1Sewer Squad Plumbing Co. Inc.
2.4 km from Ajax centre
Sump Pumps & Backwater Valves
Its own website describes below-grade water work
Basement waterproofing and drainage in Ajax
Last updated: By Below-Grade Records Desk
5 below-grade contractors are listed within 3 km of Ajax, compiled August 2026.
average Google rating 4.8★ · borough / region: Durham · deepest category: Sump Pumps & Backwater Valves (2 listed) · ordered on Google review data, not paid placement
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Which sump pump and backwater valve installers are listed for Ajax?
2 sump pump and backwater valve installers are listed for Ajax, averaging 4.8★ over 2,073 Google reviews. Sewer Squad Plumbing Co. Inc. holds the top position at 4.9★ from 1,987 reviews. Order comes from review data and record completeness, never payment.
- 1
2Superior Plumbing & Heating of Ajax
2.3 km from Ajax centre
Sump Pumps & Backwater ValvesIts own website describes below-grade water work
Coverage
Which basement waterproofing contractors are listed for Ajax?
1 basement waterproofing contractors are listed for Ajax, averaging 4.8★ over 22 Google reviews. Crawford & Son's holds the top position at 4.8★ from 22 reviews. Order comes from review data and record completeness, never payment.
1Crawford & Son's
2.1 km from Ajax centre
Basement WaterproofingIts own website describes below-grade water work
Coverage
Which underpinning contractors are listed for Ajax?
1 underpinning contractors are listed for Ajax, averaging 4.8★ over 5 Google reviews. My Basement Leaks holds the top position at 4.8★ from 5 reviews. Order comes from review data and record completeness, never payment.
1My Basement Leaks
1.8 km from Ajax centre
Underpinning & Basement LoweringIts own website describes below-grade water work
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Which below-grade services are covered in Ajax?
One row per category WaterproofingIndex covers in Ajax: how many companies are listed, what they average on Google, and the GTA price range published for that service. The ranked list for each one follows underneath.
| Category | Listed pros | Avg Google rating |
|---|---|---|
| Sump Pumps & Backwater Valves | 2 | 4.8★ |
| Basement Waterproofing | 1 | 4.8★ |
| Underpinning & Basement Lowering | 1 | 4.8★ |
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Why are some companies missing from this page?
38 of the 384 companies here publish no street address, only a Google service-area centroid, and 4 of them share one such point. That is not an address, so none of them is placed in Ajax. Find them in the A-Z index, and ask which areas they cover.
Coverage
Which areas next door are covered?
Below-grade crews work across boundaries, and a company two neighbourhoods away is often on the same street the following week. These Greater Toronto Area areas next to Ajax have their own lists.
Waterproofing in Ajax: frequently asked questions
Who works on wet basements in Ajax?
- WaterproofingIndex's August 2026 dataset holds 5 below-grade contractors covering Ajax, at an average Google rating of 4.8★. Sump Pumps & Backwater Valves is the deepest category here, with 2 listed. Get three itemised quotes before you commit to any of them.
Which below-grade service scores highest in Ajax?
- Sump Pumps & Backwater Valves leads on rating: 4.8★ across 2 rated companies, ahead of every other category WaterproofingIndex covers in this area. The stars come from Google reviewers, and our order weighs how many of them there were.
What should a Ajax homeowner expect to pay for sump pump and backwater valve work?
- Tornado Plumbing & Drains (Toronto) publishes $1,400 to $2,400 per installed system for primary sump pump installed in an existing pit across the GTA, before 13% HST. Depth and access are what move a Ajax quote inside that range. The sump pumps & backwater valves cost guide on WaterproofingIndex breaks out every line item with its source.