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License verifiedAvalon Masonry and Construction
Chimney rebuilds3.1
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Keller Waterproofing & Foundation Specialists is a Worcester-based basement and foundation waterproofing company — now in its fourth decade, started by James S. Keller in 1988 — with additional locations in Lakeville and Somerville. Customers describe concrete fixes: a French drain, sump pump and vapor-barrier system installed for a dry basement, and a separate exterior foundation-wall waterproofing job called thorough and well done. One reviewer who compared four waterproofing companies said Keller's bid ran a little higher but came with a more complete scope of work. The company has been a BBB-accredited business since 2012 and currently carries an A+ rating. BBB also lists a Massachusetts home improvement contractor registration for the company, though BBB notes it doesn't independently verify license numbers. Its HomeAdvisor listing states the company doesn't offer free estimates or warranties, worth confirming directly before booking. For basement leaks or foundation cracks around Worcester, Lakeville or Somerville, Keller has a decades-long local presence — just pin down pricing and warranty terms up front.
Did great job of waterproofing our exterior foundation walls. They knew what needed to be done and did it very well.
I contacted 4 company's to water proof my basement. Keller for your Celler was a little more expensive, but they offered a complete job.
REMOVEDand his team at Keller Waterproofing exceeded our expectations on a recent basement project. We installed a French drain, sump pump, and vapor barriers with the intent to have a dry and clean place for storage.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from Keller Waterproofing. 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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1 change recorded — last scanned Jul 31, 2026.
Chimney rebuilds3.1
