62/100CR Score
Ranked #1 because of its Google rating and review volume: 4.9★ from 208 Google reviews, the most in Windsor.
- 4.9★ from 208 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 822 Joshua Dr, Windsor, CA 95492
Best Foundation Repair Companies in Windsor, CA (2026)
21 foundation repair companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Windsor: Roof Doctors Sonoma County, CR Score 62/100; 4.9★ from 208 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Sustainable Living Builders, Inc, posts 24/7 hours; ranked #2 of 21.
- 6
Most-reviewed: Crandall Roofing, Inc., 117 Google reviews at 4.9★, the most of 21 ranked after Roof Doctors Sonoma County; ranked #6.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
21 Windsor foundation repair companies are ranked here by CR Score, from ten published factors. 2 are open 24/7, 10 open Saturdays and 5 open Sundays, based on posted hours. The median Google rating is 4.9★ across 21 rated businesses.
Top 10 foundation repair companies in Windsor at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Roof Doctors Sonoma County | 62 | 4.9★ (208) | Windsor | 24/7 | Overall |
| 2 | Sustainable Living Builders, Inc | 58 | 4.9★ (84) | Sebastopol, 13 mi away | 24/7 | Emergencies |
| 3 | Under The House. | 57 | 5.0★ (62) | Santa Rosa, 8 mi away | Sat · Sun · Evenings | — |
| 4 | Modern Summit Roofing Contractor | 55 | 5.0★ (47) | Petaluma, 15 mi away | Sat · Sun · Evenings | — |
| 5 | Xalos Foundation Support | 55 | 5.0★ (27) | Windsor | — | — |
| 6 | Crandall Roofing, Inc. | 53 | 4.9★ (117) | Santa Rosa, 12 mi away | — | Most reviews |
| 7 | Rich’s Mobile Home Service | 53 | 4.5★ (27) | Santa Rosa, 11 mi away | Sat · Sun · Evenings | — |
| 8 | Aleman Concrete | 52 | 5.0★ (27) | Santa Rosa, 10 mi away | Sat · Evenings | — |
| 9 | Clean CrawlSpace Inc. | 52 | 5.0★ (57) | Santa Rosa, 11 mi away | — | — |
| 10 | Concrete Contractor Rohnert Park | 51 | 5.0★ (19) | Cotati, 16 mi away | Sat · Evenings | — |
The 21 best foundation repair companies in Windsor, 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 Sebastopol, 13 mi away
58/100CR ScoreRanked #2 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 Santa Rosa, 8 mi away
57/100CR ScoreRanked #3 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 Petaluma, 15 mi away
55/100CR ScoreRanked #4 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 Windsor
55/100CR ScoreRanked #5 because of its Google rating and trade focus: 5.0★ from 27 Google reviews, listed on Google as “Concrete contractor”.
- 5.0★ from 27 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat–Sun closed
- Address
- 9472 Wellington Cir, Windsor, CA 95492
Based in Santa Rosa, 12 mi away
53/100CR ScoreRanked #6 because of its Google rating and review volume: 4.9★ from 117 Google reviews.
- 4.9★ from 117 Google reviews
- Hours
- Mon–Fri 8 AM–4 PM · Sat–Sun closed
- Address
- 183 Oceanic Way, Santa Rosa, CA 95407
Based in Santa Rosa, 11 mi away
53/100CR ScoreRanked #7 because of its Google rating and review volume: 4.5★ from 27 Google reviews.
- 4.5★ from 27 Google reviews
- Hours
- Mon–Sun 9 AM–7 PM
- Address
- 111 Knolls Ln, Santa Rosa, CA 95404
Based in Santa Rosa, 10 mi away
52/100CR ScoreRanked #8 because of its Google rating and review volume: 5.0★ from 27 Google reviews.
- 5.0★ from 27 Google reviews
- Hours
- Mon–Sat 6 AM–6:30 PM · Sun closed
- Address
- 5023 Algiers Ave, Santa Rosa, CA 95409
Based in Santa Rosa, 11 mi away
52/100CR ScoreRanked #9 because of its Google rating and review volume: 5.0★ from 57 Google reviews.
- 5.0★ from 57 Google reviews
- Hours
- Mon–Fri 8 AM–4:30 PM · Sat–Sun closed
- Address
- 3100 Dutton Ave Ste. 142E, Santa Rosa, CA 95407
Based in Cotati, 16 mi away
51/100CR ScoreRanked #10 because of its Google rating and review volume: 5.0★ from 19 Google reviews.
