408 foundation repair companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in West Islip: Chris Landscaping & Basement Waterproofing corp, CR Score 61/100; 5.0★ from 74 Google reviews; open 7 days a week.
Best for emergencies (open 24/7): HRC Waterproofing, posts 24/7 hours; ranked #2 of 408.
Most-reviewed: Healthy Basement Systems, 601 Google reviews at 4.8★, the most of 408 ranked; ranked #41.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
408 West Islip foundation repair companies are ranked here by CR Score, from ten published factors. 105 are open 24/7, 341 open Saturdays and 266 open Sundays, based on posted hours. The median Google rating is 5.0★ across 408 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Chris Landscaping & Basement Waterproofing corp | 61 | 5.0★ (74) | West Hills, 11 mi away | Sat · Sun | Overall |
| 2 | HRC Waterproofing | 60 | 4.9★ (77) | Jamaica, 26 mi away | 24/7 | Emergencies |
| 3 | BOCCIA - Waterproofing & Masonry Specialists | 60 | 4.7★ (115) | Garden City Park, 19 mi away | Sat · Sun · Evenings | — |
| 4 | Bonded Waterproofing Solutions | 59 | 5.0★ (130) | Bergenfield, 39 mi away | 24/7 | — |
| 5 | Building Structures Unlimited Inc. | 59 | 5.0★ (69) | Melville, 10 mi away | Sat | — |
| 6 | Vulcan Basement Waterproofing | 59 | 4.5★ (23) | Hicksville, 11 mi away | 24/7 | — |
| 7 | Genstar Masonry and Landscaping | 59 | 5.0★ (479) | Massapequa, 8 mi away | Sat · Sun · Evenings | — |
| 8 | Pappy's Ultimate Construction, Drainage & Waterproofing | 59 | 5.0★ (102) | Centereach, 15 mi away | 24/7 | — |
| 9 | A.M. Shield Waterproofing Corp. | 59 | 5.0★ (215) | Albertson, 18 mi away | — | — |
| 10 | JJM Roofing & Waterproofing | 59 | 4.9★ (93) | Westbury, 14 mi away | 24/7 | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Ranked #1 in West Islip
Based in West Hills, 11 mi away
Ranked #1 because of its Google rating and trade focus: 5.0★ from 74 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Jamaica, 26 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 77 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Garden City Park, 19 mi away
Ranked #3 because of its Google rating and trade focus: 4.7★ from 115 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bergenfield, 39 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 130 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Melville, 10 mi away
Ranked #5 because of its Google rating and trade focus: 5.0★ from 69 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hicksville, 11 mi away
Ranked #6 because of its Google rating and trade focus: 4.5★ from 23 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Massapequa, 8 mi away
Ranked #7 because of its Google rating and review volume: 5.0★ from 479 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Centereach, 15 mi away
Ranked #8 because of its Google rating and review volume: 5.0★ from 102 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Albertson, 18 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 215 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Westbury, 14 mi away
Ranked #10 because of its Google rating and review volume: 4.9★ from 93 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in West Babylon, 3 mi away
Ranked #11 because of its Google rating and review volume: 5.0★ from 68 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sayville, 12 mi away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 15 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Massapequa, 7 mi away
Ranked #13 because of its Google rating and trade focus: 4.9★ from 57 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Rye, 28 mi away
Ranked #14 because of its Google rating and trade focus: 4.6★ from 29 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Melville, 9 mi away
Ranked #15 because of its Google rating and review volume: 4.9★ from 95 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Caldwell, 39 mi away
Ranked #16 because of its Google rating and trade focus: 4.9★ from 36 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Jamaica, 24 mi away
Ranked #17 because of its Google rating and trade focus: 4.7★ from 30 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bay Shore, 5 mi away
Ranked #18 because of its Google rating and trade focus: 4.7★ from 15 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Nesconset, 13 mi away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 17 Google reviews, listed on Google as “Waterproofing service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Briarcliff Manor, 37 mi away
Ranked #20 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 Carlstadt, 40 mi away
Ranked #21 because of its Google rating and trade focus: 4.8★ from 42 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Medford, 17 mi away
Ranked #22 because of its Google rating and review volume: 4.9★ from 126 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Amityville, 21 mi away
Ranked #23 because of its Google rating and trade focus: 5.0★ from 15 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Huntington, 14 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Glen Cove, 20 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 74 Google reviews, listed on Google as “Roofing contractor”.
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 408 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 |
|---|---|---|
| Ajrin Construction Inc. | 5.0★ (2) | 30 mi |
| American Dry Basement Systems | 5.0★ (2) | 28 mi |
| ARTISON FRAMING CONTRACTORS | In West Islip | |
| Aslam Roofing and Waterproofing. | 5.0★ (2) | 23 mi |
| Crown Waterproofing | 4.5★ (2) | 31 mi |
| cz construction ny llc | 5.0★ (8) | In West Islip |
| Diamond NY Construction | 3.0★ (2) | 28 mi |
| Grant’s Customs Carpentry LLC | 5.0★ (2) | 27 mi |
| I.K Construction | 5.0★ (2) | 30 mi |
| Innovate Builders Inc | 3.0★ (2) | 21 mi |
| Liberty Masonry & Waterproofing | 1.0★ (2) | 32 mi |
| Maestro Builders Corporation | 5.0★ (2) | 32 mi |
| Maintenance Experts of Long Island | 3.0★ (2) | 13 mi |
| New York Enviro-Foam | 5.0★ (2) | 32 mi |
| Power Roofing & Siding Bushwick Brooklyn | 5.0★ (2) | 32 mi |
| Rohan's General Construction LLC | 5.0★ (2) | 33 mi |
| Shoot Installers INC. | 5.0★ (2) | 30 mi |
| Torres Line Construction | 5.0★ (2) | 14 mi |
| Tur Contracting Inc. | 3.0★ (2) | 30 mi |
| Waterproofing Restoration of Baldwin | 5.0★ (2) | 16 mi |
National price ranges in USD, not adjusted for West Islip. 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 408 West Islip 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 West Islip 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 |