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Best Foundation Repair Companies in Fontana, CA (2026)

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

The short answer

  1. 1

    Best overall in Fontana: Dalinghaus Foundation Repair, CR Score 60/100; 4.9★ from 733 Google reviews; open 24/7.

  2. 2

    Best for emergencies (open 24/7): Professional Foundation Repair, posts 24/7 hours; ranked #2 of 97.

  3. 20

    Most-reviewed: Antis Roofing & Waterproofing, 398 Google reviews at 4.8★, the most of 97 ranked after Dalinghaus Foundation Repair; ranked #20.

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

97 Fontana foundation repair companies are ranked here by CR Score, from ten published factors. 13 are open 24/7, 63 open Saturdays and 36 open Sundays, based on posted hours. The median Google rating is 5.0★ across 97 rated businesses.

Top 10 foundation repair companies in Fontana at a glance

Top 10 foundation repair companies in Fontana at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1Dalinghaus Foundation Repair604.9★ (733)Lake Elsinore, 29 mi away24/7Overall
2Professional Foundation Repair564.9★ (216)Garden Grove, 39 mi away24/7Emergencies
3Groundworks554.9★ (135)Ontario, 11 mi awaySat · Sun · Evenings—
4Pro-Seal Systems545.0★ (9)Glendora, 25 mi awaySat · Sun—
5Dalinghaus Foundation Repair545.0★ (53)Irvine, 36 mi away24/7—
6Infinity Shower Pans545.0★ (17)Whittier, 36 mi awaySat · Sun · Evenings—
7Empire Waterproofing Inc545.0★ (6)FontanaSat · Sun—
8A R SHOWER PANS535.0★ (9)Canyon Lake, 30 mi awaySat · Sun · Evenings—
9SoCal Surfacing Inc.535.0★ (19)Adelanto, 17 mi away——
10American Decking and Waterproofing Company534.9★ (100)Glendale, 34 mi away——

The 97 best foundation repair companies in Fontana, 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.

  3. #3 Groundworks

    Based in Ontario, 11 mi away

    55/100CR Score

    Ranked #3 because of its Google rating and review volume: 4.9★ from 135 Google reviews.

    • 4.9★ from 135 Google reviews
    Hours
    Mon–Fri 4 AM–8 PM · Sat 5 AM–8 PM · Sun 7 AM–8 PM
    Address
    1850 S Parco Ave, Ontario, CA 91761
    View profile for Groundworks(909) 220-5664

  4. #4 Pro-Seal Systems

    Based in Glendora, 25 mi away

    54/100CR Score

    Ranked #4 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
    Hours
    Mon–Sun 8 AM–4 PM
    Address
    307 S Vermont Ave # H, Glendora, CA 91741
    View profile for Pro-Seal Systems(626) 278-0085

  7. #7 Empire Waterproofing Inc

    Based in Fontana

    54/100CR Score

    Ranked #7 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “General contractor”.

    • 5.0★ from 6 Google reviews
    Hours
    Mon–Thu 8 AM–4:30 PM · Fri 7 AM–3:30 PM · Sat–Sun 8 AM–4:30 PM
    Address
    10491 Calabash Ave, Fontana, CA 92337
    View profile for Empire Waterproofing Inc(909) 829-9251

  8. #8 A R SHOWER PANS

    Based in Canyon Lake, 30 mi away

    53/100CR Score

    Ranked #8 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
    Hours
    Mon–Sun 6 AM–11 PM
    Address
    30240 Gulf Stream Dr, Canyon Lake, CA 92587
    View profile for A R SHOWER PANS(562) 217-7315

  12. #12 J P Roofing

    Based in Chino, 10 mi away

    53/100CR Score

    Ranked #12 because of its Google rating and review volume: 4.9★ from 100 Google reviews.

    • 4.9★ from 100 Google reviews
    Hours
    Mon–Fri 6 AM–4 PM · Sat 7 AM–5 PM · Sun closed
    View profile for J P Roofing(909) 261-6473

  21. #21 All Proof Decks

    Based in Orange, 30 mi away

    51/100CR Score

    Ranked #21 because of its Google rating and trade focus: 5.0★ from 19 Google reviews, listed on Google as “Waterproofing service”.

    • 5.0★ from 19 Google reviews
    Hours
    Mon–Fri 8 AM–5 PM · Sat–Sun closed
    Address
    820 W Fletcher Ave, Orange, CA 92865
    View profile for All Proof Decks(714) 253-3330

  24. #24 QXO (Waterproofing)

    Based in Placentia, 28 mi away

    51/100CR Score

    Ranked #24 because of its Google rating and trade focus: 4.3★ from 24 Google reviews, listed on Google as “Waterproofing service”.

    • 4.3★ from 24 Google reviews
    Hours
    Mon–Fri 6 AM–4 PM · Sat–Sun closed
    Address
    721 S Van Buren St, Placentia, CA 92870
    View profile for QXO (Waterproofing)(800) 439-4546

  25. #25 Horizon Roofing

    Based in Irvine, 37 mi away

    51/100CR Score

    Ranked #25 because of its Google rating and review volume: 4.8★ from 59 Google reviews.

