86/100CR Score
Ranked #1 because of its Google rating and availability: 5.0★ from 258 Google reviews, open 24/7.
- 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 Simi Valley, CA (2026)
141 foundation repair companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Simi Valley: Green Ladder Roofing and Waterproofing, CR Score 86/100; 5.0★ from 258 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Foundation Installation, posts 24/7 hours; ranked #2 of 141.
- 14
Most-reviewed: Sunshine Foundation Repairs, 420 Google reviews at 5.0★, the most of 141 ranked; ranked #14.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
141 Simi Valley foundation repair companies are ranked here by CR Score, from 8 published factors. 20 are open 24/7, 91 open Saturdays and 64 open Sundays, based on posted hours. The median Google rating is 5.0★ across 141 rated businesses.
Top 10 foundation repair companies in Simi Valley at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Green Ladder Roofing and Waterproofing | 86 | 5.0★ (258) | Pasadena, 38 mi away | 24/7 | Overall |
| 2 | Foundation Installation | 85 | 4.8★ (62) | Encino, 15 mi away | 24/7 | Emergencies |
| 3 | Surfacing And Waterproofing | 84 | 5.0★ (55) | Canoga Park, 12 mi away | Sun · Evenings | — |
| 4 | Solid Foundations Concrete | 84 | 4.7★ (55) | Van Nuys, 20 mi away | 24/7 | — |
| 5 | LA Foundation Repair Los Angeles | 83 | 5.0★ (34) | Beverly Hills, 27 mi away | 24/7 | — |
| 6 | Dalinghaus Foundation Repair | 83 | 4.8★ (9) | Westlake Village, 8 mi away | 24/7 | — |
| 7 | Waterproofing N Roofing - IHC Group | 82 | 5.0★ (44) | Los Angeles, 17 mi away | Sun · Evenings | — |
| 8 | Green Advisor Inc. | 81 | 5.0★ (253) | Los Angeles, 28 mi away | Sat · Sun · Evenings | — |
| 9 | Attic Masters Insulation Services | 81 | 4.8★ (48) | Sherman Oaks, 20 mi away | 24/7 | — |
| 10 | Absolute Maintenance & Consulting | 81 | 4.8★ (73) | Los Angeles, 27 mi away | 24/7 | — |
The 141 best foundation repair companies in Simi Valley, ranked
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Scores below: based on 6 of 8 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Based in Encino, 15 mi away
85/100CR ScoreRanked #2 because of its Google rating and availability: 4.8★ from 62 Google reviews, open 24/7.
- 4.8★ from 62 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 18740 Ventura Blvd, Tarzana, CA 91356
Based in Canoga Park, 12 mi away
84/100CR ScoreRanked #3 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 Van Nuys, 20 mi away
84/100CR ScoreRanked #4 because of its Google rating and availability: 4.7★ from 55 Google reviews, open 24/7.
- 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 Beverly Hills, 27 mi away
83/100CR ScoreRanked #5 because of its Google rating and availability: 5.0★ from 34 Google reviews, open 24/7.
- 5.0★ from 34 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Westlake Village, 8 mi away
83/100CR ScoreRanked #6 because of its Google rating and availability: 4.8★ from 9 Google reviews, open 24/7.
- 4.8★ from 9 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2945 Townsgate Rd STE 200, Westlake Village, CA 91361
Based in Los Angeles, 17 mi away
82/100CR ScoreRanked #7 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 Los Angeles, 28 mi away
81/100CR ScoreRanked #8 because of its Google rating and review volume: 5.0★ from 253 Google reviews, 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 Sherman Oaks, 20 mi away
81/100CR ScoreRanked #9 because of its Google rating and availability: 4.8★ from 48 Google reviews, open 24/7.
- 4.8★ from 48 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 15207 Hesby St, Sherman Oaks, CA 91403
Based in Los Angeles, 27 mi away
81/100CR ScoreRanked #10 because of its Google rating and availability: 4.8★ from 73 Google reviews, open 24/7.
- 4.8★ from 73 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 3520 Overland Ave #A29, Los Angeles, CA 90034
Based in Simi Valley
81/100CR ScoreRanked #11 because of its Google rating and availability: 4.9★ from 34 Google reviews, open 7 days a week.
