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Typical Greater Boston range for this kind of work, from regional averages — not a quote from McWhinnie Custom Builders. Use it to sanity-check bids, then get the real number in writing.
A typical single-level deck is 12×16 — about 200 sq ft.
Estimated range
$7,750 – $14,500
Typical carpentry project around $11,100
McWhinnie Custom Builders works out of Medway, building and rebuilding the outdoor spaces homeowners actually use — decks, three-season porches, additions — under owner Joseph "Joey" McWhinnie, who spent 15-plus years with Carpenters Union Local 40 and years installing high-end millwork on Nantucket before starting the company in 2016. Its Massachusetts Construction Supervisor license, CS-114329, is active on the state registry. The deck and addition work carries the strongest specifics: a 2024 review describes a rebuilt three-season porch that took longer than hoped because of permitting but came out structurally sound and exactly as explained; a 2023 review details a screened-deck conversion where McWhinnie showed up at 8 AM daily and left the site clean each night; a 2022 review recounts him pushing a variance through the zoning board twice to land a pool deck. Kitchen work shows up too — a 2024 reviewer credits him with a kitchen and small addition done on budget — though it's a smaller share of the record than the deck and carpentry jobs. The written record runs from 2021 through 2024 across Thumbtack, Angi and HomeAdvisor, and it isn't uniformly glowing: a 2021 review reports being quoted one price and then charged more, the one sour note among otherwise detailed, largely five-star accounts. Angi and HomeAdvisor both show the same 4.5-star average over 17 reviews (76% five-star), and BBB has accredited the business with an A+ rating since 2016. Before booking, it's worth asking directly about how a project's final price is set, given the 2021 pricing complaint, and confirming which of his two Massachusetts license numbers — the verified Construction Supervisor registration or the Home Improvement Contractor number directories list — applies to your specific job. For an addition, deck, or a project heavy on finish carpentry, this is a track record built on hands-on, permitted, multi-year jobs rather than volume.
Great job building a new deck , I would hire him again , his price was great 32,000 others wanted triple his price, with everything being so very expensive, Joey kept it within my budget
Mcwhinnie Custom Builders was an amazing and professional job he did for my house. A beautiful outdoor deck and roof. When all other companies said it couldn't be done, Mcwhinnie Custom Builders said the opposite. On time , with price , professional and genuine caring for my home property. I would recommend to anyone to use them. Thanks again M.C.Builders !
Mcwhinnie custom builders came to my home and walked my husband and I through our kitchen and small addition remodel. He did everything we wanted while working with our budget. I love my new kitchen! We highly recommend him and his team.
Joe rebuilt my three season porch. It was on the house when we purchased it, so, it was already existing. Unfortunately for us the home inspector missed the poor Construction of it as well as the fact that it was separating from the house and falling apart. Joe stopped by to create an estimate for me and walked us through the entire process of what needed to happen in order to keep the sun porch and have it be structurally sound. The process did take a bit of time due to permitting Etc but in the end Joe explained exactly what needed to happen, the process that it was going to go through as well as a pretty precise timeline. Overall we are thrilled he did what he said he was going to do and completed it when he said it was going to be completed which is very rare with the limited experience I've had previously with contractors. Good job Joe look forward to seeing you in the fall to build our outdoor kitchen.
Joseph is extremely reliable and hands on when it comes to customer communication as well as satisfactory work. He likes to guarantee the job being done right the first time, and backs it up with the quality wood work he produces on each job site he runs. Joseph has worked in the carpentry field for close to 25 years and his craftsmanship speaks for its self.
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1 change recorded — last scanned Sep 6, 2026.
Takes on repairs others declined5.0
Shed craftsmanship5.0
Works with crooked houses5.0
Rescues stalled projects5.0
Detail-oriented crews4.3
Detailed workmanship5.0