O'Sullivan Home Improvement

O'Sullivan Home Improvement is a one-owner carpentry and exterior contractor in Centerville, run by Ryan O'Sullivan and doing business on the Cape for at least seven years. Reviewers hire him for decks, windows, siding, doors and trim work — the Better Business Bureau lists additions, bulkhead replacement, decks, door and window replacement, siding, roofing and trim among the services offered. The word that comes up again and again across eighteen five-star Google reviews spanning 2021 through 2025 is meticulous. Customers describe careful, detail-oriented carpentry — new cedar shingle siding and windows, a rebuilt deck with mahogany boards and railings, replaced sliding doors and picture windows, front stairs and a shed ramp, decorative shutters — paired with fast responses and a detailed, itemized quote before work starts. Several reviewers mention going back to him for a second project after the first one went well, and a 2025 review of a new outdoor shower said the job took a little longer than expected but was worth the wait. The state registry shows a wrinkle worth asking about before booking: O'Sullivan's Massachusetts home improvement contractor license, number 203230, is currently listed as expired. The Better Business Bureau separately lists a second license number, CS-115091, issued by the state's Office of Public Safety and Inspections and expiring in October 2026 — worth confirming which licenses are current before signing a contract. The BBB otherwise gives the business an A+ grade, though it is not a BBB-accredited member. For a Cape Cod homeowner who needs carpentry, deck, window, siding or trim work done carefully by the same person each time, O'Sullivan's review history is unusually deep and consistent — just confirm the license status directly before hiring.