Verified record
Cesar Alves runs CN Construction Group out of Bellingham, and the three reviews on file are unified by one thing: he keeps a job moving when it goes sideways. In a late-2023 review, a homeowner described a $34,000 septic system installation that ran into a misplaced town permit, SUV-sized boulders in the excavation, and a water main problem — and still gave Cesar's crew 5 stars for how they worked through it. A mid-2023 review described a $6,500 service water line repair where the crew "eliminated all obstacles" and exceeded expectations; a 2024 review called a septic repair job with "several challenges" handled well. BuildZoom's own scoring puts the company at 108 — above 95% of the Massachusetts contractors it tracks — built on 85 permitted projects, the bulk of them roofing work in the past three years at a typical permit size around $12,700. That's a notable split from what the written reviews describe: every account on file is about septic or water-line work, not roofing, so the roofing volume and the septic reputation are really two separate track records worth asking about separately. BuildZoom also states it verified an active Massachusetts Construction Supervisor license (CS-113974) and an active Home Improvement Contractor registration (#196591); an older HIC registration on the same page is listed inactive. With only three written reviews to go on despite the scale of the permit history, it's worth asking directly which crew and license cover which kind of job before booking.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from Cesar Alves Dba Cn Construction Group. Use it to sanity-check bids, then get the real number in writing.
A square is 100 sq ft of roof surface — bigger than the floor plan because of pitch and overhangs.
Estimated range
$9,000 – $18,600
Typical roofing project around $13,800
Septic repair. Cesar was awesome. There were several challenges on the job and he did a great job getting everything done.
Septic system replacement ($34,000). When things go well it is easy to be happy and pleased. The installation of our septic system did not go well. That said, Cesar and crew earned 5 stars and I explain why. Cesar's team is the definition of mettle. We interviewed several contractors and Cesar impressed us the most. We set a start date and then the town misplaced the paperwork; Cesar rolled with it and graciously accommodated the delay. While excavating he came across a couple of rocks the size of an SUV and handled it. The town had not properly marked the water line and the water main was punctured during excavation; Cesar pinched off the line until the town could locate the shut-off and handled it all like a pro. The excavation work was great — code required a 3' width either side of the new septic line and he added an additional 5 feet on each side. When the town refused to allow prior fill to be put back, he trucked in an extra 10 loads of sand (at $800 a load) and trucked out the extra fill. Despite cost overruns that wiped out any profit and complications beyond his control that turned a 2-week job into a 4-week job, Cesar maintained his composure. The workmanship looked great. His crew was wonderful to deal with. Cesar was exceptional.
Repair service line ($6,500). Cesar and his crew were terrific. I needed a service water line repaired and they eliminated all obstacles and completed the job, exceeding my expectations. I highly recommend them.
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1 change recorded — last scanned Jul 29, 2026.
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