842 general contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Lake Ronkonkoma: Dynoflip Construction, CR Score 64/100; 5.0★ from 160 Google reviews; open 7 days a week.
Best for emergencies (open 24/7): Kentstruction, posts 24/7 hours; ranked #2 of 842.
Most-reviewed: Gappsi, Inc., 500 Google reviews at 4.8★, the most of 842 ranked; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
842 Lake Ronkonkoma general contractors are ranked here by CR Score, from ten published factors. 95 are open 24/7, 450 open Saturdays and 184 open Sundays, based on posted hours. The median Google rating is 5.0★ across 842 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Dynoflip Construction | 64 | 5.0★ (160) | Hauppauge, 4 mi away | Sat · Sun | Overall |
| 2 | Kentstruction | 63 | 5.0★ (69) | Medford, 6 mi away | 24/7 | Emergencies |
| 3 | Gappsi, Inc. | 62 | 4.8★ (500) | Smithtown, 6 mi away | Sat | Most reviews |
| 4 | Power Group Construction Inc | 61 | 5.0★ (80) | Deer Park, 12 mi away | 24/7 | — |
| 5 | Asphalt D general contracting | 61 | 4.9★ (43) | Bayport, 7 mi away | 24/7 | — |
| 6 | David’s Home Improvements | 60 | 5.0★ (21) | Centereach, 4 mi away | 24/7 | — |
| 7 | SPIRIT CONTRACTING INC. | 60 | 5.0★ (37) | Holbrook, 3 mi away | Sat · Sun · Evenings | — |
| 8 | Lee Home Improvement | 60 | 5.0★ (170) | South Farmingdale, 18 mi away | 24/7 | — |
| 9 | RC Contracting | 60 | 5.0★ (65) | Huntington, 16 mi away | 24/7 | — |
| 10 | Softwind Powerwashing & Paver Sealing | 60 | 5.0★ (52) | East Islip, 8 mi away | Sat · Sun | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Ranked #1 because of its Google rating and trade focus: 5.0★ from 160 Google reviews, listed on Google as “Construction company”.
Based in Medford, 6 mi away
Ranked #2 because of its Google rating and trade focus: 5.0★ from 69 Google reviews, listed on Google as “Construction company”.
Based in Smithtown, 6 mi away
Ranked #3 because of its Google rating and review volume: 4.8★ from 500 Google reviews, the most in Lake Ronkonkoma.
Based in Deer Park, 12 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 80 Google reviews, listed on Google as “Contractor”.
Based in Bayport, 7 mi away
Ranked #5 because of its Google rating and trade focus: 4.9★ from 43 Google reviews, listed on Google as “Construction company”.
Based in Centereach, 4 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 21 Google reviews, listed on Google as “Contractor”.
Based in Holbrook, 3 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 37 Google reviews, listed on Google as “General contractor”.
Based in South Farmingdale, 18 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 170 Google reviews, listed on Google as “General contractor”.
Based in Huntington, 16 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 65 Google reviews, listed on Google as “General contractor”.
Based in East Islip, 8 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 52 Google reviews, listed on Google as “Contractor”.
Based in Central Islip, 4 mi away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 70 Google reviews, listed on Google as “Contractor”.
Based in Deer Park, 13 mi away
Ranked #12 because of its Google rating and trade focus: 4.9★ from 49 Google reviews, listed on Google as “General contractor”.
Based in West Hills, 12 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 40 Google reviews, listed on Google as “Construction company”.
Based in Port Jefferson Station, 8 mi away
Ranked #14 because of its Google rating and trade focus: 4.9★ from 115 Google reviews, listed on Google as “General contractor”.
Based in Bayport, 7 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 39 Google reviews, listed on Google as “Contractor”.
Based in Selden, 5 mi away
Ranked #16 because of its Google rating and trade focus: 4.4★ from 25 Google reviews, listed on Google as “General contractor”.
Based in Kew Gardens Hills, 4 mi away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 26 Google reviews, listed on Google as “Construction company”.
Based in Forest Hills, 9 mi away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 22 Google reviews, listed on Google as “Construction company”.
Based in Salisbury, 7 mi away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 85 Google reviews, listed on Google as “General contractor”.
Based in Holtsville, 4 mi away
Ranked #20 because of its Google rating and trade focus: 4.5★ from 17 Google reviews, listed on Google as “Construction company”.
Based in Centereach, 3 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 20 Google reviews, listed on Google as “Construction company”.
Based in Bay Shore, 10 mi away
Ranked #22 because of its Google rating and trade focus: 4.8★ from 23 Google reviews, listed on Google as “General contractor”.
Based in Coram, 10 mi away
Ranked #23 because of its Google rating and trade focus: 5.0★ from 19 Google reviews, listed on Google as “Construction company”.
Based in East Islip, 8 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 136 Google reviews, listed on Google as “General contractor”.
Based in Selden, 5 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 23 Google reviews, listed on Google as “Contractor”.
#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 842 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 |
|---|---|---|
| AD Builders | 5.0★ (2) | 3 mi |
| AP Design And Trim Inc | 5.0★ (1) | In Lake Ronkonkoma |
| Baron II Contracting | 3.0★ (2) | 2 mi |
| Build NY Services | 5.0★ (1) | In Lake Ronkonkoma |
| Castro Quality Construction LLC | 5.0★ (1) | In Lake Ronkonkoma |
| Charel Contracting & Maintenance Co | 4.0★ (2) | 1 mi |
| Covenant Carpentry Inc | 5.0★ (2) | 2 mi |
| Daniel R O'Brien Contracting | 5.0★ (2) | 3 mi |
| Dml Interiors | 5.0★ (2) | 3 mi |
| GIOVANNI HOME IMPROVEMENT LLC | In Lake Ronkonkoma | |
| Katlenco Enterprises Inc | 4.0★ (2) | 2 mi |
| L&V Mechanical | 1.0★ (2) | 1 mi |
| Maintenance Experts of Long Island | 3.0★ (2) | 2 mi |
| MNJ Construction Services | 1.0★ (1) | In Lake Ronkonkoma |
| Niemand's Home Improvement | 5.0★ (2) | 3 mi |
| Redwood Construction Management | In Lake Ronkonkoma | |
| Sumrick Builders | 4.8★ (61) | In Lake Ronkonkoma |
| T G Nickel & Associates Llc | 4.5★ (2) | 3 mi |
| Tom Dee Home Improvements | 5.0★ (2) | 2 mi |
| Valenti Flooring Inc | 4.9★ (151) | In Lake Ronkonkoma |
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 842 Lake Ronkonkoma 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 Lake Ronkonkoma 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 |