- 5.0★ from 19 Google reviews
- Hours
- Mon–Fri 8 AM–7 PM · Sat 8 AM–5 PM · Sun closed
Based in Santa Rosa, 9 mi away
50/100CR ScoreRanked #11 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “Concrete contractor”.
- 5.0★ from 8 Google reviews
- Hours
- Mon–Sat 6 AM–5 PM · Sun closed
- Address
- 172 Leisure Park Cir, Santa Rosa, CA 95401
#12 Division Seven
Based in Petaluma, 23 mi away
49/100CR ScoreRanked #12 because of its Google rating and trade focus: 3.0★ from 4 Google reviews, listed on Google as “Waterproofing service”.
- 3.0★ from 4 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat–Sun closed
- Address
- 22 Lakeville St, Petaluma, CA 94952
Based in Novato, 36 mi away
48/100CR ScoreRanked #13 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 Petaluma, 17 mi away
48/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.6★ from 7 Google reviews, listed on Google as “Roofing contractor”.
- 4.6★ from 7 Google reviews
- Hours
- Mon–Sat 7 AM–6 PM · Sun closed
Based in Santa Rosa, 8 mi away
48/100CR ScoreRanked #15 because of its Google rating and trade focus: 4.0★ from 4 Google reviews, listed on Google as “General contractor”.
- 4.0★ from 4 Google reviews
- Hours
- Mon–Fri 8 AM–6 PM · Sat 10 AM–2 PM · Sun closed
- Address
- 717 Blair Pl, Santa Rosa, CA 95401
Based in Benicia, 35 mi away
47/100CR ScoreRanked #16 because of its Google rating and trade focus: 4.1★ from 31 Google reviews, listed on Google as “Concrete contractor”.
- 4.1★ from 31 Google reviews
- Hours
- Mon–Thu 8 AM–5 PM · Fri 8 AM–4:30 PM · Sat–Sun closed
Based in Santa Rosa, 11 mi away
47/100CR ScoreRanked #17 because of its Google rating and trade focus: 4.1★ from 9 Google reviews, listed on Google as “Roofing contractor”.
- 4.1★ from 9 Google reviews
- Hours
- Mon–Fri 9 AM–5 PM · Sat–Sun closed
- Address
- 2989 Wiljan Ct Suite B, Santa Rosa, CA 95407
Based in Larkfield-Wikiup, 11 mi away
46/100CR ScoreRanked #18 because of its Google rating and trade focus: 3.6★ from 5 Google reviews, listed on Google as “Landscaper”.
- 3.6★ from 5 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat–Sun closed
#19 The Roofer
Based in Rohnert Park, 15 mi away
46/100CR ScoreRanked #19 because of its Google rating and trade focus: 4.2★ from 5 Google reviews, listed on Google as “Roofing contractor”.
- 4.2★ from 5 Google reviews
- Hours
- Mon–Fri 7 AM–6 PM · Sat–Sun closed
Based in San Rafael, 40 mi away
46/100CR ScoreRanked #20 because of its Google rating and review volume: 4.8★ from 30 Google reviews.
- 4.8★ from 30 Google reviews
- Hours
- Mon–Fri 8 AM–4:30 PM · Sat–Sun closed
- Address
- 69 Paul Dr., San Rafael, CA 94903
#21 Mason Plumbing
Based in Corte Madera, 33 mi away
44/100CR ScoreRanked #21 because of its Google rating and trade focus: 4.9★ from 10 Google reviews, listed on Google as “Plumber”.
- 4.9★ from 10 Google reviews
- Hours
- Mon–Fri 7 AM–5 PM · Sat–Sun closed
Also serving Windsor
16 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 | 35 mi | |
| Acecal Waterproofing & Decking | 1.0★ (1) | 33 mi |
| Adams Roofing | 11 mi | |
| Certified Specialists, Inc. | 5.0★ (2) | 11 mi |
| Dan Fix Landscape Construction Co. | 40 mi | |
| DW Excavation, LLC | 5.0★ (1) | In Windsor |
| Elite Concrete | 4.1★ (9) | In Windsor |
| Everest Roofing | 24 mi | |
| Flores's General Construction Inc | 5.0★ (8) | In Windsor |
| Foundation Repair of CA | 5.0★ (1) | 18 mi |
| Gehrett & Zunino Builders, Inc. | Windsor Construction & Remodeling | 5.0★ (3) | In Windsor |
| North Bay Concrete Inc | 4.8★ (6) | In Windsor |
| North Coast Waterproofing Inc | 25 mi | |
| RTS Construction | 3.7★ (3) | In Windsor |
| Thoroughbred WaterProofing | 5.0★ (1) | 11 mi |
| Windsor North Bay Builders | 5.0★ (10) | In Windsor |
How much do foundation repair companies cost in Windsor?
