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Local business · Milton, MALocal business · 23 Bunton St., Milton, MA
Verified record
John B Costello is a Milton home improvement contractor whose Massachusetts home improvement contractor license, #135706, is active and registered to John Costello. BuildZoom lists 17 projects for the company and the same license number. Confirm project scope, timeline, and proof of insurance directly before booking.
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
Specializes in
Also offers
Languages
1 change recorded — last scanned Aug 2, 2026.
Soundproofing jobs4.9
Quote to finished in one day4.4
Drone estimates4.2
