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WaterproofingIndex

Best Underpinning & Basement Lowering Contractors in Mississauga, Ranked (2026)

Last updated: By Below-Grade Records Desk

7 underpinning contractors cover Mississauga, compiled August 2026.

405 Google reviews · median 4.94★ · typical $350–$480 per linear foot (Strong Basements (Toronto)) · 86% of rated companies at 4.8★ or above · scheduling: year-round; the work is inside the basement

Companies

Who does underpinning and basement lowering in Mississauga?

  3. MMT Waterproofing3

    MMT Waterproofing

    69/100 WaterproofingIndex Score

    5.0 km from Mississauga centre

    Underpinning & Basement Lowering
    • Says it has been going since 2008

    Its own website describes below-grade water work

    Request a quote

Below are the 7 underpinning contractors operating in Mississauga, whose Google ratings average 4.94★ over 405 reviews. The dataset was last rebuilt in August 2026. Half carry more than 53 Google reviews and half fewer. Full underpinning & basement lowering cost guide.

Ranking

What decides the order on this page?

The WaterproofingIndex Score orders these 7 underpinning contractors, whose median review count is 53. 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 Mississauga and the rest of the GTA, so they are answered once, on the underpinning & basement lowering page.

Coverage

Nearby areas and related work in Mississauga