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Local business · Charlestown, MALocal business · 50 Terminal St Bldg. 2, Suite 502, Charlestown, MA 02129, USA
Verified record
McGowan Custom Builders is a Charlestown-based custom residential builder and general contractor, working mid/high-end remodels and additions in the $100k–$1M range. Tim McGowan, who started the company in 2017, runs it day to day alongside a small team — project managers Kristina McKenna and Joe Giardina, and site supervisor Denny Diniz. A public building-permit tracker shows McGowan has filed 102 Boston permits since 2013, closing 65% of the 77 that have been rated — a rate the tracker puts 14.9 points above the city median. For a mid- to high-end remodel or addition in Charlestown, this is a contractor with an above-average permit-completion record and a small, named project team overseeing the work.
“Timothy McGowan has filed 102 building permits in Boston since 2013, closing 65% of 77 rated permits. 33 permits remain open. 14.9 points above the city median of 50.0%.”
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1 change recorded — last scanned Jul 4, 2026.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from McGowan Custom Builders. 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
Shoring within 48 hours of a tree strike5.0
Full bathroom renovations4.7
Kitchen and bath remodels2.7
State-verified Home Improvement Contractor license since 2026Not yet rated
Finish and trim work3.2
