61/100CR Score
Ranked #1 because of its Google rating and review volume: 5.0★ from 258 Google reviews.
- 5.0★ from 258 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 155 N Lake Ave Suite 800,874, Pasadena, CA 91101
Best Foundation Repair Companies in Monrovia, CA (2026)
248 foundation repair companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Monrovia: Green Ladder Roofing and Waterproofing, CR Score 61/100; 5.0★ from 258 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Professional Foundation Repair, posts 24/7 hours; ranked #2 of 248.
- 25
Most-reviewed: Saber, 1,011 Google reviews at 4.9★, the most of 248 ranked; ranked #25.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
248 Monrovia foundation repair companies are ranked here by CR Score, from ten published factors. 36 are open 24/7, 159 open Saturdays and 102 open Sundays, based on posted hours. The median Google rating is 5.0★ across 248 rated businesses.
Top 10 foundation repair companies in Monrovia at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Green Ladder Roofing and Waterproofing | 61 | 5.0★ (258) | Pasadena, 8 mi away | 24/7 | Overall |
| 2 | Professional Foundation Repair | 58 | 4.9★ (216) | Garden Grove, 25 mi away | 24/7 | Emergencies |
| 3 | Infinity Shower Pans | 57 | 5.0★ (17) | Whittier, 16 mi away | Sat · Sun · Evenings | — |
| 4 | Pro-Seal Systems | 57 | 5.0★ (9) | Glendora, 8 mi away | Sat · Sun | — |
| 5 | Waterproofing N Roofing - IHC Group | 55 | 5.0★ (44) | Los Angeles, 28 mi away | Sun · Evenings | — |
| 6 | Home Renew 360 Roofing I Construction I Energy | 55 | 4.8★ (705) | Long Beach, 25 mi away | Sat · Sun | — |
| 7 | Green Advisor Inc. | 55 | 5.0★ (253) | Los Angeles, 21 mi away | Sat · Sun · Evenings | — |
| 8 | Always Roofing & Waterproofing Corp. | 55 | 5.0★ (16) | Los Angeles, 13 mi away | 24/7 | — |
| 9 | Surfacing And Waterproofing | 55 | 5.0★ (55) | Canoga Park, 34 mi away | Sun · Evenings | — |
| 10 | Ojeda Hot Mop Shower Pans | 55 | 5.0★ (7) | Glendora, 9 mi away | Sat | — |
The 248 best foundation repair companies in Monrovia, 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.
Based in Garden Grove, 25 mi away
58/100CR ScoreRanked #2 because of its Google rating and review volume: 4.9★ from 216 Google reviews.
- 4.9★ from 216 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 7441 Anaconda Ave, Garden Grove, CA 92841
Based in Whittier, 16 mi away
57/100CR ScoreRanked #3 because of its Google rating and trade focus: 5.0★ from 17 Google reviews, listed on Google as “Waterproofing service”.
- 5.0★ from 17 Google reviews
- Hours
- Mon–Sun 8 AM–8 PM
- Address
- 14445 Tedford Dr, Whittier, CA 90604
Based in Glendora, 8 mi away
57/100CR ScoreRanked #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
Based in Los Angeles, 28 mi away
55/100CR ScoreRanked #5 because of its Google rating and trade focus: 5.0★ from 44 Google reviews, listed on Google as “Waterproofing service”.
- 5.0★ from 44 Google reviews
- Hours
- Mon–Thu 6 AM–7 PM · Fri 6 AM–2 PM · Sat closed · Sun 7 AM–7 PM
- Address
- 7516 Valjean Ave, Los Angeles, CA 91406
Based in Long Beach, 25 mi away
55/100CR ScoreRanked #6 because of its Google rating and review volume: 4.8★ from 705 Google reviews.
- 4.8★ from 705 Google reviews
- Hours
- Mon–Sun 8:30 AM–5 PM
- Address
- 1500 W Carson St Suite 201, Long Beach, CA 90810
Based in Los Angeles, 21 mi away
55/100CR ScoreRanked #7 because of its Google rating and review volume: 5.0★ from 253 Google reviews.
- 5.0★ from 253 Google reviews
- Hours
- Mon–Fri 8 AM–7 PM · Sat 9 AM–5 PM · Sun 8 AM–7 PM
- Address
- 7660 Beverly Blvd, Los Angeles, CA 90036
Based in Los Angeles, 13 mi away
55/100CR ScoreRanked #8 because of its Google rating and trade focus: 5.0★ from 16 Google reviews, listed on Google as “Roofing contractor”.
