218 foundation repair companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Darien: Perma-Seal Basement Systems, CR Score 89/100; 4.9★ from 12,405 Google reviews; open Saturdays until 12 PM.
Best for emergencies (open 24/7): U.S. Waterproofing, posts 24/7 hours; ranked #2 of 218.
Most-reviewed: U.S. Waterproofing, 1,411 Google reviews at 4.6★, the most of 218 ranked after Perma-Seal Basement Systems; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
218 Darien foundation repair companies are ranked here by CR Score, from 8 published factors. 33 are open 24/7, 167 open Saturdays and 64 open Sundays, based on posted hours. The median Google rating is 5.0★ across 218 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Perma-Seal Basement Systems | 89 | 4.9★ (12,405) | Burr Ridge, 3 mi away | Sat | Overall |
| 2 | U.S. Waterproofing | 87 | 4.6★ (1,411) | Schaumburg, 21 mi away | 24/7 | Emergencies, Most reviews |
| 3 | Accu-Dry Waterproofing & Concrete Pumping, Inc. | 87 | 4.9★ (196) | Westmont, 2 mi away | Sat · Sun · Evenings | — |
| 4 | ULB-DRY Waterproofing | 86 | 4.9★ (60) | Villa Park, 11 mi away | 24/7 | — |
| 5 | Basement Buddies Waterproofing | 85 | 4.7★ (35) | Wheaton, 11 mi away | 24/7 | — |
| 6 | Home Doctor Restoration | 85 | 4.8★ (44) | Schiller Park, 16 mi away | 24/7 | — |
| 7 | Seepage Seal | 85 | 5.0★ (57) | Lemont, 6 mi away | Sat · Sun · Evenings | — |
| 8 | ULB-DRY Waterproofing | 84 | 5.0★ (9) | Elmhurst, 13 mi away | 24/7 | — |
| 9 | L&P BASEMENT WATERPROOFING LLC INSURANCE & BONDED | 83 | 4.9★ (52) | Glendale Heights, 13 mi away | Sat · Sun · Evenings | — |
| 10 | Beverly Tuckpointing Total Brick Restoration | 83 | 5.0★ (5) | Chicago, 16 mi away | 24/7 | — |
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 review volume: 4.9★ from 12,405 Google reviews, the most Google reviews on this list (12,405).
Based in Schaumburg, 21 mi away
Ranked #2 because of its Google rating and availability: 4.6★ from 1,411 Google reviews, open 24/7.
Based in Westmont, 2 mi away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 196 Google reviews, listed on Google as “Waterproofing service”.
Based in Villa Park, 11 mi away
Ranked #4 because of its Google rating and availability: 4.9★ from 60 Google reviews, open 24/7.
Based in Wheaton, 11 mi away
Ranked #5 because of its Google rating and availability: 4.7★ from 35 Google reviews, open 24/7.
Based in Schiller Park, 16 mi away
Ranked #6 because of its Google rating and availability: 4.8★ from 44 Google reviews, open 24/7.
Based in Lemont, 6 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 57 Google reviews, listed on Google as “Waterproofing service”.
Based in Elmhurst, 13 mi away
Ranked #8 because of its Google rating and availability: 5.0★ from 9 Google reviews, open 24/7.
Based in Glendale Heights, 13 mi away
Ranked #9 because of its Google rating and trade focus: 4.9★ from 52 Google reviews, listed on Google as “Waterproofing service”.
Based in Chicago, 16 mi away
Ranked #10 because of its Google rating and availability: 5.0★ from 5 Google reviews, open 24/7.
Based in Plainfield, 14 mi away
Ranked #11 because of its Google rating and availability: 5.0★ from 228 Google reviews, open 24/7.
Based in Highland Park, 31 mi away
Ranked #12 because of its Google rating and availability: 4.9★ from 25 Google reviews, open 24/7.
Based in Frankfort, 16 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 38 Google reviews, listed on Google as “Waterproofing service”.
Based in Chicago, 20 mi away
Ranked #14 because of its Google rating and availability: 4.9★ from 270 Google reviews, open 24/7.
Based in Village of Campton Hills, 14 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 119 Google reviews, listed on Google as “Waterproofing service”.
Based in Chicago, 19 mi away
Ranked #16 because of its Google rating and availability: 5.0★ from 132 Google reviews, open 24/7.
Based in Frankfort, 20 mi away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 131 Google reviews, listed on Google as “Waterproofing service”.
Based in Chicago, 21 mi away
Ranked #18 because of its Google rating and availability: 4.9★ from 29 Google reviews, open 24/7.
Based in Naperville, 10 mi away
Ranked #19 because of its Google rating and trade focus: 4.1★ from 13 Google reviews, listed on Google as “Waterproofing service”.
Based in Winfield, 7 mi away
Ranked #20 because of its Google rating and trade focus: 5.0★ from 23 Google reviews, listed on Google as “Waterproofing service”.
Based in Chicago, 17 mi away
Ranked #21 because of its Google rating and availability: 4.9★ from 77 Google reviews, open 24/7.
Based in Elmwood Park, 15 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Waterproofing service”.
Based in Chicago, 17 mi away
Ranked #23 because of its Google rating and availability: 5.0★ from 74 Google reviews, open 7 days a week.
Based in Crest Hill, 14 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 38 Google reviews, listed on Google as “Waterproofing service”.
Based in Franklin Park, 12 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Waterproofing service”.
#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 218 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.
National price ranges in USD, not adjusted for Darien. 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 218 Darien 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 Darien 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 |