57/100CR Score
Ranked #1 because of its Google rating and review volume: 4.8★ from 1,938 Google reviews, the most in Fairfax.
- 4.8★ from 1,938 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 718 Douglas Ave, Oakland, CA 94603
Best Foundation Repair Companies in Fairfax, CA (2026)
103 foundation repair companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Fairfax: Attic Pros, CR Score 57/100; 4.8★ from 1,938 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Roof Doctors Marin County, posts 24/7 hours; ranked #2 of 103.
- 4
Most-reviewed: Groundworks, 575 Google reviews at 4.8★, the most of 103 ranked after Attic Pros; ranked #4.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
103 Fairfax foundation repair companies are ranked here by CR Score, from ten published factors. 12 are open 24/7, 55 open Saturdays and 31 open Sundays, based on posted hours. The median Google rating is 4.8★ across 103 rated businesses.
Top 10 foundation repair companies in Fairfax at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Attic Pros | 57 | 4.8★ (1,938) | Oakland, 28 mi away | 24/7 | Overall |
| 2 | Roof Doctors Marin County | 54 | 4.6★ (40) | Fairfax | 24/7 | Emergencies |
| 3 | Gotham Home Services | 53 | 5.0★ (33) | Dublin, 12 mi away | 24/7 | — |
| 4 | Groundworks | 53 | 4.8★ (575) | Fairfield, 33 mi away | Sat · Sun · Evenings | Most reviews |
| 5 | Roof Doctors Contra Costa County | 52 | 4.8★ (188) | Alamo, 33 mi away | 24/7 | — |
| 6 | Sustainable Living Builders, Inc | 52 | 4.9★ (84) | Sebastopol, 28 mi away | 24/7 | — |
| 7 | ROOFWORX Inc. – Licensed Roofing Contractor in San Francisco | 52 | 4.9★ (98) | San Francisco, 21 mi away | 24/7 | — |
| 8 | Bay Area Moisture Control | 51 | 4.2★ (5) | Novato, 7 mi away | — | — |
| 9 | Roof Doctors Alameda County | 51 | 5.0★ (87) | Alameda, 37 mi away | 24/7 | — |
| 10 | Pablo Restorations Roofing | 51 | 5.0★ (29) | Richmond, 13 mi away | Sat · Sun | — |
The 103 best foundation repair companies in Fairfax, 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 Fairfax
54/100CR ScoreRanked #2 because of its Google rating and availability: 4.6★ from 40 Google reviews, open 24/7.
- 4.6★ from 40 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Dublin, 12 mi away
53/100CR ScoreRanked #3 because of its Google rating and availability: 5.0★ from 33 Google reviews, open 24/7.
- 5.0★ from 33 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
#4 Groundworks
Based in Fairfield, 33 mi away
53/100CR ScoreRanked #4 because of its Google rating and review volume: 4.8★ from 575 Google reviews.
- 4.8★ from 575 Google reviews
- Hours
- Mon–Fri 4 AM–8 PM · Sat 5 AM–8 PM · Sun 7 AM–8 PM
- Address
- 2333 Courage Dr STE C, Fairfield, CA 94533
Based in Alamo, 33 mi away
52/100CR ScoreRanked #5 because of its Google rating and review volume: 4.8★ from 188 Google reviews.
- 4.8★ from 188 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Sebastopol, 28 mi away
52/100CR ScoreRanked #6 because of its Google rating and review volume: 4.9★ from 84 Google reviews.
- 4.9★ from 84 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 4399 Gravenstein Hwy S, Sebastopol, CA 95472
Based in San Francisco, 21 mi away
52/100CR ScoreRanked #7 because of its Google rating and review volume: 4.9★ from 98 Google reviews.
- 4.9★ from 98 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1485 Bayshore Blvd 182 suite 418, San Francisco, CA 94124
Based in Novato, 7 mi away
51/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.2★ from 5 Google reviews, listed on Google as “Waterproofing service”.
- 4.2★ from 5 Google reviews
- Hours
- Mon–Fri 8:30 AM–4:30 PM · Sat–Sun closed
- Address
- 67 Galli Dr Suite C, Novato, CA 94949
Based in Alameda, 37 mi away
51/100CR ScoreRanked #9 because of its Google rating and review volume: 5.0★ from 87 Google reviews.
