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CJM Waterproofing is a Haverhill outfit built around one job: keeping water out of basements. Its Angi listing names foundation sealing and waterproofing as its services, and the company's own description covers residential and commercial basement waterproofing, repair and replacement. The company says it has been at this for nine years. The Angi page offers free estimates and takes credit cards. One thing to settle before the crew arrives: the FAQ on that page says the company does not offer warranties, and it does not take emergency calls — on waterproofing work, where the test is whether the basement stays dry through the next storm, ask what happens if water comes back. If you have a wet basement or a foundation that needs sealing, this is the narrow trade CJM names as its own. Before hiring, ask for its licence and insurance details, get the diagnosis and the fix in writing, and agree up front on what recourse you have if the problem returns.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from CJM 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
Specializes in
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1 change recorded — last scanned Jul 29, 2026.
Basement waterproofing5.0
Retaining walls5.0
Bulkhead replacement4.8
Brick and 1850s fieldstone foundations repointed4.8
Structural carpentry4.8
Owner-led communication4.8