Verified record
Nineteen other contractors came first. In a 2022 review, a homeowner wrote that they had gone through all nineteen before finding Kinsella Built — many said the job was too big or too small. Kinsella Built works out of Brookline and describes itself as a fully licensed and insured custom construction, remodeling, renovation and repair company serving the greater Boston area, with Boston, Brookline, Newton and Milton among the places it lists. The company says it has been at this for 20 years; Angi and HomeAdvisor put it at 22 years of experience and list the business as veteran-owned. The jobs customers describe tend to be the long ones. A 2023 review recounts a seven-month project: an addition, an open-concept conversion inside, and a finished basement. Another from 2023 covers a full gut remodel of a roughly 1,925-square-foot home, done in a little over five months from the initial quote, with the crew asking the owners for input on decisions along the way. A third 2023 account is a three-family modular passive house in Cambridge, built during COVID, where the company worked through the applications, permits, certifications and inspections needed to begin. Older houses and their bones show up more than once. A 2024 review covers a 1950s home that needed floor joists, plumbing, electrical and interior walls, with Jon explaining the process step by step. A 2022 homeowner had a rotted post replaced — the one holding up the back porch — then brought the team back for basement work. Three names recur: John, James and Grainne, with Ian and Greg named in a 2022 review as well. In a 2023 bathroom remodel the plumbing, electrical and tile subcontractors got their own mention, and a 2021 customer credited the plumbers, electrician and tilers by trade. Half a dozen reviewers land on the same thing — communication. A March 2025 homeowner whose bathroom came in on time and on budget described John as reachable through the whole project; a 2021 customer wrote that every question was answered promptly and that John kept them informed at every step. Two things to settle before you call. These are months-long projects run by a small named team, so ask where your job would sit in the schedule and who handles the day-to-day. On paperwork, BuildZoom lists Massachusetts home improvement contractor registration #196736 for the company — ask to see that registration and the insurance certificate with your contract. The written accounts run from 2020 into 2025, all of them five stars, and they lean heavily toward big whole-house work: additions, gut renovations, structural repairs, finished basements. If that is your project, this is a straightforward call — pin down the start date and your day-to-day contact in writing first.
We had a terrific experience. John was very helpful and responsive and we highly recommend using them.
John and his crew were amazing. We LOVE our new bathroom. I have nothing but good things to say. They were on time, in budget, and the result is fantastic. John was super communicative and reachable throughout the whole project. He responded immediately when we had questions or concerns. He was super straightforward with costs too, so there were not surprises. His crew was also very nice and respectful. I would absolutely use them again, and recommend them to everyone I know.
I couldn't have asked for a better team to help with my project! Grainne, John and James were incredible to work with. They supported us through every step of the way - very responsive, detail oriented and efficient. They offered their professional input while respecting our needs, and I really appreciate that they always had my best interest in mind. I was so impressed that everything stayed on schedule and completed in just 6 weeks (full kitchen and bathroom remodel, installed new floors, and repainted the whole apartment). This was my first home renovation and have heard that things rarely stay on schedule, so we were really lucky to work with Kinsella Built!!
Kinsellabuilt was amazing when working on our 1950s home that needed significant work (full floor joist, plumbing, electric, interior walls, etc.) We worked with directly with Jon who was fantastic, explaining the process to us ever step of the way and making an incredibly stressful situation significantly easier. The price was reasonable, and they were incredibly accommodating to our needs. We would 100% recommend them to anyone who needs work done on their home.
Kinsella Built was great! So good that we have recommended them to all of our friends (now that is a true testimonial of their work). Our job was significant. We put on an addition to the house, created an open concept inside and finished our basement. The entire job was 7 months. Yet each day they showed such work ethic; always showing up at 7AM and putting in a full day work. They were professional, created a very quality product, were reasonable and finished the job on time. You can't ask much more of that from a contractor. For all of our future construction products, we will be going with Kinsella. Thank you to James & John (and Ian, and crew) for their wonderful work. We love our "new" home!
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1 change recorded — last scanned Sep 11, 2026.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from KINSELLABUILT. 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
Languages
Languages
Ownership
Certified attributes are verified against the public registry. Others are the business's own statement.
Ownership
Certified attributes are verified against the public registry. Others are the business's own statement.
Decks and porches5.0
Clients returning for 10 and 20 years5.0
Detailed craftsmanship5.0
Renovates century-old structures5.0