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Best Foundation Repair Companies in Sunnyslope, CA (2026)

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

The short answer

  1. 1

    Best overall in Sunnyslope: Dalinghaus Foundation Repair, CR Score 61/100; 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 109.

  3. 17

    Most-reviewed: Antis Roofing & Waterproofing, 398 Google reviews at 4.8★, the most of 109 ranked after Dalinghaus Foundation Repair; ranked #17.

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

109 Sunnyslope foundation repair companies are ranked here by CR Score, from ten published factors. 14 are open 24/7, 69 open Saturdays and 37 open Sundays, based on posted hours. The median Google rating is 4.9★ across 109 rated businesses.

Top 10 foundation repair companies in Sunnyslope at a glance

Top 10 foundation repair companies in Sunnyslope at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1Dalinghaus Foundation Repair614.9★ (733)Lake Elsinore, 23 mi away24/7Overall
2Professional Foundation Repair564.9★ (216)Garden Grove, 36 mi away24/7Emergencies
3Groundworks554.9★ (135)Ontario, 11 mi awaySat · Sun · Evenings—
4Dalinghaus Foundation Repair555.0★ (53)Irvine, 31 mi away24/7—
5SoCal Surfacing Inc.545.0★ (19)Adelanto, 12 mi away——
6A R SHOWER PANS545.0★ (9)Canyon Lake, 25 mi awaySat · Sun · Evenings—
7Infinity Shower Pans545.0★ (17)Whittier, 34 mi awaySat · Sun · Evenings—
8Pro-Seal Systems545.0★ (9)Glendora, 26 mi awaySat · Sun—
9J P Roofing534.9★ (100)Chino, 9 mi awaySat—
10Double Eagle Roofing & Waterproofing535.0★ (3)Riverside, 5 mi away24/7—

The 109 best foundation repair companies in Sunnyslope, 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

  6. #6 A R SHOWER PANS

    Based in Canyon Lake, 25 mi away

    54/100CR Score

    Ranked #6 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

  8. #8 Pro-Seal Systems

    Based in Glendora, 26 mi away

    54/100CR 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 8 AM–4 PM
    Address
    307 S Vermont Ave # H, Glendora, CA 91741
    View profile for Pro-Seal Systems(626) 278-0085

  9. #9 J P Roofing

    Based in Chino, 9 mi away

    53/100CR Score

    Ranked #9 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

  14. #14 CBS Construction Services

    Based in Huntington Beach, 39 mi away

    53/100CR Score

    Ranked #14 because of its Google rating and trade focus: 4.9★ from 15 Google reviews, listed on Google as “Waterproofing service”.

    • 4.9★ from 15 Google reviews
    Hours
    Mon–Fri 6 AM–7 PM · Sat–Sun 8 AM–2 PM
    Address
    15571 Producer Ln suite h, Huntington Beach, CA 92649
    View profile for CBS Construction Services(714) 840-2000

  20. #20 All Proof Decks

    Based in Orange, 28 mi away

    52/100CR Score

    Ranked #20 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

  21. #21 Horizon Roofing

    Based in Irvine, 33 mi away

    51/100CR Score

    Ranked #21 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

  25. #25 QXO (Waterproofing)

