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Best Foundation Repair Companies in Muscoy, CA (2026)

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

The short answer

  1. 1

    Best overall in Muscoy: Dalinghaus Foundation Repair, CR Score 59/100; 4.9★ from 733 Google reviews; open 24/7.

  2. 6

    Best for emergencies (open 24/7): Double Eagle Roofing & Waterproofing, posts 24/7 hours; ranked #6 of 68.

  3. 3

    Most-reviewed: Groundworks, 135 Google reviews at 4.9★, the most of 68 ranked after Dalinghaus Foundation Repair; ranked #3.

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

68 Muscoy foundation repair companies are ranked here by CR Score, from ten published factors. 8 are open 24/7, 42 open Saturdays and 24 open Sundays, based on posted hours. The median Google rating is 4.9★ across 68 rated businesses.

Most of this list also appears on the Foundation repair companies in San Bernardino ranking. See Foundation repair companies in San Bernardino

Top 10 foundation repair companies in Muscoy at a glance

Top 10 foundation repair companies in Muscoy at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1Dalinghaus Foundation Repair594.9★ (733)Lake Elsinore, 33 mi away24/7Overall
2American Decking and Waterproofing Company544.9★ (100)Glendale, 28 mi away——
3Groundworks544.9★ (135)Ontario, 18 mi awaySat · Sun · EveningsMost reviews
4Pro-Seal Systems535.0★ (9)Glendora, 30 mi awaySat · Sun—
5A R SHOWER PANS535.0★ (9)Canyon Lake, 33 mi awaySat · Sun · Evenings—
6Double Eagle Roofing & Waterproofing525.0★ (3)Riverside, 10 mi away24/7Emergencies
7SoCal Surfacing Inc.525.0★ (19)Adelanto, 23 mi away——
8Kaliber Roofing Inc524.8★ (82)Montclair, 21 mi awaySat · Sun · Evenings—
9J P Roofing524.9★ (100)Chino, 17 mi awaySat—
10DECKS & CONCRETE SOLUTIONS525.0★ (6)Wildomar, 36 mi awaySat · Sun—

The 68 best foundation repair companies in Muscoy, 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, 18 mi away

    54/100CR 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, 30 mi away

    53/100CR 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

  5. #5 A R SHOWER PANS

    Based in Canyon Lake, 33 mi away

    53/100CR Score

    Ranked #5 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

  9. #9 J P Roofing

    Based in Chino, 17 mi away

    52/100CR 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

  17. #17 All Proof Decks

    Based in Orange, 37 mi away

    50/100CR Score

    Ranked #17 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

  19. #19 QXO (Waterproofing)

    Based in Placentia, 34 mi away

    50/100CR Score

    Ranked #19 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

  24. #24 Dexterous Hot Mop

    Based in Rancho Cucamonga, 12 mi away

    49/100CR Score

    Ranked #24 because of its Google rating and trade focus: 4.6★ from 18 Google reviews, listed on Google as “Bathroom remodeler”.

    • 4.6★ from 18 Google reviews
    Hours
    Mon–Fri 6:30 AM–6:30 PM · Sat 7:30 AM–5 PM · Sun closed
    Address
    7423 Ethan Ct, Rancho Cucamonga, CA 91730
    View profile for Dexterous Hot Mop(909) 917-4100

  25. #25 DSM

    Based in Chino, 21 mi away

    49/100CR Score

    Ranked #25 because of its Google rating and trade focus: 3.7★ from 3 Google reviews, listed on Google as “Waterproofing service”.

    • 3.7★ from 3 Google reviews
    Hours
    Mon–Fri 8 AM–5:30 PM · Sat–Sun closed
    Address
    13945 Magnolia Ave, Chino, CA 91710
    View profile for DSM(909) 464-1991

How much do foundation repair companies cost in Muscoy?

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

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

How we ranked Muscoy foundation repair companies

We scored 68 Muscoy 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 Muscoy 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 Muscoy: frequently asked questions

Who is the best foundation repair company in Muscoy?

By CR Score, the highest-ranked foundation repair company in Muscoy, CA is Dalinghaus Foundation Repair with a CR Score of 59/100. It has 4.9★ from 733 Google reviews. It is open 24/7. American Decking and Waterproofing Company (#2) and Groundworks (#3) follow. We ranked 68 foundation repair companies on ten factors, last updated October 22, 2026.

How many foundation repair companies are there in Muscoy?

ContractorsRanked ranks 68 foundation repair companies serving Muscoy, CA. Counts are as of October 2026.

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

8 ranked foundation repair companies in Muscoy post 24/7 hours. The highest-ranked are Dalinghaus Foundation Repair (#1), Double Eagle Roofing & Waterproofing (#6) and Cabral Roofing & Waterproofing (#12). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which foundation repair companies in Muscoy work on weekends?

42 of 68 ranked foundation repair companies post Saturday hours and 24 post Sunday hours. The highest-ranked open Saturdays are Dalinghaus Foundation Repair (#1), Groundworks (#3) and Pro-Seal Systems (#4). Posted hours are office hours; crews may book weekend jobs separately.

How much does foundation repair cost in Muscoy?

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

What Google rating do Muscoy foundation repair companies have?

The median Google rating among 68 rated foundation repair companies in Muscoy is 4.9★, 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 Muscoy count in this ranking?

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

  1. October 2026: CR Scores recalculated for 68 foundation repair companies serving Muscoy.

More foundation repair companies and Muscoy pages

Other trades in Muscoy