Complete Basement Systems

4.9(58 reviews on Google)

Based in Massapequa, NY · more companies in Massapequa

Call (516) 334-0000 Visit website

About Complete Basement Systems

Complete Basement Systems in Massapequa repairs foundations and waterproofs basements and crawl spaces across Long Island, and has run on the island since 2000. It is merging with Premium Technical Services and Premium Foundation Supply, which brings foundation repair, below-grade waterproofing and grouting experience going back to 1973. Services include carbon fiber reinforcement, epoxy and urethane injection crack repair, helical piles and driven anchors, basement waterproofing, drainage systems, sump pumps, crawl space repair and encapsulation, dehumidifiers, window wells and basement windows. Commercial clients can get slab jacking, underpinning and permeation grouting. It also offers spray foam insulation and mold work, trains certified installers and takes on contractor partners. Free estimates and free quotes are offered. Rated 4.9 from 58 Google reviews, 55 of them five stars and 3 four stars.

What reviewers mention: crawl space waterproofing (11), courteous staff (7), window well digging (4), dry well installation (2), fast installation (2), water test (2), quick completion (2), prompt replies (2), informative staff (2), sump pump (2)

Where Complete Basement Systems works

Based in Massapequa, New York. Its website also names Hempstead, Mamaroneck, Larchmont, Pelham Manor, New Rochelle, Pelham, Port Chester, Mount Vernon and other towns. Call to confirm they cover your address.

Services and details

  • Foundation or waterproofing work

    Yes

  • Foundation repair

    Yes

  • Basement waterproofing

    Yes

  • Bowing wall repair

    Yes

  • Piers for settling

    Yes

  • Crack repair

    Yes

  • Crawl space repair

    Yes

  • Sump pumps

    Yes

  • Drain tile and drainage

    Yes

  • Concrete lifting

    Yes

  • Egress windows

    Yes

  • Free inspection or estimate

    Yes

No information yet on financing, states a license, warranty. The website did not say; call and ask.

Contact

Details last checked against the company's website and Google listing on 2026-10-21. Report a correction or request removal. Back to foundation repair companies in Massapequa.