53 foundation repair companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Slinger: GSI Foundations, CR Score 86/100; 4.9★ from 88 Google reviews.
Best for emergencies (open 24/7): Basement Repair Specialists Milwaukee, posts 24/7 hours; ranked #2 of 53.
Most-reviewed: Knight Plumbing, Inc., 1,063 Google reviews at 4.8★, the most of 53 ranked; ranked #17.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
53 Slinger foundation repair companies are ranked here by CR Score, from 8 published factors. 8 are open 24/7, 29 open Saturdays and 11 open Sundays, based on posted hours. The median Google rating is 4.9★ across 53 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | GSI Foundations | 86 | 4.9★ (88) | Germantown, 13 mi away | — | Overall |
| 2 | Basement Repair Specialists Milwaukee | 82 | 5.0★ (6) | Brookfield, 23 mi away | 24/7 | Emergencies |
| 3 | Zablocki Waterproofing | Milwaukee | 82 | 4.9★ (62) | Oak Creek, 34 mi away | Sat · Sun · Evenings | — |
| 4 | Rion Waterproofing and Foundation Repair | 81 | 4.9★ (167) | Brookfield, 25 mi away | Sat | — |
| 5 | North Shore Masonry | 81 | 5.0★ (108) | Milwaukee, 28 mi away | 24/7 | — |
| 6 | Accurate Basement Repair | 80 | 4.9★ (834) | Milwaukee, 33 mi away | — | — |
| 7 | Ladders Up Exteriors | 80 | 5.0★ (20) | Hartland, 12 mi away | 24/7 | — |
| 8 | A+ Environmental, Inc. | 79 | 4.9★ (34) | Fort Atkinson, 39 mi away | Sat · Sun | — |
| 9 | Ihn Company | 79 | 4.3★ (174) | Pewaukee, 17 mi away | 24/7 | — |
| 10 | Basement Foundation Repair | 78 | 5.0★ (98) | Waukesha, 21 mi away | Sat · Evenings | — |
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and trade focus: 4.9★ from 88 Google reviews, listed on Google as “Waterproofing service”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Brookfield, 23 mi away
Ranked #2 because of its Google rating and availability: 5.0★ from 6 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Oak Creek, 34 mi away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 62 Google reviews, listed on Google as “Waterproofing service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Brookfield, 25 mi away
Ranked #4 because of its Google rating and trade focus: 4.9★ from 167 Google reviews, listed on Google as “Waterproofing service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Milwaukee, 28 mi away
Ranked #5 because of its Google rating and availability: 5.0★ from 108 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Milwaukee, 33 mi away
Ranked #6 because of its Google rating and trade focus: 4.9★ from 834 Google reviews, listed on Google as “Waterproofing service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Hartland, 12 mi away
Ranked #7 because of its Google rating and availability: 5.0★ from 20 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Fort Atkinson, 39 mi away
Ranked #8 because of its Google rating and trade focus: 4.9★ from 34 Google reviews, listed on Google as “Waterproofing service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Pewaukee, 17 mi away
Ranked #9 because of its Google rating and availability: 4.3★ from 174 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Waukesha, 21 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 98 Google reviews, listed on Google as “Repair service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Waukesha, 24 mi away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 123 Google reviews, listed on Google as “Waterproofing service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Hartford, 6 mi away
Ranked #12 because of its Google rating and review volume: 4.8★ from 176 Google reviews, 176 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in South Milwaukee, 35 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 32 Google reviews, listed on Google as “Waterproofing service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Franklin, 19 mi away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 58 Google reviews, listed on Google as “Concrete contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Brookfield, 22 mi away
Ranked #15 because of its Google rating and availability: 5.0★ from 16 Google reviews, open 7 days a week.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in West Allis, 28 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 84 Google reviews, listed on Google as “Waterproofing service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Milwaukee, 32 mi away
Ranked #17 because of its Google rating and review volume: 4.8★ from 1,063 Google reviews, the most Google reviews on this list (1,063).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Brookfield, 20 mi away
Ranked #18 because of its Google rating and trade focus: 4.8★ from 66 Google reviews, listed on Google as “Waterproofing service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in New Berlin, 24 mi away
Ranked #19 because of its Google rating and trade focus: 4.7★ from 76 Google reviews, listed on Google as “Concrete contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Brookfield, 33 mi away
Ranked #20 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Waterproofing service”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Brown Deer, 14 mi away
Ranked #21 because of its Google rating and trade focus: 4.9★ from 20 Google reviews, listed on Google as “Concrete contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Brookfield, 31 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 44 Google reviews, listed on Google as “Waterproofing service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Menasha, 29 mi away
Ranked #23 because of its Google rating and availability: 2.6★ from 5 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Caledonia, 38 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “Waterproofing service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Delafield, 17 mi away
Ranked #25 because of its Google rating and trade focus: 3.8★ from 26 Google reviews, listed on Google as “Excavating contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
#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 53 ranked foundation repair companies here; the rest are on their profiles.
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 |
|---|---|---|
| Adonnis Waterproofing | 37 mi | |
| Alpha Insulation & Waterproofing | 23 mi | |
| Alpine Insulation | 17 mi | |
| Alpine Insulation | 39 mi | |
| Basement Foundation Repair | 5.0★ (1) | 31 mi |
| Best Basement Waterproofing Milwaukee | 5.0★ (1) | 16 mi |
| Custom Concrete Coatings | 22 mi | |
| Eagle's Exteriors, LLC | 30 mi | |
| Everdry Waterproofing of Wisconsin | 21 mi | |
| JCR Restoration LLC | 5.0★ (2) | 33 mi |
| Kotze Construction | 5.0★ (2) | 27 mi |
| Premier Restoration, LLC | 3.0★ (2) | 36 mi |
| Ripon Basement Waterproofing | 5.0★ (1) | 36 mi |
| Ripon Foundation Repair | 5.0★ (1) | 31 mi |
| Sid’s Sealants LLC | 21 mi | |
| Sidewalk Raisers | 25 mi | |
| Watertight Masonry LLC | 26 mi | |
| West Bend Foundation Repair | 5.0★ (1) | 4 mi |
| Wisconsin Foundation Specialist | 5.0★ (2) | 22 mi |
| Wiseman Roofing and Services | 34 mi |
National price ranges in USD, not adjusted for Slinger. 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 53 Slinger 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 Slinger 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 |