- 4.9★ from 34 Google reviews
- Hours
- Mon–Sun 7 AM–7 PM
- Address
- 2133 First St, Simi Valley, CA 93065
#12 ZeroVap
Based in Van Nuys, 20 mi away
81/100CR ScoreRanked #12 because of its Google rating and availability: 5.0★ from 27 Google reviews, open 24/7.
- 5.0★ from 27 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 15207 Hesby St, Van Nuys, CA 91403
Based in Woodland Hills, 10 mi away
81/100CR ScoreRanked #13 because of its Google rating and availability: 5.0★ from 53 Google reviews, open 7 days a week.
- 5.0★ from 53 Google reviews
- Hours
- Mon–Sun 7 AM–7 PM
- Address
- 5323 Blanco Ave, Woodland Hills, CA 91367
Based in Northridge, 15 mi away
80/100CR ScoreRanked #14 because of its Google rating and review volume: 5.0★ from 420 Google reviews, the most Google reviews on this list (420).
- 5.0★ from 420 Google reviews
- Hours
- Mon–Thu 9 AM–6 PM · Fri 9 AM–5 PM · Sat–Sun closed
- Address
- 18327 Napa St, Northridge, CA 91325
Based in Chatsworth, 10 mi away
80/100CR ScoreRanked #15 because of its Google rating and availability: 5.0★ from 36 Google reviews, open 7 days a week.
- 5.0★ from 36 Google reviews
- Hours
- Mon–Sun 7 AM–7 PM
- Address
- 21920 Nordhoff St, Chatsworth, CA 91311
Based in Sunland, 27 mi away
79/100CR ScoreRanked #16 because of its Google rating and review volume: 4.8★ from 194 Google reviews, 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
Based in Los Angeles, 27 mi away
79/100CR ScoreRanked #17 because of its Google rating and availability: 5.0★ from 24 Google reviews, open 24/7.
- 5.0★ from 24 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 8322 Beverly Blvd #301, Los Angeles, CA 90048
Based in Chatsworth, 16 mi away
79/100CR ScoreRanked #18 because of its Google rating and availability: 5.0★ from 10 Google reviews, open 24/7.
- 5.0★ from 10 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- #11824, Granada Hills, CA 91344
Based in La Crescenta-Montrose, 31 mi away
79/100CR ScoreRanked #19 because of its Google rating and availability: 4.7★ from 12 Google reviews, open 24/7.
- 4.7★ from 12 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2852 Foothill Blvd, La Crescenta-Montrose, CA 91214
#20 Ihc Group
Based in Canoga Park, 11 mi away
79/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.6★ from 9 Google reviews, listed on Google as “Waterproofing service”.
- 4.6★ from 9 Google reviews
- Hours
- Mon–Thu 7 AM–7 PM · Fri 7 AM–2 PM · Sat closed · Sun 7 AM–7 PM
- Address
- 7736 Deering Ave SUIT B, Canoga Park, CA 91304
Based in Los Angeles, 32 mi away
79/100CR ScoreRanked #21 because of its Google rating and review volume: 5.0★ from 100 Google reviews, 100 Google reviews.
- 5.0★ from 100 Google reviews
- Hours
- Mon–Sun 7 AM–10 PM
- Address
- 3108 Glendale Blvd, Los Angeles, CA 90039
#22 Fix-All 123
Based in Lancaster, 23 mi away
79/100CR ScoreRanked #22 because of its Google rating and review volume: 5.0★ from 223 Google reviews, 223 Google reviews.
- 5.0★ from 223 Google reviews
- Hours
- Mon–Sat 8 AM–10 PM · Sun closed
Based in Burbank, 27 mi away
79/100CR ScoreRanked #23 because of its Google rating and availability: 4.9★ from 60 Google reviews, open 7 days a week.
- 4.9★ from 60 Google reviews
- Hours
- Mon–Sun 10 AM–6 PM
Based in Santa Clarita, 16 mi away
79/100CR ScoreRanked #24 because of its Google rating and availability: 5.0★ from 8 Google reviews, open 24/7.
- 5.0★ from 8 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 24328 Walnut St, Santa Clarita, CA 91321
Based in Burbank, 24 mi away
79/100CR ScoreRanked #25 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
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 141 ranked foundation repair companies here; the rest are on their profiles.
