923 general contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Islip: Dynoflip Construction, CR Score 63/100; 5.0★ from 160 Google reviews; open 7 days a week.
Best for emergencies (open 24/7): Power Group Construction Inc, posts 24/7 hours; ranked #2 of 923.
Most-reviewed: Professional Home Remodeling Inc., 522 Google reviews at 4.7★, the most of 923 ranked; ranked #46.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
923 Islip general contractors are ranked here by CR Score, from ten published factors. 104 are open 24/7, 495 open Saturdays and 215 open Sundays, based on posted hours. The median Google rating is 5.0★ across 923 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Dynoflip Construction | 63 | 5.0★ (160) | Hauppauge, 7 mi away | Sat · Sun | Overall |
| 2 | Power Group Construction Inc | 63 | 5.0★ (80) | Deer Park, 7 mi away | 24/7 | Emergencies |
| 3 | Gappsi, Inc. | 62 | 4.8★ (500) | Smithtown, 8 mi away | Sat | — |
| 4 | Lee Home Improvement | 62 | 5.0★ (170) | South Farmingdale, 12 mi away | 24/7 | — |
| 5 | Softwind Powerwashing & Paver Sealing | 62 | 5.0★ (52) | East Islip, 1 mi away | Sat · Sun | — |
| 6 | Diamond Ridge Builders & Restoration | 61 | 4.9★ (49) | Deer Park, 7 mi away | 24/7 | — |
| 7 | Kentstruction | 61 | 5.0★ (69) | Medford, 12 mi away | 24/7 | — |
| 8 | Asphalt D general contracting | 61 | 4.9★ (43) | Bayport, 8 mi away | 24/7 | — |
| 9 | Black Mold Removal Long Island | 60 | 4.8★ (23) | Bay Shore, 2 mi away | 24/7 | — |
| 10 | RC Contracting | 60 | 5.0★ (65) | Huntington, 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 because of its Google rating and trade focus: 5.0★ from 160 Google reviews, listed on Google as “Construction company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Deer Park, 7 mi away
Ranked #2 because of its Google rating and trade focus: 5.0★ from 80 Google reviews, listed on Google as “Contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Smithtown, 8 mi away
Ranked #3 because of its Google rating and trade focus: 4.8★ from 500 Google reviews, listed on Google as “Contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in South Farmingdale, 12 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 170 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in East Islip, 1 mi away
Ranked #5 because of its Google rating and trade focus: 5.0★ from 52 Google reviews, listed on Google as “Contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Deer Park, 7 mi away
Ranked #6 because of its Google rating and trade focus: 4.9★ from 49 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Medford, 12 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 69 Google reviews, listed on Google as “Construction company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bayport, 8 mi away
Ranked #8 because of its Google rating and trade focus: 4.9★ from 43 Google reviews, listed on Google as “Construction company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bay Shore, 2 mi away
Ranked #9 because of its Google rating and trade focus: 4.8★ from 23 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Huntington, 14 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 65 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in West Hills, 10 mi away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 40 Google reviews, listed on Google as “Construction company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in East Islip, 1 mi away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 136 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Central Islip, 4 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 70 Google reviews, listed on Google as “Contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in North Babylon, 6 mi away
Ranked #14 because of its Google rating and trade focus: 4.4★ from 41 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in North Babylon, 6 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 18 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Brentwood, 5 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 14 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bayport, 9 mi away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 39 Google reviews, listed on Google as “Contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Holbrook, 9 mi away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 37 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Glen Cove, 23 mi away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 83 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Babylon, 6 mi away
Ranked #20 because of its Google rating and trade focus: 5.0★ from 12 Google reviews, listed on Google as “Construction company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in West Babylon, 9 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 65 Google reviews, listed on Google as “Construction company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lindenhurst, 9 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 55 Google reviews, listed on Google as “Contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Farmingdale, 11 mi away
Ranked #23 because of its Google rating and trade focus: 5.0★ from 20 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Huntington, 11 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 19 Google reviews, listed on Google as “Contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Centereach, 12 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 21 Google reviews, listed on Google as “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 923 ranked general contractors here; the rest are on their profiles.
20 more general contractors within 25 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 |
|---|---|---|
| Ashlar Contracting | 5.0★ (2) | 2 mi |
| Ayala's Construction | In Islip | |
| Buildwell Construction Inc | 3.0★ (2) | 2 mi |
| Department of Planning & Dev | 3.0★ (2) | In Islip |
| Edward Construction. Corp | 5.0★ (2) | 3 mi |
| Friendly Construction Co | In Islip | |
| G Gilbert's Construction | 5.0★ (2) | 3 mi |
| Garay Home Improvement | 4.5★ (2) | 2 mi |
| Gidch Construction Inc | 3.0★ (2) | In Islip |
| Great River Construction Co | 5.0★ (2) | 2 mi |
| Great South Bay Home Improvements | 5.0★ (2) | 1 mi |
| Hendriks Contracting Corp | 5.0★ (2) | 3 mi |
| J. Carleton Contracting, Inc. | 5.0★ (2) | In Islip |
| Leo zaruma home improvement | In Islip | |
| LFG Rigging Inc (Office) | 3.0★ (2) | 3 mi |
| Remodeling L&J | 5.0★ (2) | 2 mi |
| Sandstorm Construction | 3.0★ (2) | 3 mi |
| Schillco Mechanical | In Islip | |
| Tufco Inc | 5.0★ (1) | In Islip |
| W. Siebert Contracting | 3.5★ (2) | 1 mi |
Typical prices in USD, adjusted for New York with a published regional index. Each row names its basis and month.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Kitchen remodel | $16,000 | $29,600 | $45,640 | Per project: typical range of customer-reported remodels (about $75 to $250 per sq ft). US national range × 1.10 Middle Atlantic factor (2025 Cost vs. Value Report) | October 2026 |
| Bathroom remodel | $7,670 | $14,020 | $20,380 | Per bathroom: typical range of customer-reported remodels. US national range × 1.15 Middle Atlantic factor (2025 Cost vs. Value Report) | October 2026 |
We scored 923 Islip general contractors 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 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 |