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Markham · updated August 2026

Foundation Repair Companies in Markham: the standings

18 foundation repair companies serving Markham, 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 Markham business. It never changes the ranking below. Claim your listing to take it.

  1. 1
    Groundworks Foundation Repair Toronto
    ★★★★★ 4.9 · 1,728 reviews · Markham · (365) 363-9900
  2. 2
    RCC Waterproofing Toronto
    ★★★★★ 4.8 · 791 reviews · North York · (416) 747-1920
  3. 3
    Basement Systems Toronto
    ★★★★★ 4.8 · 114 reviews · Ajax · (647) 692-4333
  4. 4
    Desa Contracting and Restoration
    ★★★★★ 4.9 · 94 reviews · Markham · (905) 940-8994
  5. 5
    Agc Pro Construction
    ★★★★★ 4.9 · 59 reviews · Markham · (647) 890-4991
  6. 6
    Direct Waterproofing Inc
    ★★★★★ 5 · 54 reviews · Markham · (647) 956-7249
  7. 7
    Sign Waterproofing
    ★★★★★ 4.9 · 41 reviews · Markham · (647) 568-1718
  8. 8
    RCC Waterproofing Markham
    ★★★★★ 4.9 · 39 reviews · Markham · (905) 918-5044
  9. 9
    Pristine Roofing & Masonry
    ★★★★★ 5 · 32 reviews · Markham · (905) 758-9445
  10. 10
    Basement Waterproofing Markham
    ★★★★★ 5 · 21 reviews · Markham · (289) 800-7170
  11. 11
    Hadasa Contracting & Excavation
    ★★★★★ 4.8 · 22 reviews · Markham · (416) 557-2328
  12. 12
    Peacehaven Construction Inc.
    ★★★★★ 4.9 · 15 reviews · Markham · (416) 843-8581
  13. 13
    SuperdryRoofingandMasonry
    ★★★★☆ 4.4 · 19 reviews · Markham · (437) 696-6350
  14. 14
    Toronto Foundation Repair
    ★★★★★ 5 · 8 reviews · Markham · (647) 405-6705
  15. 15
    ACCL Wet Basement, Foundation Crack Repair and Waterproofing
    ★★★★★ 5 · 7 reviews · Markham · (866) 701-8484
  16. 16
    Masonry Markham
    ★★★★★ 5 · 6 reviews · Markham · (289) 278-8836
  17. 17
    Groundworks Foundation Repair Downtown Toronto
    ★★★★★ 5 · 2 reviews · Scarborough · (647) 370-7447
  18. 18
    Concrete Markham
    ★★★★★ 5 · 1 reviews · Markham · (647) 694-9551
How the standings work. Rank = Google rating × review volume, observed for the Markham 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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