More window, siding & gutter contractors
See all ›GN Exteriors - Roofers in Braintree
4.6178 reviews
Boston Doors and Windows
4.648 reviews
Quality Window & Door Inc
4.5426 reviews
Local business · Milton, MALocal business · 23 Bunton St., Milton, MA
Verified record
John B Costello works out of 23 Bunton St in Milton, and what sits on file is paperwork and permits. BuildZoom lists a Massachusetts home improvement contractor registration, number 135706, issued on 1 May 2026 and recorded as active as of July 2026, alongside 17 permitted projects. That registration is the directory's record rather than a registry confirmation. Ask him for the number directly and check it with the state, and ask for two or three recent references and photographs of finished work before you commit.
Specializes in
Typical Greater Boston range for this kind of work, from regional averages — not a quote from John B Costello. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$4,000 – $11,000
Typical exterior project around $7,500
Also offers
Languages
No changes recorded yet — last scanned Aug 2, 2026.
4.6178 reviews
4.648 reviews
4.5426 reviews