Ranked #1 because of its Google rating and review volume: 4.9★ from 208 Google reviews.
- 4.9★ from 208 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 822 Joshua Dr, Windsor, CA 95492
25 foundation repair companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Calistoga: Roof Doctors Sonoma County, CR Score 58/100; 4.9★ from 208 Google reviews; open 24/7.
Best for emergencies (open 24/7): Sustainable Living Builders, Inc, posts 24/7 hours; ranked #2 of 25.
Most-reviewed: Groundworks, 575 Google reviews at 4.8★, the most of 25 ranked; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
25 Calistoga foundation repair companies are ranked here by CR Score, from ten published factors. 2 are open 24/7, 11 open Saturdays and 6 open Sundays, based on posted hours. The median Google rating is 4.8★ across 25 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Roof Doctors Sonoma County | 58 | 4.9★ (208) | Windsor, 13 mi away | 24/7 | Overall |
| 2 | Sustainable Living Builders, Inc | 55 | 4.9★ (84) | Sebastopol, 18 mi away | 24/7 | Emergencies |
| 3 | Groundworks | 54 | 4.8★ (575) | Fairfield, 36 mi away | Sat · Sun · Evenings | Most reviews |
| 4 | Under The House. | 54 | 5.0★ (62) | Santa Rosa, 14 mi away | Sat · Sun · Evenings | — |
| 5 | Modern Summit Roofing Contractor | 53 | 5.0★ (47) | Petaluma, 14 mi away | Sat · Sun · Evenings | — |
| 6 | Rich’s Mobile Home Service | 51 | 4.5★ (27) | Santa Rosa, 12 mi away | Sat · Sun · Evenings | — |
| 7 | Aleman Concrete | 51 | 5.0★ (27) | Santa Rosa, 9 mi away | Sat · Evenings | — |
| 8 | Xalos Foundation Support | 51 | 5.0★ (27) | Windsor, 14 mi away | — | — |
| 9 | Crandall Roofing, Inc. | 51 | 4.9★ (117) | Santa Rosa, 15 mi away | — | — |
| 10 | Clean CrawlSpace Inc. | 50 | 5.0★ (57) | Santa Rosa, 15 mi away | — | — |
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.
Ranked #1 because of its Google rating and review volume: 4.9★ from 208 Google reviews.
Based in Sebastopol, 18 mi away
Ranked #2 because of its Google rating and review volume: 4.9★ from 84 Google reviews.
Based in Fairfield, 36 mi away
Ranked #3 because of its Google rating and review volume: 4.8★ from 575 Google reviews, the most in Calistoga.
Based in Santa Rosa, 14 mi away
Ranked #4 because of its Google rating and review volume: 5.0★ from 62 Google reviews.
Based in Petaluma, 14 mi away
Ranked #5 because of its Google rating and review volume: 5.0★ from 47 Google reviews.
Based in Santa Rosa, 12 mi away
Ranked #6 because of its Google rating and review volume: 4.5★ from 27 Google reviews.
Based in Santa Rosa, 9 mi away
Ranked #7 because of its Google rating and review volume: 5.0★ from 27 Google reviews.
Based in Windsor, 14 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 27 Google reviews, listed on Google as “Concrete contractor”.
Based in Santa Rosa, 15 mi away
Ranked #9 because of its Google rating and review volume: 4.9★ from 117 Google reviews.
Based in Santa Rosa, 15 mi away
Ranked #10 because of its Google rating and review volume: 5.0★ from 57 Google reviews.
Based in Cotati, 17 mi away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 19 Google reviews, listed on Google as “Construction company”.
Based in Petaluma, 24 mi away
Ranked #12 because of its Google rating and trade focus: 3.0★ from 4 Google reviews, listed on Google as “Waterproofing service”.
Based in Santa Rosa, 14 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “Concrete contractor”.
Based in Novato, 35 mi away
Ranked #14 because of its Google rating and trade focus: 4.2★ from 5 Google reviews, listed on Google as “Waterproofing service”.
Based in Benicia, 26 mi away
Ranked #15 because of its Google rating and trade focus: 4.1★ from 31 Google reviews, listed on Google as “Concrete contractor”.
Based in Vacaville, 36 mi away
Ranked #16 because of its Google rating and review volume: 4.7★ from 107 Google reviews.
Based in Rohnert Park, 5 mi away
Ranked #17 because of its Google rating and trade focus: 4.2★ from 5 Google reviews, listed on Google as “Roofing contractor”.
Based in Santa Rosa, 13 mi away
Ranked #18 because of its Google rating and trade focus: 4.0★ from 4 Google reviews, listed on Google as “General contractor”.
Based in Petaluma, 27 mi away
Ranked #19 because of its Google rating and trade focus: 4.6★ from 7 Google reviews, listed on Google as “Roofing contractor”.
Based in Santa Rosa, 14 mi away
Ranked #20 because of its Google rating and trade focus: 4.1★ from 9 Google reviews, listed on Google as “Roofing contractor”.
Based in San Rafael, 39 mi away
Ranked #21 because of its Google rating and review volume: 4.8★ from 30 Google reviews.
Based in Larkfield-Wikiup, 17 mi away
Ranked #22 because of its Google rating and trade focus: 3.6★ from 5 Google reviews, listed on Google as “Landscaper”.
Based in San Rafael, 40 mi away
Ranked #23 because of its Google rating and trade focus: 4.0★ from 8 Google reviews, listed on Google as “General contractor”.
Based in Corte Madera, 36 mi away
Ranked #24 because of its Google rating and trade focus: 4.9★ from 10 Google reviews, listed on Google as “Plumber”.
Based in Winters, 33 mi away
Ranked #25 because of its Google rating and trade focus: 3.3★ from 3 Google reviews, listed on Google as “Concrete contractor”.
14 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.S.A. Drilling and Foundation | 27 mi | |
| Acecal Waterproofing & Decking | 1.0★ (1) | 26 mi |
| Adams Roofing | 24 mi | |
| Blakeley Construction Inc | 4.4★ (7) | In Calistoga |
| Certified Specialists, Inc. | 5.0★ (2) | 15 mi |
| Dan Fix Landscape Construction Co. | 39 mi | |
| DWC Waterproofing | 5.0★ (1) | 39 mi |
| Everest Roofing | 39 mi | |
| Foundation Repair of CA | 5.0★ (1) | 17 mi |
| GD & Son Builders | 38 mi | |
| North Coast Waterproofing Inc | 21 mi | |
| Restoration brothers -Water & Fire damaged services | 5.0★ (2) | In Calistoga |
| Thoroughbred WaterProofing | 5.0★ (1) | 12 mi |
| Zarate concrete | 36 mi |
National price ranges in USD, not adjusted for Calistoga. 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 |
We scored 25 Calistoga 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 Calistoga 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 |