- 5.0★ from 87 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Richmond, 13 mi away
51/100CR ScoreRanked #10 because of its Google rating and trade focus: 5.0★ from 29 Google reviews, listed on Google as “Roofing contractor”.
- 5.0★ from 29 Google reviews
- Hours
- Mon–Fri 7 AM–6 PM · Sat 7 AM–3 PM · Sun 9 AM–3 PM
- Address
- 2124 Hellings Ave, Richmond, CA 94801
Based in San Francisco, 16 mi away
51/100CR ScoreRanked #11 because of its Google rating and availability: 4.7★ from 19 Google reviews, open 24/7.
- 4.7★ from 19 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 3736 Geary Blvd, San Francisco, CA 94118
Based in San Mateo, 34 mi away
51/100CR ScoreRanked #12 because of its Google rating and review volume: 4.9★ from 153 Google reviews.
- 4.9★ from 153 Google reviews
- Hours
- Mon–Sun 9 AM–6 PM
- Address
- 1900 S Norfolk St #394, San Mateo, CA 94403
#13 Geico Builders
Based in Oakland, 22 mi away
50/100CR ScoreRanked #13 because of its Google rating and review volume: 5.0★ from 87 Google reviews.
- 5.0★ from 87 Google reviews
- Hours
- Mon–Fri 9 AM–7 PM · Sat closed · Sun 9 AM–6 PM
- Address
- 1901 Harrison St Ste 1100, Oakland, CA 94612
Based in San Rafael, 3 mi away
50/100CR ScoreRanked #14 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “General contractor”.
- 5.0★ from 4 Google reviews
- Hours
- Mon–Sat 8 AM–5 PM · Sun closed
- Address
- 710 C St 202, Suite 202, San Rafael, CA 94901
Based in Petaluma, 27 mi away
50/100CR ScoreRanked #15 because of its Google rating and review volume: 5.0★ from 47 Google reviews.
- 5.0★ from 47 Google reviews
- Hours
- Mon–Sun 8 AM–8 PM
Based in Alamo, 35 mi away
50/100CR ScoreRanked #16 because of its Google rating and trade focus: 4.9★ from 62 Google reviews, listed on Google as “Concrete contractor”.
- 4.9★ from 62 Google reviews
- Hours
- Mon–Sat 8 AM–6 PM · Sun closed
Based in San Francisco, 16 mi away
50/100CR ScoreRanked #17 because of its Google rating and trade focus: 5.0★ from 16 Google reviews, listed on Google as “Stucco contractor”.
- 5.0★ from 16 Google reviews
- Hours
- Mon–Sun 7 AM–10 PM
- Address
- 1937 Lombard St Unit A, San Francisco, CA 94123
Based in Pleasant Hill, 29 mi away
50/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.7★ from 48 Google reviews, listed on Google as “Concrete contractor”.
- 4.7★ from 48 Google reviews
- Hours
- Mon–Thu 5 AM–9:30 PM · Fri 5 AM–4:30 PM · Sat closed · Sun 5 AM–9:30 PM
- Address
- 3478 Buskirk Ave, Pleasant Hill, CA 94523
Based in Oakland, 27 mi away
50/100CR ScoreRanked #19 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–Fri 6 AM–3 PM · Sat–Sun closed
- Address
- 465 Roland Way, Oakland, CA 94621
#20 Under The House.
Based in Santa Rosa, 33 mi away
50/100CR ScoreRanked #20 because of its Google rating and review volume: 5.0★ from 62 Google reviews.
- 5.0★ from 62 Google reviews
- Hours
- Mon–Sun 7 AM–7 PM
- Address
- 1133 Piner Creek Dr, Santa Rosa, CA 95401
Based in Oakland, 22 mi away
49/100CR ScoreRanked #21 because of its Google rating and review volume: 4.8★ from 68 Google reviews.
- 4.8★ from 68 Google reviews
- Hours
- Mon–Fri 5 AM–9:30 PM · Sat closed · Sun 5 AM–9:30 PM
- Address
- 330 2nd St, Oakland, CA 94607
Based in San Rafael, 5 mi away
49/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.9★ from 41 Google reviews, listed on Google as “General contractor”.