    Based in Placentia, 25 mi away

    51/100CR Score

    Ranked #25 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

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

foundation repair companies in Sunnyslope, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Best Choice Roofing Pros514.9★ (61)18 mi
27C&S Construction Enterprises515.0★ (21)26 mi
28Easy Builders Construction515.0★ (21)27 mi
29Robles Roofing and Waterproof515.0★ (15)38 mi
30Red Turtle Roofing of Fullerton515.0★ (31)32 mi
31DK Shower Pans515.0★ (10)36 mi
32951 flooring concepts LLC514.9★ (18)5 mi
33Infinity Concrete Coatings505.0★ (28)33 mi
34Pomona Roofers & Waterproofers504.3★ (6)18 mi
35DSM503.7★ (3)14 mi
36Shower Pans505.0★ (4)33 mi
37AAA Roofing and Waterproofing, LLC.503.9★ (27)5 mi
38Laguna Bay Developing504.9★ (46)34 mi
39Dreyfuss Grading494.6★ (9)23 mi
40Dexterous Hot Mop494.6★ (18)10 mi
41La Habra Top Roofing495.0★ (26)29 mi
42Foundation Flooring Inc493.7★ (6)12 mi
43True Price Roofing495.0★ (30)33 mi
44A1 Painting Service495.0★ (44)28 mi
45CJL Construction495.0★ (5)11 mi
46MC Roofing494.5★ (8)4 mi
47Pomona Roofing Group495.0★ (9)19 mi
48Immaculate Services495.0★ (26)32 mi
49All American Traditions Foundation Repair, Inc.494.5★ (17)15 mi
50California Custom Landscape494.6★ (25)17 mi

Also serving Sunnyslope

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 Sunnyslope
BusinessGoogle ratingDistance
ACE Restoration & Waterproofing, Inc.5.0★ (2)27 mi
Best Ever Waterproofing5.0★ (2)32 mi
CALIFORNIA ROOF COATINGS4.0★ (2)16 mi
CalPro Paving5.0★ (1)8 mi
Dan’s Roofing Company Riverside5.0★ (2)5 mi
Dominguez Construction3.0★ (2)29 mi
Foundation Construction5.0★ (1)9 mi
Freedom Chemical Corporation5.0★ (2)26 mi
Golden West Veranda5.0★ (1)26 mi
Hall's Deck Coating1.0★ (1)25 mi
Innovative Painting & Waterproofing5.0★ (2)27 mi
Masterseal Corporation3.0★ (2)38 mi
Mr Fix It Now1.0★ (1)27 mi
Professional Foundation Repair5.0★ (2)10 mi
R&R Roofing & Waterproofing, Inc.1.0★ (1)22 mi
Roofing & Waterproofing5.0★ (1)19 mi
Silver Leaf Construction Inc.5.0★ (1)23 mi
Slater Waterproofing Inc3.0★ (2)15 mi
The M&M Construction Group5.0★ (1)23 mi
Valley Shower Pans5.0★ (2)17 mi

How much do foundation repair companies cost in Sunnyslope?

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

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

How we ranked Sunnyslope foundation repair companies

We scored 109 Sunnyslope 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 Sunnyslope 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 Sunnyslope: frequently asked questions

Who is the best foundation repair company in Sunnyslope?

By CR Score, the highest-ranked foundation repair company in Sunnyslope, CA is Dalinghaus Foundation Repair with a CR Score of 61/100. It has 4.9★ from 733 Google reviews. It is open 24/7. Professional Foundation Repair (#2) and Groundworks (#3) follow. We ranked 109 foundation repair companies on ten factors, last updated October 22, 2026.

How many foundation repair companies are there in Sunnyslope?

ContractorsRanked ranks 109 foundation repair companies serving Sunnyslope, CA. Another 20 within 40 mi are listed but not ranked yet. Counts are as of October 2026.

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

14 ranked foundation repair companies in Sunnyslope post 24/7 hours. The highest-ranked are Dalinghaus Foundation Repair (#1), Professional Foundation Repair (#2) and Dalinghaus Foundation Repair (#4). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which foundation repair companies in Sunnyslope work on weekends?

69 of 109 ranked foundation repair companies post Saturday hours and 37 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 Sunnyslope?

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 Sunnyslope. Prices were last checked October 2026. Get at least two written quotes before you hire.

What Google rating do Sunnyslope foundation repair companies have?

The median Google rating among 109 rated foundation repair companies in Sunnyslope is 4.9★, with a median of 15 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 Sunnyslope count in this ranking?

Yes, if they are within 40 mi of the Sunnyslope 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 Sunnyslope

  1. October 2026: CR Scores recalculated for 109 foundation repair companies serving Sunnyslope.

More foundation repair companies and Sunnyslope pages

Other trades in Sunnyslope