84 foundation repair companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Fullerton: Groundworks, CR Score 62/100; 5.0★ from 117 Google reviews; open 7 days a week.
Best for emergencies (open 24/7): A J Waterproofing, posts 24/7 hours; ranked #3 of 84.
Most-reviewed: Jamison Basement Waterproofing, 1,583 Google reviews at 5.0★, the most of 84 ranked; ranked #4.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
84 Fullerton foundation repair companies are ranked here by CR Score, from ten published factors. 18 are open 24/7, 56 open Saturdays and 38 open Sundays, based on posted hours. The median Google rating is 4.8★ across 84 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Groundworks | 62 | 5.0★ (117) | Allentown, 2 mi away | Sat · Sun · Evenings | Overall |
| 2 | Groundworks | 61 | 4.8★ (1,286) | Montgomeryville, 32 mi away | Sat · Sun · Evenings | — |
| 3 | A J Waterproofing | 59 | 4.9★ (150) | Collegeville, 29 mi away | 24/7 | Emergencies |
| 4 | Jamison Basement Waterproofing | 59 | 5.0★ (1,583) | Oreland, 39 mi away | Sat | Most reviews |
| 5 | APW Basement Waterproofing | 59 | 4.9★ (27) | Allentown, 3 mi away | Sat · Sun · Evenings | — |
| 6 | A Waterproofing Solution Inc | 59 | 4.9★ (189) | King of Prussia, 37 mi away | 24/7 | — |
| 7 | A+ Waterproofing | 58 | 4.9★ (46) | Palmerton, 9 mi away | — | — |
| 8 | Eric’s Custom Decks & Pergola Design Build /Remodeling By VM Power | 58 | 5.0★ (182) | Allentown, 6 mi away | 24/7 | — |
| 9 | ROOFX Roofing | 57 | 5.0★ (139) | Allentown, 5 mi away | 24/7 | — |
| 10 | Basement Waterproofing Specialists, Inc. | 57 | 4.4★ (382) | Collegeville, 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 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 Montgomeryville, 32 mi away
Ranked #2 because of its Google rating and trade focus: 4.8★ from 1,286 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Collegeville, 29 mi away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 150 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Oreland, 39 mi away
Ranked #4 because of its Google rating and review volume: 5.0★ from 1,583 Google reviews, the most in Fullerton.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Allentown, 3 mi away
Ranked #5 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 King of Prussia, 37 mi away
Ranked #6 because of its Google rating and trade focus: 4.9★ from 189 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Palmerton, 9 mi away
Ranked #7 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 Allentown, 6 mi away
Ranked #8 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, 5 mi away
Ranked #9 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.
Based in Collegeville, 31 mi away
Ranked #10 because of its Google rating and trade focus: 4.4★ from 382 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bedminster, 21 mi away
Ranked #11 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 Bethlehem, 3 mi away
Ranked #12 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 Northampton, 8 mi away
Ranked #13 because of its Google rating and trade focus: 3.6★ from 20 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hellertown, 7 mi away
Ranked #14 because of its Google rating and review volume: 5.0★ from 49 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bethlehem, 8 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 9 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Pottstown, 28 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 40 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Norristown, 36 mi away
Ranked #17 because of its Google rating and trade focus: 4.9★ from 38 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Audubon, 35 mi away
Ranked #18 because of its Google rating and trade focus: 4.7★ from 14 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Willow Grove, 38 mi away
Ranked #19 because of its Google rating and trade focus: 4.7★ from 19 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bedminster, 33 mi away
Ranked #20 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 Audubon, 33 mi away
Ranked #21 because of its Google rating and trade focus: 4.7★ from 230 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Perkasie, 24 mi away
Ranked #22 because of its Google rating and review volume: 5.0★ from 199 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bedminster, 33 mi away
Ranked #23 because of its Google rating and trade focus: 4.5★ from 8 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Chester Springs, 40 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 26 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Norristown, 35 mi away
Ranked #25 because of its Google rating and trade focus: 4.7★ from 90 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
National price ranges in USD, not adjusted for Fullerton. 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 84 Fullerton 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 Fullerton 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 |