Verified record
No state license for this trade. New Hampshire doesn't license or register waterproofing / foundationbusinesses, so there's no state registry to check. That's true of every waterproofing / foundation business in the state, not a mark against this one. Insurance is self-reported.
- A+ BBB ratingAccredited business
- 3 reviews in the last 6 monthsNo negatives
- 6 customer photosOf completed work
Highlights
- Seen on Reddit — 4 mentions in r/newhampshire, mostly positive
- Waterproofing — an April 2026 reviewer said foreman Doug found solutions to fit the basement layout
- Sump pumps — a November 2025 reviewer said a basement sump pump job took five hours
What does basement waterproofing cost in Greater Nashua?
Typical your area range for this kind of work, from regional averages — not a quote from Groundworks. 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
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