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Best Foundation Repair Companies in Newmarket, ON (2026)

322 foundation repair companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →

The short answer

  1. 1

    Best overall in Newmarket: Groundworks, CR Score 65/100; 4.9★ from 1,412 Google reviews; open 7 days a week.

  2. 2

    Best for emergencies (open 24/7): RCC Waterproofing Toronto, posts 24/7 hours; ranked #2 of 322.

  3. 4

    Most-reviewed: Aquatech Basement Waterproofing Toronto, 655 Google reviews at 5.0★, the most of 322 ranked after Groundworks; ranked #4.

Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank

322 Newmarket foundation repair companies are ranked here by CR Score, from ten published factors. 127 are open 24/7, 268 open Saturdays and 198 open Sundays, based on posted hours. The median Google rating is 5.0★ across 322 rated businesses.

Top 10 foundation repair companies in Newmarket at a glance

Top 10 foundation repair companies in Newmarket at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1Groundworks654.9★ (1,412)East Gwillimbury, 17 km awaySat · Sun · EveningsOverall
2RCC Waterproofing Toronto624.8★ (634)Toronto, 38 km away24/7Emergencies
3Pro-Leak Solutions625.0★ (208)East Gwillimbury, 18 km awaySat · Sun · Evenings—
4Aquatech Basement Waterproofing Toronto625.0★ (655)Toronto, 41 km awaySat · Sun · EveningsMost reviews
5RCC Waterproofing Vaughan614.9★ (180)Concord, 33 km away24/7—
6Aquatech Waterproofing615.0★ (78)Vaughan, 27 km away24/7—
7Dryshield Waterproofing Toronto604.9★ (245)North York, 33 km awaySat · Sun · Evenings—
8RCC Waterproofing North York604.9★ (77)Toronto, 31 km away24/7—
9Direct Basement Waterproofing Toronto605.0★ (271)Toronto, 44 km awaySat · Sun · Evenings—
10Lympia Contracting Inc605.0★ (30)Richmond Hill, 20 km away24/7—

The 322 best foundation repair companies in Newmarket, ranked

Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.

Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.

  1. Ranked #1 in Newmarket

    #1 Groundworks

    Based in East Gwillimbury, 17 km away

    65/100CR Score

    Ranked #1 because of its Google rating and trade focus: 4.9★ from 1,412 Google reviews, listed on Google as “Waterproofing service”.

    • 4.9★ from 1,412 Google reviews
    Hours
    Mon–Fri 7 AM–11 PM · Sat 8 AM–11 PM · Sun 10 AM–11 PM
    Address
    12029 McCowan Rd, Whitchurch-Stouffville, ON L4A 7X5
    View profile for Groundworks(365) 363-9900

  3. #3 Pro-Leak Solutions

    Based in East Gwillimbury, 18 km away

    62/100CR Score

    Ranked #3 because of its Google rating and trade focus: 5.0★ from 208 Google reviews, listed on Google as “Waterproofing service”.

    • 5.0★ from 208 Google reviews
    Hours
    Mon–Sun 8 AM–8 PM
    Address
    197 Main St, Schomberg, ON L0G 1T0
    View profile for Pro-Leak Solutions(647) 883-5700

  11. #11 Stay Dry Waterproofing

    Based in North York, 34 km away

    60/100CR Score

    Ranked #11 because of its Google rating and trade focus: 4.8★ from 97 Google reviews, listed on Google as “Waterproofing service”.

    • 4.8★ from 97 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    168A Oakdale Rd Unit 7, North York, ON M3N 1V9
    View profile for Stay Dry Waterproofing(416) 782-9379

  14. #14 Canada Waterproofers

    Based in Mississauga, 56 km away

    59/100CR Score

    Ranked #14 because of its Google rating and trade focus: 5.0★ from 316 Google reviews, listed on Google as “Waterproofing service”.

    • 5.0★ from 316 Google reviews
    Hours
    Mon–Sat 7 AM–9 PM · Sun 10 AM–4 PM
    Address
    3410 Semenyk Ct #9, Mississauga, ON L5C 4P8
    View profile for Canada Waterproofers(905) 270-5325

  16. #16 ROOTERWORX

    Based in Mississauga, 57 km away

    59/100CR Score

    Ranked #16 because of its Google rating and trade focus: 5.0★ from 121 Google reviews, listed on Google as “Waterproofing service”.

    • 5.0★ from 121 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    34 Queen St W unit 4, Mississauga, ON L5H 1L4
    View profile for ROOTERWORX(416) 400-2685

  19. #19 Water Pro Group - Plumbing | Drain Repair & Drain Cleaning | Drain Backup | Main Drain Repair

    Based in Mississauga, 47 km away

    59/100CR Score

    Ranked #19 because of its Google rating and trade focus: 5.0★ from 70 Google reviews, listed on Google as “Waterproofing service”.

