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London · updated August 2026

Basement Waterproofing Companies in London: the standings

19 basement waterproofing companies serving London, ranked by Google rating and review count. The bar shows each one's review volume against the leader. Nobody can pay to move up.

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One labelled spot above these standings, reserved for a claimed London business. It never changes the ranking below. Claim your listing to take it.

  1. 1
    Advanced Basement Systems
    ★★★★★ 4.9 · 590 reviews · Windsor · (226) 706-2439
  2. 2
    Advanced Basement Systems
    ★★★★★ 4.9 · 191 reviews · London · (226) 271-8708
  3. 3
    Direct Basement Waterproofing Cambridge
    ★★★★★ 5 · 70 reviews · Cambridge · (647) 932-3977
  4. 4
    A1 Waterproofing
    ★★★★★ 4.6 · 99 reviews · London · (519) 495-6060
  5. 5
    Koala Insulation of London
    ★★★★★ 5 · 58 reviews · London · (226) 774-3802
  6. 6
    Basement Waterproofing London
    ★★★★★ 5 · 45 reviews · London · (647) 494-4801
  7. 7
    Power Foundation Systems Ltd
    ★★★★★ 4.7 · 52 reviews · London · (519) 298-0478
  8. 8
    Ashworth Drainage
    ★★★★★ 4.6 · 36 reviews · London · (519) 660-9375
  9. 9
    Classic Basement Waterproofing London
    ★★★★★ 4.8 · 25 reviews · London · (646) 698-4279
  10. 10
    London Wisecracks
    ★★★★★ 4.8 · 25 reviews · London · (519) 520-9144
  11. 11
    Aquatech Basement Waterproofing London
    ★★★★★ 5 · 20 reviews · London · (226) 641-0771
  12. 12
    RCC Waterproofing London
    ★★★★★ 4.6 · 25 reviews · London · (519) 488-1406
  13. 13
    West Key Builders, Parging, Concrete Contractor.
    ★★★★★ 4.6 · 21 reviews · London · (519) 777-8171
  14. 14
    Lord’s Mate INC
    ★★★★★ 5 · 15 reviews · London · (519) 701-5507
  15. 15
    We Seal That
    ★★★★☆ 4.4 · 20 reviews · London · (226) 376-3333
  16. 16
    Basement Waterproofing Pros
    ★★★★★ 4.8 · 8 reviews · London · (519) 805-2515
  17. 17
    Basement Waterproofing Solutions
    ★★★★★ 5 · 5 reviews · London · (519) 319-8208
  18. 18
    Stopleak Basement Waterproofing Unclaimed
    ★★★★★ 5 · 5 reviews · London · (519) 661-9424
  19. 19
    AJN Waterproofing Unclaimed
    ★★★★★ 5 · 2 reviews · London · (519) 319-1323
How the standings work. Rank = Google rating × review volume, observed for the London area in August 2026. No submissions, no fees, no exceptions — a business moves up by earning reviews, not by paying us. Refreshed monthly.

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