- 5.0★ from 16 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 231 N Record Ave, Los Angeles, CA 90063
Based in Canoga Park, 34 mi away
55/100CR ScoreRanked #9 because of its Google rating and trade focus: 5.0★ from 55 Google reviews, listed on Google as “Waterproofing service”.
- 5.0★ from 55 Google reviews
- Hours
- Mon–Thu 6 AM–7 PM · Fri 6 AM–2 PM · Sat closed · Sun 7 AM–7 PM
- Address
- 21304 Hart St, Canoga Park, CA 91303
Based in Glendora, 9 mi away
55/100CR ScoreRanked #10 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “Waterproofing service”.
- 5.0★ from 7 Google reviews
- Hours
- Mon–Sat 8 AM–5 PM · Sun closed
- Address
- 854 E Meda Ave, Glendora, CA 91741
Based in Burbank, 21 mi away
55/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.6★ from 48 Google reviews, listed on Google as “Waterproofing service”.
- 4.6★ from 48 Google reviews
- Hours
- Mon–Fri 8 AM–3 PM · Sat 9 AM–4 PM · Sun closed
- Address
- 10771 Sherman Way, Sun Valley, CA 91352
Based in Beverly Hills, 25 mi away
54/100CR ScoreRanked #12 because of its Google rating and trade focus: 5.0★ from 34 Google reviews, listed on Google as “General contractor”.
- 5.0★ from 34 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Huntington Beach, 29 mi away
54/100CR ScoreRanked #13 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
Based in Van Nuys, 26 mi away
54/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.7★ from 55 Google reviews, listed on Google as “General contractor”.
- 4.7★ from 55 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 14349 Victory Blvd, Van Nuys, CA 91401
Based in Pasadena, 8 mi away
54/100CR ScoreRanked #15 because of its Google rating and availability: 5.0★ from 26 Google reviews, open 24/7.
- 5.0★ from 26 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 35 N Lake Ave 7th floor suite 22, Pasadena, CA 91101
Based in Los Angeles, 15 mi away
54/100CR ScoreRanked #16 because of its Google rating and review volume: 5.0★ from 100 Google reviews.
- 5.0★ from 100 Google reviews
- Hours
- Mon–Sun 7 AM–10 PM
- Address
- 3108 Glendale Blvd, Los Angeles, CA 90039
Based in Encino, 31 mi away
54/100CR ScoreRanked #17 because of its Google rating and trade focus: 4.8★ from 62 Google reviews, listed on Google as “General contractor”.
- 4.8★ from 62 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 18740 Ventura Blvd, Tarzana, CA 91356
Based in Glendale, 15 mi away
54/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.7★ from 10 Google reviews, listed on Google as “Waterproofing service”.
- 4.7★ from 10 Google reviews
- Hours
- Mon–Sat 8 AM–6 PM · Sun closed
- Address
- 611 N Brand Blvd Suite 1300, Glendale, CA 91203
Based in Los Angeles, 13 mi away
54/100CR ScoreRanked #19 because of its Google rating and review volume: 4.9★ from 92 Google reviews.
- 4.9★ from 92 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 124 E Avenue 40, Los Angeles, CA 90031
Based in San Dimas, 11 mi away
54/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.6★ from 9 Google reviews, listed on Google as “Roofing contractor”.
- 4.6★ from 9 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 675 W Terrace Dr, San Dimas, CA 91773
Based in Glendora, 7 mi away
54/100CR ScoreRanked #21 because of its Google rating and availability: 5.0★ from 21 Google reviews, open 24/7.
- 5.0★ from 21 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1025 W Arrow Hwy, Glendora, CA 91740
Based in La Crescenta-Montrose, 15 mi away
54/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.7★ from 12 Google reviews, listed on Google as “Demolition contractor”.
- 4.7★ from 12 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2852 Foothill Blvd, La Crescenta-Montrose, CA 91214
#23 DK Shower Pans
Based in Norwalk, 17 mi away
54/100CR ScoreRanked #23 because of its Google rating and trade focus: 5.0★ from 10 Google reviews, listed on Google as “Waterproofing service”.
- 5.0★ from 10 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat 8 AM–12 PM · Sun closed
- Address
- 14006 Gracebee Ave, Norwalk, CA 90650
Based in Sunland, 20 mi away
54/100CR ScoreRanked #24 because of its Google rating and review volume: 4.8★ from 194 Google reviews.