    • 5.0★ from 70 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1251-A Kamato Rd, Mississauga, ON L4W 2M2
    View profile for Water Pro Group - Plumbing | Drain Repair & Drain Cleaning | Drain Backup | Main Drain Repair(647) 554-4356

  21. #21 City Wide Group

    Based in East York, 40 km away

    59/100CR Score

    Ranked #21 because of its Google rating and trade focus: 4.8★ from 177 Google reviews, listed on Google as “Waterproofing service”.

    • 4.8★ from 177 Google reviews
    Hours
    Mon–Sat 8 AM–8 PM · Sun 9 AM–3 PM
    Address
    25 Hollinger Rd #3, East York, ON M4B 3N4
    View profile for City Wide Group(416) 283-5500

  23. #23 Barrie HP

    Based in Barrie, 11 km away

    58/100CR Score

    Ranked #23 because of its Google rating and trade focus: 5.0★ from 9 Google reviews, listed on Google as “Waterproofing service”.

    • 5.0★ from 9 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    View profile for Barrie HP(647) 243-3679

  25. #25 PRIME Waterproofing

    Based in Mississauga, 51 km away

    58/100CR Score

    Ranked #25 because of its Google rating and trade focus: 5.0★ from 161 Google reviews, listed on Google as “Waterproofing service”.

    • 5.0★ from 161 Google reviews
    Hours
    Mon–Sat 7 AM–9 PM · Sun 8 AM–9 PM
    Address
    3453 Cedar Creek Dr, Mississauga, ON L4Y 2Y2
    View profile for PRIME Waterproofing(647) 629-3756

Foundation repair companies ranked #26 to #50

#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 322 ranked foundation repair companies here; the rest are on their profiles.

foundation repair companies in Newmarket, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Toronto Waterproofing & Foundation Specialist585.0★ (51)45 km
27RCC Waterproofing Etobicoke585.0★ (50)47 km
28Hillside Waterproofing585.0★ (97)21 km
29AquaGuard Injection & Waterproofing584.8★ (45)6 km
30PH Group584.8★ (49)44 km
31Sign Waterproofing584.9★ (42)28 km
32Aquatech Basement Waterproofing Etobicoke575.0★ (79)46 km
33ESK Waterproofing574.6★ (35)39 km
34Dryshield Basement Waterproofing574.5★ (63)28 km
35Fast Fix Waterproofing & Foundations575.0★ (11)30 km
36Gord's Basement Waterproofing Ltd574.9★ (33)48 km
37DrainCom Basement Waterproofing574.8★ (92)47 km
38WetFix Basement Waterproofing575.0★ (7)7 km
39IcyReno Waterproofing & Underpinning574.9★ (29)48 km
40Aquatech Waterproofing575.0★ (43)43 km
41Durham Backhoe Basement Waterproofing575.0★ (67)51 km
42PLUMBER ON DEMAND of NOBLETON, ON565.0★ (159)22 km
43Aquatech Basement Waterproofing Oshawa565.0★ (49)50 km
44Royal Work Basement Waterproofing565.0★ (47)49 km
45Royal Work Waterproofing565.0★ (68)40 km
46GTA EPOXY INJECTIONS564.1★ (17)32 km
47Leaky Basement565.0★ (12)39 km
48WillFix - Basement Underpinning Mississauga564.7★ (34)52 km
49Main St. Waterproofing564.5★ (16)38 km
50ACCL Wet Basement, Foundation Crack Repair and Waterproofing565.0★ (4)24 km

Also serving Newmarket

20 more foundation repair companies within 64 km that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.

Unranked foundation repair companies serving Newmarket
BusinessGoogle ratingDistance
Adiga Construction Decks and Fences, Helical pile footings5.0★ (22)In Newmarket
Ainger Group Roofing and Exteriors4.9★ (61)In Newmarket
Bagnato Masonry Ltd5.0★ (85)In Newmarket
Bost Construction Inc5.0★ (17)In Newmarket
Canadian Concrete Leveling4.8★ (384)In Newmarket
Ernst Wallner Contracting and Design (EWCD)4.7★ (14)In Newmarket
Everest Climate Solutions Inc.4.9★ (261)In Newmarket
Impressions Home Solutions Inc5.0★ (24)In Newmarket
Innovators ArcStudio5.0★ (13)In Newmarket
JS Home Services4.5★ (244)In Newmarket
LOON Renovation5.0★ (20)In Newmarket
Northern Construction Management Newmarket | Renovations, Additions & Custom Builds | Commercial & Residential5.0★ (18)In Newmarket
Plumber Real Way Newmarket5.0★ (118)In Newmarket
Prime Decks4.9★ (69)In Newmarket
Royal Fresh Air4.9★ (103)In Newmarket
ServiceMaster Restore of Aurora-Newmarket4.3★ (53)In Newmarket
SGF ELECTRIC5.0★ (131)In Newmarket
Unique Potlight4.9★ (40)In Newmarket
V.Jahan Renovation5.0★ (15)In Newmarket
YORK GLASS SHOWERS & RAILING +5.0★ (76)In Newmarket

How much do foundation repair companies cost in Newmarket?