Also serving Simi Valley
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 |
|---|---|---|
| Advanced Support Technology | In Simi Valley | |
| All Seasons Foundation Repair | 5.0★ (2) | 8 mi |
| Bañaga & Associates Painting Co., Inc. | 5.0★ (3) | In Simi Valley |
| Butayi Painting and Decorating | 5.0★ (1) | In Simi Valley |
| Cal Pacific Concrete | In Simi Valley | |
| Channel Islands Roofing Inc | 5.0★ (2) | 22 mi |
| Coast Construction & Foundation Repair | 5.0★ (2) | 19 mi |
| Cutting Edge Concrete Cutting | In Simi Valley | |
| Firstchoice Foundation & Retrofitting Repair | 5.0★ (2) | 25 mi |
| Foundation Repair Experts | 5.0★ (2) | 22 mi |
| homes reimagined construction Inc. | In Simi Valley | |
| Jeffrey Frankel Plumbing Inc | 4.7★ (11) | In Simi Valley |
| JLemos Builders | 5.0★ (2) | 11 mi |
| Nelson's Concrete Drilling & Sawing | In Simi Valley | |
| Pegasus Leak Detection | In Simi Valley | |
| Ramsay One Construction | 5.0★ (1) | In Simi Valley |
| RJG Construction Company | 5.0★ (1) | In Simi Valley |
| Superlative Builders Inc | In Simi Valley | |
| The fireman construction inc | In Simi Valley | |
| Uppacott Legacy Inc. | 5.0★ (3) | In Simi Valley |
How much do foundation repair companies cost in Simi Valley?
National price ranges in USD, not adjusted for Simi Valley. 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 Simi Valley foundation repair companies
We scored 141 Simi Valley foundation repair companies on 8 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. Unknown factors are left out of the score, 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.
| Factor | Weight | Computed from | In Simi Valley data |
|---|---|---|---|
| Reputation | 35% | Bayesian-adjusted Google star rating | Measured |
| Credentials | 15% | Active state license 0.6, bond 0.2, workers’ comp 0.2 | Not yet collected |
| Review volume | 10% | log10(reviews + 1) against the list maximum | Measured |
| Recency | 10% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 10% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | Google main category 1.0, business name 0.7, additional category 0.5 | Measured |
| Proximity | 5% | 1.0 when based in the city, falling to 0 at the trade’s radius | Measured |
| Completeness | 5% | Website, photos, description, hours, claimed profile (0.2 each) | Measured |
Foundation repair companies in Simi Valley: frequently asked questions
Who is the best foundation repair company in Simi Valley?
By CR Score, the highest-ranked foundation repair company in Simi Valley, CA is Green Ladder Roofing and Waterproofing with a CR Score of 86/100. It has 5.0★ from 258 Google reviews. It is open 24/7. Foundation Installation (#2) and Surfacing And Waterproofing (#3) follow. We ranked 141 foundation repair companies on 8 factors, last updated October 22, 2026.
How many foundation repair companies are there in Simi Valley?
ContractorsRanked ranks 141 foundation repair companies serving Simi Valley, CA. 3 of them are based in Simi Valley; 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 Simi Valley are open 24/7?
20 ranked foundation repair companies in Simi Valley post 24/7 hours. The highest-ranked are Green Ladder Roofing and Waterproofing (#1), Foundation Installation (#2) and Solid Foundations Concrete (#4). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which foundation repair companies in Simi Valley work on weekends?
91 of 141 ranked foundation repair companies post Saturday hours and 64 post Sunday hours. The highest-ranked open Saturdays are Green Ladder Roofing and Waterproofing (#1), Foundation Installation (#2) and Solid Foundations Concrete (#4). Posted hours are office hours; crews may book weekend jobs separately.
How much does foundation repair cost in Simi Valley?
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 Simi Valley. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Simi Valley foundation repair companies have?
The median Google rating among 141 rated foundation repair companies in Simi Valley is 5.0★, with a median of 16 reviews. Sunshine Foundation Repairs has the most, 420 reviews, and ranks #14. 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 8 published factors, led by reputation (35%), credentials (15%), review volume (10%) and recency (10%). Factors we cannot measure are left out, not scored as zero. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.
Do foundation repair companies outside Simi Valley count in this ranking?
Yes, if they are within 40 mi of the Simi Valley 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 Simi Valley
- October 2026: CR Scores recalculated for 141 foundation repair companies serving Simi Valley.
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