45 foundation repair companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Port Washington: GSI Foundations, CR Score 58/100; 4.9★ from 88 Google reviews.
Best for emergencies (open 24/7): Basement Repair Specialists Milwaukee, posts 24/7 hours; ranked #5 of 45.
Most-reviewed: Knight Plumbing, Inc., 1,063 Google reviews at 4.8★, the most of 45 ranked; ranked #11.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
45 Port Washington foundation repair companies are ranked here by CR Score, from ten published factors. 7 are open 24/7, 24 open Saturdays and 10 open Sundays, based on posted hours. The median Google rating is 4.9★ across 45 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | GSI Foundations | 58 | 4.9★ (88) | Germantown, 16 mi away | — | Overall |
| 2 | Accurate Basement Repair | 58 | 4.9★ (834) | Milwaukee, 29 mi away | — | — |
| 3 | Zablocki Waterproofing | Milwaukee | 56 | 4.9★ (62) | Oak Creek, 32 mi away | Sat · Sun · Evenings | — |
| 4 | Renew Basement Foundation | 55 | 5.0★ (84) | West Allis, 27 mi away | — | — |
| 5 | Basement Repair Specialists Milwaukee | 55 | 5.0★ (6) | Brookfield, 27 mi away | 24/7 | Emergencies |
| 6 | North Shore Masonry | 54 | 5.0★ (108) | Milwaukee, 25 mi away | 24/7 | — |
| 7 | Basement Shields | 54 | 5.0★ (44) | Brookfield, 22 mi away | — | — |
| 8 | McCoy Contractors | 54 | 4.8★ (66) | Brookfield, 23 mi away | — | — |
| 9 | Queen Foundation Repair | 54 | 5.0★ (32) | South Milwaukee, 32 mi away | Sat | — |
| 10 | The Mudjackers LLC | 54 | 4.9★ (123) | Waukesha, 35 mi away | — | — |
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 trade focus: 4.9★ from 88 Google reviews, listed on Google as “Waterproofing service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Milwaukee, 29 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 834 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Oak Creek, 32 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 8 of 10 factors; credentials and recency not yet collected.
Based in West Allis, 27 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 84 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Brookfield, 27 mi away
Ranked #5 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Milwaukee, 25 mi away
Ranked #6 because of its Google rating and review volume: 5.0★ from 108 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Brookfield, 22 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 44 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Brookfield, 23 mi away
Ranked #8 because of its Google rating and trade focus: 4.8★ from 66 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in South Milwaukee, 32 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 32 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Waukesha, 35 mi away
Ranked #10 because of its Google rating and trade focus: 4.9★ from 123 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Milwaukee, 29 mi away
Ranked #11 because of its Google rating and review volume: 4.8★ from 1,063 Google reviews, the most in Port Washington.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Franklin, 22 mi away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 58 Google reviews, listed on Google as “Concrete contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Waukesha, 32 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 98 Google reviews, listed on Google as “Repair service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sheboygan, 26 mi away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Brookfield, 26 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 26 Google reviews, listed on Google as “Concrete contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Franklin, 34 mi away
Ranked #16 because of its Google rating and trade focus: 4.7★ from 52 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Pewaukee, 28 mi away
Ranked #17 because of its Google rating and review volume: 4.3★ from 174 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Brown Deer, 18 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 20 Google reviews, listed on Google as “Concrete contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Brookfield, 26 mi away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Waterproofing service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in New Berlin, 30 mi away
Ranked #20 because of its Google rating and trade focus: 4.7★ from 76 Google reviews, listed on Google as “Concrete contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hartford, 26 mi away
Ranked #21 because of its Google rating and review volume: 4.8★ from 176 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hartland, 28 mi away
Ranked #22 because of its Google rating and availability: 5.0★ from 20 Google reviews, open 24/7.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fond du Lac, 14 mi away
Ranked #23 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Concrete contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Brookfield, 29 mi away
Ranked #24 because of its Google rating and trade focus: 4.8★ from 88 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Milwaukee, 21 mi away
Ranked #25 because of its Google rating and review volume: 5.0★ from 48 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
National price ranges in USD, not adjusted for Port Washington. 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 45 Port Washington 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 Port Washington 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 |