US national ranges converted to CAD, not adjusted for Newmarket. Each row names its basis and the month we checked it.

How much do foundation repair companies cost in Newmarket?
JobLowTypicalHighBasisChecked
Foundation repairCA$3,130CA$7,270CA$11,430Per project: typical range of customer-reported repairs. US national range converted at 1.4054 CAD per USD (Bank of Canada, October 20, 2026)October 2026

How we ranked Newmarket foundation repair companies

We scored 322 Newmarket foundation repair companies on ten factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, not counted as zero. Scores last refreshed October 22, 2026.

Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.

Read the full method: formula, sources and exclusions

CR Score factors and weights
FactorWeightComputed fromIn Newmarket data
Reputation25%Google star rating, adjusted for how many reviews back itMeasured
Credentials15%Active state license, bond and workers’ comp on fileNot yet collected
Review volume10%Number of Google reviews, compared with the most-reviewed business on the listMeasured
Recency5%Share of reviews from the last 12 monthsNot yet collected
Availability5%Weekly open hours, Saturday, Sunday, 24/7 or same-dayMeasured
Trade focus10%How clearly the business does this trade (its Google category and name)Measured
Proximity5%Based in the city scores highest, less the farther away it isMeasured
Claimed profile10%The business has claimed its ContractorsRanked profile (free or paid earn the same)Measured
Partnered5%The business links to ContractorsRanked from its own website with our badge, checked periodicallyMeasured
ContractorsRanked reviews10%Verified customer reviews collected by ContractorsRanked: their rating and how many there areMeasured

Foundation repair companies in Newmarket: frequently asked questions

Who is the best foundation repair company in Newmarket?

By CR Score, the highest-ranked foundation repair company in Newmarket, ON is Groundworks with a CR Score of 65/100. It has 4.9★ from 1,412 Google reviews. It is open 7 days a week. RCC Waterproofing Toronto (#2) and Pro-Leak Solutions (#3) follow. We ranked 322 foundation repair companies on ten factors, last updated October 22, 2026.

How many foundation repair companies are there in Newmarket?

ContractorsRanked ranks 322 foundation repair companies serving Newmarket, ON. Another 20 within 64 km are listed but not ranked yet. Counts are as of October 2026.

Which foundation repair companies in Newmarket are open 24/7?

127 ranked foundation repair companies in Newmarket post 24/7 hours. The highest-ranked are RCC Waterproofing Toronto (#2), RCC Waterproofing Vaughan (#5) and Aquatech Waterproofing (#6). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which foundation repair companies in Newmarket work on weekends?

268 of 322 ranked foundation repair companies post Saturday hours and 198 post Sunday hours. The highest-ranked open Saturdays are Groundworks (#1), RCC Waterproofing Toronto (#2) and Pro-Leak Solutions (#3). Posted hours are office hours; crews may book weekend jobs separately.

How much does foundation repair cost in Newmarket?

Foundation repair typically costs CA$3,130 to CA$11,430, with CA$7,270 typical (Per project: typical range of customer-reported repairs. US national range converted at 1.4054 CAD per USD (Bank of Canada, October 20, 2026)). This is a national range, not adjusted for Newmarket. Prices were last checked October 2026. Get at least two written quotes before you hire.

What Google rating do Newmarket foundation repair companies have?

The median Google rating among 322 rated foundation repair companies in Newmarket is 5.0★, with a median of 24 reviews. Groundworks has the most, 1,412 reviews, and ranks #1. We adjust ratings for review count, so a few five-star reviews cannot top the list.

How does ContractorsRanked rank foundation repair companies?

Each foundation repair company gets a 0–100 CR Score from ten published factors, led by reputation (25%), credentials (15%), review volume (10%) and trade focus (10%). A business with no Google reviews scores zero on rating, review volume and recency; other factors we cannot measure are left out. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.

Do foundation repair companies outside Newmarket count in this ranking?

Yes, if they are within 64 km of the Newmarket city centre, our service radius for foundation repair companies. Each listing shows where the business is based and how far away it is. Proximity is 5% of the CR Score, so a nearby business gets a small edge.

Update log for Newmarket

  1. October 2026: CR Scores recalculated for 322 foundation repair companies serving Newmarket.
  2. October 2026: 1 duplicate listing merged.

More foundation repair companies and Newmarket pages

Other trades in Newmarket