173 foundation repair companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Claymont: A Waterproofing Solution Inc, CR Score 89/100; 4.9★ from 189 Google reviews; open 24/7.
Best for emergencies (open 24/7): A J Waterproofing, posts 24/7 hours; ranked #2 of 173.
Most-reviewed: Jamison Basement Waterproofing, 1,583 Google reviews at 5.0★, the most of 173 ranked; ranked #9.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
173 Claymont foundation repair companies are ranked here by CR Score, from 8 published factors. 38 are open 24/7, 116 open Saturdays and 70 open Sundays, based on posted hours. The median Google rating is 4.9★ across 173 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | A Waterproofing Solution Inc | 89 | 4.9★ (189) | King of Prussia, 20 mi away | 24/7 | Overall |
| 2 | A J Waterproofing | 87 | 4.9★ (150) | Collegeville, 29 mi away | 24/7 | Emergencies |
| 3 | Basement Scientists | 87 | 5.0★ (46) | Radnor, 18 mi away | 24/7 | — |
| 4 | Finally Dry Waterproofing | 87 | 5.0★ (50) | Lindenwold, 21 mi away | 24/7 | — |
| 5 | Groundworks | 87 | 4.8★ (1,286) | Montgomeryville, 31 mi away | Sat · Sun · Evenings | — |
| 6 | Completely Dry Waterproofing | 87 | 4.9★ (10) | Claymont | 24/7 | — |
| 7 | Four Leaf Restoration Waterproofing and Mold Remediation | 86 | 5.0★ (51) | Williamstown, 24 mi away | 24/7 | — |
| 8 | Hard Knox Waterproofing | 86 | 5.0★ (51) | Chester, 4 mi away | Sat · Sun · Evenings | — |
| 9 | Jamison Basement Waterproofing | 86 | 5.0★ (1,583) | Oreland, 26 mi away | Sat | Most reviews |
| 10 | 58 Foundations & Waterproofing | 85 | 4.8★ (196) | Newark, 18 mi away | Sat · Sun · Evenings | — |
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Scores below: based on 6 of 8 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Ranked #1 because of its Google rating and availability: 4.9★ from 189 Google reviews, open 24/7.
Based in Collegeville, 29 mi away
Ranked #2 because of its Google rating and availability: 4.9★ from 150 Google reviews, open 24/7.
Based in Radnor, 18 mi away
Ranked #3 because of its Google rating and availability: 5.0★ from 46 Google reviews, open 24/7.
Based in Lindenwold, 21 mi away
Ranked #4 because of its Google rating and availability: 5.0★ from 50 Google reviews, open 24/7.
Based in Montgomeryville, 31 mi away
Ranked #5 because of its Google rating and trade focus: 4.8★ from 1,286 Google reviews, listed on Google as “Waterproofing service”.
Based in Claymont
Ranked #6 because of its Google rating and availability: 4.9★ from 10 Google reviews, open 24/7.
Based in Williamstown, 24 mi away
Ranked #7 because of its Google rating and availability: 5.0★ from 51 Google reviews, open 24/7.
Based in Chester, 4 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 51 Google reviews, listed on Google as “Waterproofing service”.
Based in Oreland, 26 mi away
Ranked #9 because of its Google rating and review volume: 5.0★ from 1,583 Google reviews, the most Google reviews on this list (1,583).
Based in Newark, 18 mi away
Ranked #10 because of its Google rating and trade focus: 4.8★ from 196 Google reviews, listed on Google as “Waterproofing service”.
Based in Wilmington, 7 mi away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 283 Google reviews, listed on Google as “Waterproofing service”.
Based in Hammonton, 36 mi away
Ranked #12 because of its Google rating and availability: 5.0★ from 72 Google reviews, open 24/7.
Based in Williamstown, 21 mi away
Ranked #13 because of its Google rating and availability: 4.7★ from 35 Google reviews, open 24/7.
Based in Philadelphia, 20 mi away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 61 Google reviews, listed on Google as “Waterproofing service”.
Based in Audubon, 22 mi away
Ranked #15 because of its Google rating and availability: 4.7★ from 14 Google reviews, open 24/7.
Based in Chester Springs, 18 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 34 Google reviews, listed on Google as “Waterproofing service”.
Based in Carneys Point, 14 mi away
Ranked #17 because of its Google rating and availability: 4.9★ from 142 Google reviews, open 24/7.
Based in Atco, 29 mi away
Ranked #18 because of its Google rating and availability: 5.0★ from 15 Google reviews, open 24/7.
Based in Bellmawr, 18 mi away
Ranked #19 because of its Google rating and availability: 4.4★ from 7 Google reviews, open 24/7.
Based in Willow Grove, 30 mi away
Ranked #20 because of its Google rating and availability: 4.7★ from 19 Google reviews, open 24/7.
Based in Chester Springs, 19 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 116 Google reviews, listed on Google as “Waterproofing service”.
Based in Chester Springs, 19 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 26 Google reviews, listed on Google as “Waterproofing service”.
Based in Norristown, 23 mi away
Ranked #23 because of its Google rating and trade focus: 4.9★ from 38 Google reviews, listed on Google as “Waterproofing service”.
Based in Collegeville, 26 mi away
Ranked #24 because of its Google rating and trade focus: 4.4★ from 382 Google reviews, listed on Google as “Waterproofing service”.
Based in Philadelphia, 28 mi away
Ranked #25 because of its Google rating and trade focus: 4.8★ from 371 Google reviews, listed on Google as “Waterproofing service”.
National price ranges in USD, not adjusted for Claymont. 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 173 Claymont 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 Claymont 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 |