track record in additions and remodeling. Angiβs older customers described clean workmanship, useful suggestions, prompt communication, and projects completed ahead of schedule; one 2002 homeowner said a project was usable in two and a half months rather than the four months quoted and was on budget. BBB lists the company in Cohasset with an A+ grade and 30 years in business. Its stated work includes general contracting, remodeling, additions, garages, decks, windows, doors, roofing, and kitchen and bathroom remodeling; Angi lists a 4.0 rating from 10 ratings, while BuildZoom lists 41 projects and a Massachusetts Home Improvement Contractor number. The detailed customer accounts are all old, dating from 2002 through 2010. They are positive about work quality and communication, but one 2003 review wanted a clearer project timeline and one 2002 review mentioned telephone-tag calls, so ask how scheduling and progress updates are handled today. This is a South Shore general contractor for additions, room remodeling, decks, and related exterior work. Confirm the current address, license status, scope, schedule, and references in writing before booking.
They were prompt, professional and courteous. We are very pleased with our new room.
Very professional, clean. Great workmanship and attention to details. Good communication. Would highly recommend Patrick Gannon for any type job. The dormer on our cape is beautiful and beyond our expecting.
Thq quality of the work is superior! They came up w/ solutions we would've never thought and it looks great. If this was combined with an excellent project communication plan so I knew what was happening when, then the team would be unstoppable. Would definitely use again but would insist on sitting down and mapping the project time line first. (For my own comfort)
There were a couple of telephone tag calls; but, for the most part this company exceeded my expectations. I definitely would use this company again!
He stands by his work. With every construction project there are unexpected issues. He was a good listener and was very helpful. Good communication is one of his strongest attributes.
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1 change recorded β last scanned Sep 17, 2026.
Decks and porches5.0
Clients returning for 10 and 20 years5.0
Detailed craftsmanship5.0
Renovates century-old structures5.0