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Ajax · updated October 2026

Waterproofing Contractors in Ajax: the standings

11 waterproofing contractors serving Ajax, ranked by Google rating and review count. The bar shows each one's review volume against the leader. Arrows show movement since Sep 6. Nobody can pay to move up.

Read the arrows with care on this board. It listed 20 businesses on Sep 6 and lists 11 now. When the number of businesses falls, ranks rise for everyone still listed, whether or not they earned anything. The review counts below are unaffected.

Featured slot — open

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

Who leads waterproofing contractors in Ajax right now

  1. 1

    Basement Systems Toronto

    ★★★★★ 4.7 · 121 reviews · Ajax · (647) 692-4333
    ▲7 +6 reviews since Sep 6
  2. 2

    Direct Basement Waterproofing Pickering

    ★★★★★ 5 · 57 reviews · Ajax · (647) 584-0571
    ▲7 0 reviews since Sep 6
  3. 3

    Basement Waterproofing Pickering

    ★★★★★ 5 · 49 reviews · Ajax · (289) 670-9460
    ▲7 0 reviews since Sep 6
  4. 4

    Classic Waterproofing Oshawa

    ★★★★★ 5 · 41 reviews · Oshawa · (647) 523-6324
    new 0 reviews since Sep 6
  5. 5

    Blacklight Renovation of Ajax

    ★★★★★ 5 · 31 reviews · Ajax · (647) 799-3460
    new 0 reviews since Sep 6
  6. 6

    G1000 Home Substructure

    ★★★★★ 5 · 29 reviews · Ajax · (416) 992-6434
    ▲6 0 reviews since Sep 6
  7. 7

    Water Damage Pickering

    ★★★★★ 5 · 23 reviews · Pickering · (289) 907-1335
    ▲6 0 reviews since Sep 6
  8. 8

    Basement Waterproofing Oshawa

    ★★★★★ 5 · 21 reviews · Oshawa · (647) 560-6751
    new 0 reviews since Sep 6
  9. 9

    Crawford & Son's

    ★★★★★ 4.8 · 23 reviews · Ajax · (905) 686-6880
    ▲5 0 reviews since Sep 6
  10. 10

    My Basement Leaks

    ★★★★☆ 3.5 · 6 reviews · Ajax · (647) 559-5074
    ▲8 +1 reviews since Sep 6
  11. 11

    AJS Waterproof

    ★★★★★ 5 · 1 reviews · Ajax · (416) 410-5116
    ▲8 0 reviews since Sep 6
How the standings work. Rank = Google rating × review volume, observed for the Ajax area in October 2026. No submissions, no fees, no exceptions — a business moves up by earning reviews, not by paying us. Refreshed monthly. 8 of 11 changed rank since Sep 6. See this month's movers.

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