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Underpinning & Basement Lowering Contractors in Don Mills, Ranked (2026)

Last updated: By Below-Grade Records Desk

4 underpinning contractors cover the Don Mills area, compiled August 2026.

247 Google reviews · median 4.92★ · typical $350–$480 per linear foot (Strong Basements (Toronto)) · scheduling: year-round; the work is inside the basement

Companies

Who does underpinning and basement lowering in Don Mills?

  1. SDM Contractor1

    SDM Contractor

    2.0 km from Don Mills centre

    Underpinning & Basement Lowering

    Its own website describes below-grade water work

    (647) 460-7014Call
  4. City Wide Group4

    City Wide Group

    3.4 km from Don Mills centre

    Underpinning & Basement Lowering

    Its own website describes below-grade water work

    (416) 283-5500Call

Looking for a underpinning contractor in the Don Mills area? WaterproofingIndex has 4 on file, averaging 4.92★ across 247 Google reviews, as of August 2026. Half carry more than 25 Google reviews and half fewer. Full underpinning & basement lowering cost guide.

Ranking

What decides the order on this page?

A Bayesian-adjusted Google rating orders these 4 underpinning contractors, whose median review count is 25. Position is not for sale. How the score is built.

Rules

Permits and subsidies for underpinning and basement lowering

Permit rules and subsidies do not change between Don Mills and the rest of the GTA, so they are answered once, on the underpinning & basement lowering page.

Coverage

Nearby areas and related work in Don Mills