- 4.8★ from 194 Google reviews
- Hours
- Mon–Fri 8 AM–6 PM · Sat 9 AM–12 PM · Sun 8 AM–12 PM
- Address
- 8334 Foothill Blvd, Sunland, CA 91040
#25 Saber
Based in Paramount, 20 mi away
54/100CR ScoreRanked #25 because of its Google rating and review volume: 4.9★ from 1,011 Google reviews, the most in Monrovia.
- 4.9★ from 1,011 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat–Sun closed
- Address
- 7301 Madison St, Paramount, CA 90723
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 248 ranked foundation repair companies here; the rest are on their profiles.
Also serving Monrovia
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.
| Business | Google rating | Distance |
|---|---|---|
| 2Gun Roofing & Waterproofing | 5.0★ (2) | 25 mi |
| A-Z Foundation Contractors | 5.0★ (2) | 27 mi |
| ACE Restoration & Waterproofing, Inc. | 5.0★ (2) | 22 mi |
| Builders Trust Construction | 5.0★ (2) | 23 mi |
| CALIFORNIA ROOF COATINGS | 4.0★ (2) | 18 mi |
| Cell-Crete Corporation - Cellular Concrete | In Monrovia | |
| Cis Roofing Waterproofing Solar | 5.0★ (2) | 11 mi |
| Dominguez Construction | 3.0★ (2) | 5 mi |
| EFP waterproofing | 5.0★ (2) | 27 mi |
| Firstchoice Foundation & Retrofitting Repair | 5.0★ (2) | 28 mi |
| Foundation Repair Experts | 5.0★ (2) | 32 mi |
| Innovative Painting & Waterproofing | 5.0★ (2) | 17 mi |
| LA Deck and Balcony | 5.0★ (2) | 20 mi |
| Martin's Concrete Pumping | In Monrovia | |
| Slater Waterproofing Inc | 3.0★ (2) | 19 mi |
| Thomas Murray Waterproofing and Roofing | 4.5★ (2) | 33 mi |
| Washing Raccoons | 5.0★ (2) | 31 mi |
| Waterproofing and Roofing Solutions, Inc. | 5.0★ (2) | 25 mi |
| White Castle Construction | 5.0★ (2) | 20 mi |
| Zerik Scales | 5.0★ (2) | 22 mi |
How much do foundation repair companies cost in Monrovia?
National price ranges in USD, not adjusted for Monrovia. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Foundation repair | $2,225 | $5,174 | $8,133 | Per project: typical range of customer-reported repairs. US national range | October 2026 |
How we ranked Monrovia foundation repair companies
We scored 248 Monrovia 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 23, 2026.
Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In Monrovia data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |
Foundation repair companies in Monrovia: frequently asked questions
Who is the best foundation repair company in Monrovia?
By CR Score, the highest-ranked foundation repair company in Monrovia, CA is Green Ladder Roofing and Waterproofing with a CR Score of 61/100. It has 5.0★ from 258 Google reviews. It is open 24/7. Professional Foundation Repair (#2) and Infinity Shower Pans (#3) follow. We ranked 248 foundation repair companies on ten factors, last updated October 23, 2026.
How many foundation repair companies are there in Monrovia?
ContractorsRanked ranks 248 foundation repair companies serving Monrovia, CA. Another 20 within 40 mi are listed but not ranked yet. Counts are as of October 2026.
Which foundation repair companies in Monrovia are open 24/7?
36 ranked foundation repair companies in Monrovia post 24/7 hours. The highest-ranked are Green Ladder Roofing and Waterproofing (#1), Professional Foundation Repair (#2) and Always Roofing & Waterproofing Corp. (#8). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which foundation repair companies in Monrovia work on weekends?
159 of 248 ranked foundation repair companies post Saturday hours and 102 post Sunday hours. The highest-ranked open Saturdays are Green Ladder Roofing and Waterproofing (#1), Professional Foundation Repair (#2) and Infinity Shower Pans (#3). Posted hours are office hours; crews may book weekend jobs separately.
How much does foundation repair cost in Monrovia?
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 Monrovia. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Monrovia foundation repair companies have?
The median Google rating among 248 rated foundation repair companies in Monrovia is 5.0★, with a median of 15 reviews. Saber has the most, 1,011 reviews, and ranks #25. 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 Monrovia count in this ranking?
Yes, if they are within 40 mi of the Monrovia 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 Monrovia
- October 2026: CR Scores recalculated for 248 foundation repair companies serving Monrovia.
- October 2026: 1 duplicate listing merged.
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