    • 4.8★ from 59 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    2030 Main St # 1300, Irvine, CA 92614
    View profile for Horizon Roofing(714) 328-1967

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 97 ranked foundation repair companies here; the rest are on their profiles.

foundation repair companies in Fontana, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Precision Roofing & Waterproofing515.0★ (52)36 mi
27DK Shower Pans515.0★ (10)38 mi
28C&S Construction Enterprises505.0★ (21)30 mi
29Pomona Roofers & Waterproofers504.3★ (6)18 mi
30Red Turtle Roofing of Fullerton505.0★ (31)36 mi
31Best Choice Roofing Pros504.9★ (61)23 mi
32DSM503.7★ (3)15 mi
33Dexterous Hot Mop504.6★ (18)7 mi
34Dreyfuss Grading504.6★ (9)21 mi
35Infinity Concrete Coatings505.0★ (28)37 mi
36Shower Pans505.0★ (4)35 mi
37951 flooring concepts LLC504.9★ (18)11 mi
38AAA Roofing and Waterproofing, LLC.493.9★ (27)8 mi
39All American Traditions Foundation Repair, Inc.494.5★ (17)13 mi
40La Habra Top Roofing495.0★ (26)31 mi
41True Price Roofing495.0★ (30)33 mi
42Pomona Roofing Group495.0★ (9)18 mi
43Foundation roof's493.7★ (3)9 mi
44Laguna Bay Developing494.9★ (46)38 mi
45California Custom Landscape494.6★ (25)17 mi
46A1 Painting Service495.0★ (44)31 mi
47MC Roofing494.5★ (8)6 mi
48Immaculate Services495.0★ (26)34 mi
49Pro Budget Roofing495.0★ (9)11 mi
50Foundation Flooring Inc483.7★ (6)17 mi

Also serving Fontana

20 more foundation repair companies within 40 mi 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 Fontana
BusinessGoogle ratingDistance
ACE Restoration & Waterproofing, Inc.5.0★ (2)30 mi
American Eagle Concrete Inc3.7★ (3)In Fontana
Build Construction Inc.1.0★ (1)In Fontana
BW ConstructionIn Fontana
CALIFORNIA ROOF COATINGS4.0★ (2)16 mi
Dan’s Roofing Company Riverside5.0★ (2)10 mi
Dominguez Construction3.0★ (2)28 mi
Hoff Reinforcing Steel Installation4.7★ (3)In Fontana
Innovative Painting & Waterproofing5.0★ (2)29 mi
J&M Builders5.0★ (2)In Fontana
Jakes Concrete Work San Bernardino ContractorIn Fontana
Modular ConstructionIn Fontana
Monroe Diversified Companies Inc.In Fontana
NRH Construction IncIn Fontana
Professional Foundation Repair5.0★ (2)14 mi
Resource Builders1.0★ (1)In Fontana
Slater Waterproofing Inc3.0★ (2)14 mi
Socal Dream Builders5.0★ (1)In Fontana
The Conco Companies4.7★ (15)In Fontana
Valley Shower Pans5.0★ (2)22 mi

How much do foundation repair companies cost in Fontana?

National price ranges in USD, not adjusted for Fontana. Each row names its basis and the month we checked it.

How much do foundation repair companies cost in Fontana?
JobLowTypicalHighBasisChecked
Foundation repair$2,225$5,174$8,133Per project: typical range of customer-reported repairs. US national rangeOctober 2026

How we ranked Fontana foundation repair companies

We scored 97 Fontana 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 Fontana 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 Fontana: frequently asked questions

Who is the best foundation repair company in Fontana?

By CR Score, the highest-ranked foundation repair company in Fontana, CA is Dalinghaus Foundation Repair with a CR Score of 60/100. It has 4.9★ from 733 Google reviews. It is open 24/7. Professional Foundation Repair (#2) and Groundworks (#3) follow. We ranked 97 foundation repair companies on ten factors, last updated October 22, 2026.

How many foundation repair companies are there in Fontana?

ContractorsRanked ranks 97 foundation repair companies serving Fontana, CA. 1 of them is based in Fontana; the rest serve it from nearby towns. Another 20 within 40 mi are listed but not ranked yet. Counts are as of October 2026.

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

13 ranked foundation repair companies in Fontana post 24/7 hours. The highest-ranked are Dalinghaus Foundation Repair (#1), Professional Foundation Repair (#2) and Dalinghaus Foundation Repair (#5). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which foundation repair companies in Fontana work on weekends?

63 of 97 ranked foundation repair companies post Saturday hours and 36 post Sunday hours. The highest-ranked open Saturdays are Dalinghaus Foundation Repair (#1), Professional Foundation Repair (#2) and Groundworks (#3). Posted hours are office hours; crews may book weekend jobs separately.

How much does foundation repair cost in Fontana?

Foundation repair typically costs $2,225 to $8,133, with $5,174 typical (Per project: typical range of customer-reported repairs. US national range). This is a national range, not adjusted for Fontana. Prices were last checked October 2026. Get at least two written quotes before you hire.

What Google rating do Fontana foundation repair companies have?

The median Google rating among 97 rated foundation repair companies in Fontana is 5.0★, with a median of 14 reviews. Dalinghaus Foundation Repair has the most, 733 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 Fontana count in this ranking?

Yes, if they are within 40 mi of the Fontana city center, 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 Fontana

  1. October 2026: CR Scores recalculated for 97 foundation repair companies serving Fontana.

More foundation repair companies and Fontana pages

Other trades in Fontana