James G Dimopoulos

5,647 permitted projects is not a number most contractors get anywhere near. James G Dimopoulos works out of 25 Seven Sister Rd in Haverhill as an HVAC and mechanical contractor, and the permit history is dominated by that trade: roughly 1,897 HVAC jobs, with home additions, a handful of commercial renovations, and a few fence permits filling in around the edges. The shape of the work is telling. A typical permit runs about $4,565 — mini-splits, mechanical zones, weatherization and air-sealing runs — so this is high-volume residential system work, not the outfit you call to gut a house. Roughly 2,138 of those jobs landed in the past three years, though the yearly pace moves a lot: 1,062 in 2023, 834 in 2024, 242 in 2025. BuildZoom scores him 108, which it puts in the top 5% of Massachusetts licensed contractors, and it lists both a Massachusetts home improvement contractor registration (#167375) and a construction supervisor license (#CS-104464) as active — those are BuildZoom's records, not something confirmed against the state board here. What you will not find is a single published customer review. For a contractor with this much permitted work, that is worth noticing: the permits say he has done the job thousands of times, but nothing on record says how homeowners felt about it afterward. Ask for a few recent addresses in your town, confirm both licenses yourself with the state, and get the scope in writing.