Keller Waterproofing & Foundation Specialists

Keller Waterproofing & Foundation Specialists is based in Somerville, and the calls that come in are usually urgent: a basement flooding on the third rainy day, a foundation with cracks in a house decades old, a garage nobody wants to walk into. The company describes itself as family-owned and family-run since 1972, working its own crews without subcontracting, and it lists Boston, Somerville, and Worcester as its service area. Reviews going back to 2021 tell a steady story: 4.8 stars, and hardly a sour note in the mix. What that looks like up close, from reviews this spring, is fairly concrete — one homeowner had the team put in a French drain, sump pump, and full vapor barrier after comparing quotes and being swayed by "decades of experience," and another reported a garage that stayed dry through a stretch of major storms and a fast snowmelt that would have flooded it in the past. Other recent reviewers single out waterproofing done on exterior foundation walls, plus a pattern of being patient, professional, and quick to actually start work once a quote is signed. One thing worth asking about up front is price — a side-by-side comparison against other basement contractors had a customer calling Keller the most expensive of the group, though the company was willing to negotiate on the number. On paper the credentials check out: an A+ rating from the Better Business Bureau, accredited since 2006, with a Home Improvement Contractor registration (HIC #153750) on file. This is a good fit for a homeowner with an actual water or structural problem who'd rather have one crew handle the drainage, sump pump, and foundation work together than coordinate separate contractors. Given the pricing comparison above, it's worth getting the full scope in writing and lining it up against at least one other quote before signing.