Graham Built Corp.

Graham Built Corp. is what a Mass Save weatherization assignment looks like when it goes right. Across 54 Google ratings averaging 4.9, the job being described is almost always the same one: crews in the attic and the basement, old insulation out, air sealing in, and a drafty house buttoned up before winter. The specifics are unusually concrete. A homeowner writing in April 2022 described the crew laying floor and carpet protection, vacuuming out insulation fouled by the previous owner's mouse problem, air-sealing the attic and basement, and insulating above a cold garage beneath the primary bedroom — and finding a roof leak and an HVAC leak the owner hadn't known about. In March 2022 another customer insulating the dormers of a Cape said the four access holes the crew had to cut came back patched and paint-ready. In February 2022 a crew lead shoveled a driveway so the truck could get in, then vacuumed and Swiffered the stairs on the way out. Cleanliness is the beat that repeats hardest. Reviewer after reviewer in 2021 and 2022 came back to the same thing — protection down, dust controlled, floors left tidier than the crew found them — and several named the same people, Joe and Nancy in particular, across separate jobs. The Pembroke company also shows up on the heating side. A February 2024 customer credited them with a heat pump installation, and a Reddit commenter in January 2025 named "East Coast Mini Splits / Graham Built" as the installer of a mini-split system that was cooling well. One thing to weigh honestly before calling: the written record runs 2021 to 2024 and stops there. Thirty reviews without a single sour one is a consistent history, but it is a history — not a picture of how the crews and the schedule are running now. Most of those customers also arrived through a Mass Save assignment rather than shopping the company directly, so the accounts describe program work more than open-market bids. For an attic-and-basement insulation or air-sealing job routed through Mass Save on the South Shore, this is a well-documented outfit with a long clean run behind it. Ask who is leading your crew, confirm the current scope and schedule in writing, and check what recent work they can point you to.