143 foundation repair companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Washington: United Waterproofing, CR Score 61/100; 5.0★ from 156 Google reviews; open 24/7.
Best for emergencies (open 24/7): Pure Service Pro, posts 24/7 hours; ranked #2 of 143.
Most-reviewed: Groundworks, 1,286 Google reviews at 4.8★, the most of 143 ranked; ranked #5.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
143 Washington foundation repair companies are ranked here by CR Score, from ten published factors. 41 are open 24/7, 103 open Saturdays and 66 open Sundays, based on posted hours. The median Google rating is 4.9★ across 143 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | United Waterproofing | 61 | 5.0★ (156) | Dover, 25 mi away | 24/7 | Overall |
| 2 | Pure Service Pro | 61 | 4.9★ (250) | East Hanover, 30 mi away | 24/7 | Emergencies |
| 3 | Groundworks | 60 | 4.9★ (586) | South Plainfield, 32 mi away | Sat · Sun · Evenings | — |
| 4 | Pro Dry Waterproofing LLC | 60 | 4.9★ (129) | Rockaway, 27 mi away | 24/7 | — |
| 5 | Groundworks | 60 | 4.8★ (1,286) | Montgomeryville, 40 mi away | Sat · Sun · Evenings | Most reviews |
| 6 | Blue Umbrella Waterproofing | 60 | 5.0★ (412) | Cranford, 36 mi away | Sat · Sun · Evenings | — |
| 7 | H2GO Waterproofing | 59 | 5.0★ (36) | Bernardsville, 17 mi away | 24/7 | — |
| 8 | ARD Waterproofing | 59 | 5.0★ (146) | Caldwell, 38 mi away | 24/7 | — |
| 9 | Groundworks | 58 | 5.0★ (117) | Allentown, 29 mi away | Sat · Sun · Evenings | — |
| 10 | Assured Waterproofing | 57 | 5.0★ (17) | Bridgewater, 23 mi away | 24/7 | — |
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: 5.0★ from 156 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in East Hanover, 30 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 250 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in South Plainfield, 32 mi away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 586 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Rockaway, 27 mi away
Ranked #4 because of its Google rating and trade focus: 4.9★ from 129 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Montgomeryville, 40 mi away
Ranked #5 because of its Google rating and review volume: 4.8★ from 1,286 Google reviews, the most in Washington.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Cranford, 36 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 412 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bernardsville, 17 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 36 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Caldwell, 38 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 146 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Allentown, 29 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 117 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bridgewater, 23 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 17 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Berkeley Heights, 36 mi away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 320 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Allentown, 21 mi away
Ranked #12 because of its Google rating and review volume: 5.0★ from 182 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Allentown, 29 mi away
Ranked #13 because of its Google rating and trade focus: 4.9★ from 27 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Palmerton, 29 mi away
Ranked #14 because of its Google rating and trade focus: 4.9★ from 46 Google reviews, listed on Google as “Waterproofing service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Bridgewater, 20 mi away
Ranked #15 because of its Google rating and review volume: 5.0★ from 93 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bedminster, 32 mi away
Ranked #16 because of its Google rating and trade focus: 4.9★ from 54 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Clark, 37 mi away
Ranked #17 because of its Google rating and trade focus: 4.9★ from 84 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Stroudsburg, 20 mi away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 45 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Scotch Plains, 32 mi away
Ranked #19 because of its Google rating and trade focus: 4.8★ from 61 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bridgewater, 23 mi away
Ranked #20 because of its Google rating and trade focus: 3.0★ from 4 Google reviews, listed on Google as “Foundation”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Scotch Plains, 35 mi away
Ranked #21 because of its Google rating and trade focus: 4.8★ from 8 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Avenel, 39 mi away
Ranked #22 because of its Google rating and trade focus: 4.9★ from 28 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bedminster, 37 mi away
Ranked #23 because of its Google rating and trade focus: 4.7★ from 32 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in East Brunswick, 35 mi away
Ranked #24 because of its Google rating and review volume: 5.0★ from 185 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Allentown, 31 mi away
Ranked #25 because of its Google rating and review volume: 5.0★ from 139 Google reviews.
Based on 8 of 10 factors; credentials and recency 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 143 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 |
|---|---|---|
| Advance Tech Waterproofing | 5.0★ (2) | 25 mi |
| Alert Roofing Construction | 5.0★ (2) | 39 mi |
| ALLIANCE A1 ENTERPRISES | 5.0★ (1) | 35 mi |
| Als Roofing Services | 5.0★ (1) | 23 mi |
| Camden Group Inc | 3.0★ (2) | 38 mi |
| Copps Foundations Inc | 5.0★ (1) | 28 mi |
| Fireline Foundations | 3.0★ (2) | 36 mi |
| G & L Custom Home Improvements | 5.0★ (2) | 18 mi |
| Go Pro Basements | 3.0★ (2) | 38 mi |
| Interstate Contracting And Restoration | 5.0★ (2) | 31 mi |
| J&J Waterproofing System | 5.0★ (1) | 24 mi |
| LaFerla Brothers Masonry & Hardscaping | 5.0★ (2) | In Washington |
| Millstone Builders | 4.6★ (11) | In Washington |
| Nu-Look Home Improvement | 3.0★ (2) | 33 mi |
| Perfect Dry Basement | 5.0★ (2) | 36 mi |
| RCS Construction Services LLC | 3.0★ (2) | 20 mi |
| SmartSeal Injections | 5.0★ (1) | 21 mi |
| Solid Foundation Home Inspection | In Washington | |
| Valente & Son Home Improvement | 5.0★ (3) | In Washington |
| Waterproofing One | 1.0★ (1) | 19 mi |
National price ranges in USD, not adjusted for 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 143 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 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 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 |