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Best Foundation Repair Companies in Grand Terrace, CA (2026)

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

The short answer

  1. 1

    Best overall in Grand Terrace: Dalinghaus Foundation Repair, CR Score 61/100; 4.9★ from 733 Google reviews; open 24/7.

  2. 5

    Best for emergencies (open 24/7): Dalinghaus Foundation Repair, posts 24/7 hours; ranked #5 of 82.

  3. 3

    Most-reviewed: Groundworks, 135 Google reviews at 4.9★, the most of 82 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

82 Grand Terrace foundation repair companies are ranked here by CR Score, from ten published factors. 12 are open 24/7, 52 open Saturdays and 29 open Sundays, based on posted hours. The median Google rating is 4.9★ across 82 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 Grand Terrace at a glance

Top 10 foundation repair companies in Grand Terrace at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1Dalinghaus Foundation Repair614.9★ (733)Lake Elsinore, 24 mi away24/7Overall
2A R SHOWER PANS545.0★ (9)Canyon Lake, 25 mi awaySat · Sun · Evenings—
3Groundworks544.9★ (135)Ontario, 18 mi awaySat · Sun · EveningsMost reviews
4American Decking and Waterproofing Company544.9★ (100)Glendale, 30 mi away——
5Dalinghaus Foundation Repair545.0★ (53)Irvine, 37 mi away24/7Emergencies
6Double Eagle Roofing & Waterproofing545.0★ (3)Riverside, 3 mi away24/7—
7SoCal Surfacing Inc.535.0★ (19)Adelanto, 17 mi away——
8DECKS & CONCRETE SOLUTIONS535.0★ (6)Wildomar, 28 mi awaySat · Sun—
9Pro-Seal Systems535.0★ (9)Glendora, 32 mi awaySat · Sun—
10J P Roofing524.9★ (100)Chino, 16 mi awaySat—

The 82 best foundation repair companies in Grand Terrace, 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.

  2. #2 A R SHOWER PANS

    Based in Canyon Lake, 25 mi away

    54/100CR Score

    Ranked #2 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

  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

  9. #9 Pro-Seal Systems

    Based in Glendora, 32 mi away

    53/100CR Score

    Ranked #9 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

  10. #10 J P Roofing

    Based in Chino, 16 mi away

    52/100CR Score

    Ranked #10 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

  16. #16 All Proof Decks

    Based in Orange, 34 mi away

    51/100CR Score

    Ranked #16 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

  18. #18 Horizon Roofing

    Based in Irvine, 39 mi away

    50/100CR Score

    Ranked #18 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

  22. #22 QXO (Waterproofing)

    Based in Placentia, 32 mi away

    50/100CR Score

    Ranked #22 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

How much do foundation repair companies cost in Grand Terrace?

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

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

How we ranked Grand Terrace foundation repair companies

We scored 82 Grand Terrace 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 Grand Terrace 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 Grand Terrace: frequently asked questions

Who is the best foundation repair company in Grand Terrace?

By CR Score, the highest-ranked foundation repair company in Grand Terrace, 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. A R SHOWER PANS (#2) and Groundworks (#3) follow. We ranked 82 foundation repair companies on ten factors, last updated October 22, 2026.

How many foundation repair companies are there in Grand Terrace?

ContractorsRanked ranks 82 foundation repair companies serving Grand Terrace, CA. Counts are as of October 2026.

Which foundation repair companies in Grand Terrace are open 24/7?

12 ranked foundation repair companies in Grand Terrace post 24/7 hours. The highest-ranked are Dalinghaus Foundation Repair (#1), Dalinghaus Foundation Repair (#5) and Double Eagle Roofing & Waterproofing (#6). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which foundation repair companies in Grand Terrace work on weekends?

52 of 82 ranked foundation repair companies post Saturday hours and 29 post Sunday hours. The highest-ranked open Saturdays are Dalinghaus Foundation Repair (#1), A R SHOWER PANS (#2) and Groundworks (#3). Posted hours are office hours; crews may book weekend jobs separately.

How much does foundation repair cost in Grand Terrace?

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

What Google rating do Grand Terrace foundation repair companies have?

The median Google rating among 82 rated foundation repair companies in Grand Terrace 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 Grand Terrace count in this ranking?

Yes, if they are within 40 mi of the Grand Terrace 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 Grand Terrace

  1. October 2026: CR Scores recalculated for 82 foundation repair companies serving Grand Terrace.

More foundation repair companies and Grand Terrace pages

Other trades in Grand Terrace