National price ranges in USD, not adjusted for Windsor. 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 Windsor foundation repair companies
We scored 21 Windsor 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 Windsor 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 Windsor: frequently asked questions
Who is the best foundation repair company in Windsor?
By CR Score, the highest-ranked foundation repair company in Windsor, CA is Roof Doctors Sonoma County with a CR Score of 62/100. It has 4.9★ from 208 Google reviews. It is open 24/7. Sustainable Living Builders, Inc (#2) and Under The House. (#3) follow. We ranked 21 foundation repair companies on ten factors, last updated October 22, 2026.
How many foundation repair companies are there in Windsor?
ContractorsRanked ranks 21 foundation repair companies serving Windsor, CA. 2 of them are based in Windsor; the rest serve it from nearby towns. Another 16 within 40 mi are listed but not ranked yet. Counts are as of October 2026.
Which foundation repair companies in Windsor are open 24/7?
2 ranked foundation repair companies in Windsor post 24/7 hours. The highest-ranked are Roof Doctors Sonoma County (#1) and Sustainable Living Builders, Inc (#2). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which foundation repair companies in Windsor work on weekends?
10 of 21 ranked foundation repair companies post Saturday hours and 5 post Sunday hours. The highest-ranked open Saturdays are Roof Doctors Sonoma County (#1), Sustainable Living Builders, Inc (#2) and Under The House. (#3). Posted hours are office hours; crews may book weekend jobs separately.
How much does foundation repair cost in Windsor?
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 Windsor. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Windsor foundation repair companies have?
The median Google rating among 21 rated foundation repair companies in Windsor is 4.9★, with a median of 27 reviews. Roof Doctors Sonoma County has the most, 208 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 Windsor count in this ranking?
Yes, if they are within 40 mi of the Windsor 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 Windsor
- October 2026: CR Scores recalculated for 21 foundation repair companies serving Windsor.
More foundation repair companies and Windsor pages
Foundation repair companies near Windsor
- Foundation repair companies in Larkfield-Wikiup, CA25 ranked
- Foundation repair companies in Healdsburg, CA19 ranked
- Foundation repair companies in Santa Rosa, CA30 ranked
- Foundation repair companies in Roseland, CA33 ranked
- Foundation repair companies in Sebastopol, CA27 ranked
- Foundation repair companies in Calistoga, CA25 ranked
- Foundation repair companies in Rohnert Park, CA43 ranked
- Foundation repair companies in Cotati, CA44 ranked
- Foundation repair companies in Saint Helena, CA38 ranked
- Foundation repair companies in Cloverdale, CA16 ranked
Other trades in Windsor
- Roofers in Windsor104 ranked
- Plumbers in Windsor163 ranked
- Electricians in Windsor96 ranked
- HVAC contractors in Windsor96 ranked
- General contractors in Windsor148 ranked
- Painters in Windsor75 ranked
- Landscapers in Windsor69 ranked
- Handymen in Windsor33 ranked
- Kitchen remodelers in Windsor77 ranked
- Bathroom remodelers in Windsor66 ranked
- Flooring contractors in Windsor50 ranked
- Tile installers in Windsor19 ranked
- Drywall contractors in Windsor13 ranked
- Concrete contractors in Windsor63 ranked
- Fence contractors in Windsor45 ranked
- Deck builders in Windsor34 ranked
- Siding contractors in Windsor19 ranked
- Window installers in Windsor51 ranked
- Gutter installers in Windsor50 ranked
- Insulation contractors in Windsor15 ranked
- Solar installers in Windsor70 ranked
- Garage door repair companies in Windsor22 ranked
- Tree services in Windsor86 ranked
- Masonry contractors in Windsor41 ranked
- Water damage restoration companies in Windsor56 ranked
- Home builders in Windsor82 ranked
- Demolition contractors in Windsor15 ranked
- All contractors in Windsor