O'Sullivan Home Improvement

While installing decorative shutters, Ryan O'Sullivan noticed the handle on a storm door was mounted upside down and fixed it — nobody had asked him to. That 2021 review is a fair introduction to how mid-Cape homeowners describe this Centerville outfit: a small crew working through window, siding, door and deck jobs, and catching the small things on the way past. The work described across 18 Google ratings averaging 5.0 is the exterior maintenance an older Cape house keeps generating. A 2021 homeowner had cedar shingles put on three sides along with new windows and a new white deck. In 2023 a couple had a window replaced with cedar clapboard and shingle siding; another had storm damage to a deck repaired. A 2024 customer doing two windows and siding singled out the quote — several project options, priced so they could target what fit their budget that year. A 2025 reviewer had deck railings and mahogany deck boards replaced, a year after O'Sullivan put up their gazebo. Elsewhere in the reviews: an outdoor shower, front stairs and a shed ramp, a bathroom floor, an Andersen storm door, and a sliding door and picture window that weren't standard size. What customers repeat most is how easy he is to reach. A 2023 reviewer said messages were answered within 24 hours; another that year said he replied the same day and slotted the job in within a week to ten days. A 2023 couple who were away while the work happened were sent progress photos. One caveat sits inside an otherwise glowing 2025 review: the outdoor shower took longer than the customer expected, though they said it was worth the wait. If your job has a hard date, nail the schedule down at quote time. The paperwork is the real thing to settle first. The Massachusetts home improvement contractor registration 203230, held by O'Sullivan Home Improvement LLC, is expired in the state registry. The BBB page — which grades the business A plus without accreditation and puts it at seven years under owner Ryan O'Sullivan — lists that same number alongside a construction supervisor licence CS-115091 said to run to October 2026, but that is the BBB's listing rather than anything confirmed at the registry. Ask to see a current registration certificate before any deposit changes hands.