- 4.9★ from 41 Google reviews
- Hours
- Mon–Fri 7:30 AM–4 PM · Sat–Sun closed
- Address
- 1201 Andersen Dr STE O, San Rafael, CA 94901
Based in San Leandro, 28 mi away
49/100CR ScoreRanked #23 because of its Google rating and availability: 4.8★ from 17 Google reviews, open 24/7.
- 4.8★ from 17 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 466 Whitney St, San Leandro, CA 94577
Based in Walnut Creek, 29 mi away
49/100CR ScoreRanked #24 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Roofing contractor”.
- 5.0★ from 3 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1990 N California Blvd 8th Floor #1270, Walnut Creek, CA 94596
#25 SF Pro Roofing
Based in Daly City, 12 mi away
49/100CR ScoreRanked #25 because of its Google rating and trade focus: 5.0★ from 20 Google reviews, listed on Google as “Roofing contractor”.
- 5.0★ from 20 Google reviews
- Hours
- Mon–Sat 8 AM–5 PM · Sun closed
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 103 ranked foundation repair companies here; the rest are on their profiles.
Also serving Fairfax
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 |
|---|---|---|
| A&J Quality General Construction Services | 5.0★ (2) | 13 mi |
| Artist Touch Construction, Inc. | 5.0★ (5) | In Fairfax |
| Cal Cade Construction | 5.0★ (2) | 18 mi |
| Certified Specialists, Inc. | 5.0★ (2) | 30 mi |
| D L C CONCRETE | 5.0★ (2) | 35 mi |
| Decarbonize Marin | In Fairfax | |
| Developers Plus Inc. | 5.0★ (8) | In Fairfax |
| Elite Roofing & Waterproofing | 3.0★ (2) | 21 mi |
| Golden Gate Termite & Construction | 5.0★ (2) | 15 mi |
| GT Construction | In Fairfax | |
| KH Waterproofing And Restoration | 5.0★ (2) | 20 mi |
| Lone Mountain Homes Inc | 5.0★ (2) | 16 mi |
| Panda Heating & Cooling | 3.5★ (2) | 28 mi |
| Soodo Construction | 5.0★ (2) | 21 mi |
| The Restoration & Waterproofing Co., Inc. | 5.0★ (2) | 16 mi |
| UFcastro painting and waterproofing | 5.0★ (2) | 21 mi |
| Windsor Waterproofing | 5.0★ (2) | 12 mi |
| Wise Roofing Solutions of Concord | 4.0★ (2) | 35 mi |
| Zen Construction Inc | 4.0★ (1) | In Fairfax |
| Zen Construction Inc | In Fairfax |
How much do foundation repair companies cost in Fairfax?
National price ranges in USD, not adjusted for Fairfax. 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 Fairfax foundation repair companies
We scored 103 Fairfax 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.
| Factor | Weight | Computed from | In Fairfax 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 Fairfax: frequently asked questions
Who is the best foundation repair company in Fairfax?
By CR Score, the highest-ranked foundation repair company in Fairfax, CA is Attic Pros with a CR Score of 57/100. It has 4.8★ from 1,938 Google reviews. It is open 24/7. Roof Doctors Marin County (#2) and Gotham Home Services (#3) follow. We ranked 103 foundation repair companies on ten factors, last updated October 22, 2026.
How many foundation repair companies are there in Fairfax?
ContractorsRanked ranks 103 foundation repair companies serving Fairfax, CA. 2 of them are based in Fairfax; 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 Fairfax are open 24/7?
12 ranked foundation repair companies in Fairfax post 24/7 hours. The highest-ranked are Attic Pros (#1), Roof Doctors Marin County (#2) and Gotham Home Services (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which foundation repair companies in Fairfax work on weekends?
55 of 103 ranked foundation repair companies post Saturday hours and 31 post Sunday hours. The highest-ranked open Saturdays are Attic Pros (#1), Roof Doctors Marin County (#2) and Gotham Home Services (#3). Posted hours are office hours; crews may book weekend jobs separately.
How much does foundation repair cost in Fairfax?
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 Fairfax. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Fairfax foundation repair companies have?
The median Google rating among 103 rated foundation repair companies in Fairfax is 4.8★, with a median of 14 reviews. Attic Pros has the most, 1,938 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 Fairfax count in this ranking?
Yes, if they are within 40 mi of the Fairfax 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 Fairfax
- October 2026: CR Scores recalculated for 103 foundation repair companies serving Fairfax.
More foundation repair companies and Fairfax pages
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