Verified record
Isabel Construction runs a flat 5.0 out of 38 ratings on both Angi and HomeAdvisor, and the 23 written reviews behind that number keep naming the same person: Don, out at the house himself, sizing up a wet basement or a cracked foundation before anyone talks price. The company works out of Weymouth, Massachusetts, and its Better Business Bureau listing files it under waterproofing contractors. The strongest accounts are about basement and foundation problems other companies got wrong first. In a 2019 review, a homeowner said an earlier contractor had quoted an overpriced waterproofing system that would not have fixed the actual problem, while Don diagnosed it correctly and priced it fairly. Another 2019 review described a sump pump, French drain and foundation-sealing job that solved chronic water in the basement at the lowest of several quotes the homeowner had gathered. Several more reviews from 2019 and 2020 describe Don and his crew arriving on schedule, covering belongings before a messy repair, and leaving the site clean. The record isn't limited to waterproofing: a detailed 2020 review walks through an indoor fireplace stone-veneer job, followed a week later by laminate flooring installed through the whole house, and a 2021 review credits the crew with a full roof replacement finished in a few hours. The most recent review on file is from November 2023 — before that, the newest dated back to mid-2021, so the written record has a real gap in the last couple of years. The only license information here comes from BBB, which lists a Massachusetts home improvement contractor number (#184220) for the company without independently verifying it. For a basement leak or a foundation crack in the Weymouth area, the reviews point to a contractor who shows up, explains the diagnosis, and does not upsell — worth confirming current licensing and recent availability directly before booking.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from ISABEL CONSTRUCTION. Use it to sanity-check bids, then get the real number in writing.
Not sure which you need? Start with an inspection — many reputable companies assess free, and independent assessments run up to $500.
The wall run getting the drain — a full 30×40 ft basement is about 140 ft.
Estimated range
$7,600 – $15,000
Typical waterproofing project around $11,300
Don was very easy to work with and so far my basement remains water free.
Isabel Construction is outstanding. I had them do my roof and they did an excellent job: the new roof looked good, the job was done in a few hours, they cleaned so well after the job was done that one couldn’t tell that such an intensive work had been done in the area. In addition, the team was courteous and friendly and the cost was reasonable. I highly recommend Isabel Construction.
Had my basement done. They worked extremely hard and the work product was amazing. I would recommend them to family and friends!
Isabel Construction did what they said they were going to do and did it very well.
professional and freindly. completed work properly on time
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1 change recorded — last scanned Sep 18, 2026.
Basement waterproofing5.0
Retaining walls5.0
Bulkhead replacement4.8
Brick and 1850s fieldstone foundations repointed4.8
Structural carpentry4.8