24 foundation repair companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Sun Prairie: Badger Basement Systems, CR Score 62/100; 4.6★ from 306 Google reviews; open Saturdays until 2 PM.
Best for emergencies (open 24/7): Basement Repair Specialists LLC, posts 24/7 hours; ranked #5 of 24.
Most-reviewed: Zander Solutions, 133 Google reviews at 4.6★, the most of 24 ranked after Badger Basement Systems; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
24 Sun Prairie foundation repair companies are ranked here by CR Score, from ten published factors. 4 are open 24/7, 9 open Saturdays and 5 open Sundays, based on posted hours. The median Google rating is 4.7★ across 24 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Badger Basement Systems | 62 | 4.6★ (306) | Fort Atkinson, 6 mi away | Sat | Overall |
| 2 | A+ Environmental, Inc. | 57 | 4.9★ (34) | Fort Atkinson, 26 mi away | Sat · Sun | — |
| 3 | Zander Solutions | 56 | 4.6★ (133) | Verona, 22 mi away | — | Most reviews |
| 4 | Everdry Waterproofing of Wisconsin | 55 | 4.6★ (10) | Madison, 10 mi away | Sat · Evenings | — |
| 5 | Basement Repair Specialists LLC | 53 | 4.4★ (19) | Madison, 6 mi away | 24/7 | Emergencies |
| 6 | Koala Insulation of Madison | 53 | 5.0★ (61) | Sun Prairie | — | — |
| 7 | Basement Waterproofing of Madison | 52 | 5.0★ (8) | Madison, 13 mi away | — | — |
| 8 | Rote's Landscaping And Waterproofing | 52 | 4.9★ (71) | Janesville, 35 mi away | 24/7 | — |
| 9 | Wisconsin Waterproofing, LLC. | 51 | 5.0★ (5) | Fitchburg, 12 mi away | — | — |
| 10 | Waupun Foundation Repair | 51 | 5.0★ (16) | Brookfield, 31 mi away | Sat · Sun · Evenings | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and review volume: 4.6★ from 306 Google reviews, the most in Sun Prairie.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fort Atkinson, 26 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 34 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Verona, 22 mi away
Ranked #3 because of its Google rating and trade focus: 4.6★ from 133 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Madison, 10 mi away
Ranked #4 because of its Google rating and trade focus: 4.6★ from 10 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Madison, 6 mi away
Ranked #5 because of its Google rating and review volume: 4.4★ from 19 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sun Prairie
Ranked #6 because of its Google rating and review volume: 5.0★ from 61 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Madison, 13 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Janesville, 35 mi away
Ranked #8 because of its Google rating and review volume: 4.9★ from 71 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fitchburg, 12 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Brookfield, 31 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 16 Google reviews, listed on Google as “Concrete contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Janesville, 35 mi away
Ranked #11 because of its Google rating and review volume: 4.6★ from 33 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fitchburg, 13 mi away
Ranked #12 because of its Google rating and trade focus: 4.5★ from 8 Google reviews, listed on Google as “Concrete contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in South Beloit, 40 mi away
Ranked #13 because of its Google rating and review volume: 5.0★ from 128 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Jefferson, 27 mi away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 10 Google reviews, listed on Google as “Roofing contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Madison, 10 mi away
Ranked #15 because of its Google rating and review volume: 4.2★ from 24 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Stoughton, 19 mi away
Ranked #16 because of its Google rating and trade focus: 3.7★ from 3 Google reviews, listed on Google as “General contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Jefferson, 22 mi away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Masonry contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Madison, 13 mi away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Concrete contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fort Atkinson, 31 mi away
Ranked #19 because of its Google rating and review volume: 4.8★ from 19 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Madison, 10 mi away
Ranked #20 because of its Google rating and trade focus: 2.9★ from 8 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Verona, 20 mi away
Ranked #21 because of its Google rating and trade focus: 2.8★ from 9 Google reviews, listed on Google as “Concrete contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Fitchburg, 23 mi away
Ranked #22 because of its Google rating and trade focus: 4.3★ from 11 Google reviews, listed on Google as “Lawn care service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Janesville, 37 mi away
Ranked #23 because of its Google rating and review volume: 4.4★ from 30 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fitchburg, 32 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 10 Google reviews, listed on Google as “Roofing contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
National price ranges in USD, not adjusted for Sun Prairie. 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 24 Sun Prairie 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 Sun Prairie 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 |