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Typical your area range for this kind of work, from regional averages — not a quote from Isa Construction. Use it to sanity-check bids, then get the real number in writing.
A square is 100 sq ft of roof surface — bigger than the floor plan because of pitch and overhangs.
Estimated range
$9,000 – $18,600
Typical roofing project around $13,800
Isa Construction is a Danbury outfit that does roofs, siding and gutters and a good deal of everything else around the house, and its Google page shows 5 stars from 19 ratings. Thumbtack shows 4.8 stars from 26 ratings. The newest job is a July 2026 Google review: the customer said the company gave a preliminary estimate from a visual inspection, was upfront that the final cost could change once the wall was opened, then updated the quote with photos and a clear description of the work. An April 2026 reviewer said Gabriel and his team did roof and gutter work. In a March 2026 review, a customer said Gabriel Calle ran a siding and gutter job on a new addition and the price was fair with no surprises. The older reviews show the range. A November 2025 customer said Darwin and the crew repaired a leak in a kitchen ceiling and later prepared a large deck for winter. In a July 2025 review, a customer described full interior painting, a privacy fence, basement flooring and chimney and ventilation repairs. A May 2025 reviewer said the front porch and rear deck were completely redone, and a February 2025 customer said the company helped them get a new roof through insurance for just the deductible. In a May 2023 Thumbtack review, a customer said the project started on the wrong foot over a miscommunication, and the crew got it back on track. The company says it offers free estimates and lists Fairfield, Litchfield and New Haven counties as its area. Its Connecticut HIC licence, HIC.0699468, is active. The Better Business Bureau rates it A+.
Quality work, answered all questions, good materials, clean up, perfect, courtious, well satisfied!
Great. They contacted me within a week and came on-site to provide a preliminary estimate, which ended up being very accurate based just a visual inspection. They were upfront and honest that the final cost could change once the wall was opened up. The estimate was detailed, including a clear description of the work to be performed with photos. Once the project was underway, they updated the final quote based on what they found, kept me informed throughout the process, and were patient with my scheduling. Always kept in contact with scheduling and status of project. Will hire again.
Great job by Gabriel and his team, outstanding work, friendly, and efficient. Definitely will happily recommend to others. They did roof and gutter work.
This team exceeded our expectations, the work performed was excellent. They were reliable, communicative, polite , professional and the outcome of the project was better than we had expected. Gabriel was in control at all times, and was very easy to work with. I recommend this company to anyone, you will not be disappointed.
Hired ISA to do siding and gutters on a new addition and replace old gutters. Gabriel Calle ran the job and was very responsive and did an excellent job in communicating any issues. The crew did excellent work and were on time, clean and answered any questions I had. The final product looks great. The price was very fair and the team was very transparent throughout the process. There were no surprises, I will use them again and I highly recommend them.
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1 change recorded — last scanned Oct 13, 2026.
Copper gutters re-pitched instead of replaced5.0
Help navigating the roof insurance claim4.5
Roof leak fixed the next morning4.5
Roof, siding and windows done as one exterior job4.4
Two semi-flat roofs replaced in one day4.2
11 years in businessNot yet rated
No leaks after roof replacement4.1
Roof and siding job finished on schedule4.0