14 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Gilroy: Attic Pros, CR Score 61/100; 4.7★ from 104 Google reviews; open 24/7.
Best for emergencies (open 24/7): Dirty Duct Guys LLC, posts 24/7 hours; ranked #12 of 14.
Most-reviewed: Garlic City Handyman Services, 53 Google reviews at 4.9★, the most of 14 ranked after Attic Pros; ranked #4.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
14 Gilroy insulation contractors are ranked here by CR Score, from ten published factors. 2 are open 24/7, 3 open Saturdays and 3 open Sundays, based on posted hours. The median Google rating is 5.0★ across 14 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Attic Pros | 61 | 4.7★ (104) | San Jose, 25 mi away | 24/7 | Overall |
| 2 | Coast Building Products: | 58 | 4.6★ (7) | Gilroy | — | — |
| 3 | Nor-Cal Insulation Inc. | 56 | 5.0★ (22) | Hollister, 12 mi away | — | — |
| 4 | Garlic City Handyman Services | 55 | 4.9★ (53) | Gilroy | — | Most reviews |
| 5 | HM Insulation Inc. | 54 | 5.0★ (22) | Aptos, 18 mi away | — | — |
| 6 | San Jose Spray Foam Insulation | 54 | 5.0★ (16) | Fremont, 15 mi away | — | — |
| 7 | Ponzini Insulation Inc | 54 | 4.6★ (12) | Prunedale, 11 mi away | — | — |
| 8 | Sanden Insulation | 53 | 5.0★ (13) | Watsonville, 17 mi away | — | — |
| 9 | OJ Insulation | 52 | 4.4★ (7) | Gilroy | — | — |
| 10 | Tri-County Insulation & Acoustical Contractors | 51 | 4.8★ (9) | San Jose, 20 mi away | — | — |
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 review volume: 4.7★ from 104 Google reviews, the most in Gilroy.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Gilroy
Ranked #2 because of its Google rating and trade focus: 4.6★ from 7 Google reviews, listed on Google as “Insulation contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Hollister, 12 mi away
Ranked #3 because of its Google rating and trade focus: 5.0★ from 22 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Gilroy
Ranked #4 because of its Google rating and review volume: 4.9★ from 53 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Aptos, 18 mi away
Ranked #5 because of its Google rating and trade focus: 5.0★ from 22 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fremont, 15 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 16 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Prunedale, 11 mi away
Ranked #7 because of its Google rating and trade focus: 4.6★ from 12 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Watsonville, 17 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 13 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Gilroy
Ranked #9 because of its Google rating and trade focus: 4.4★ from 7 Google reviews, listed on Google as “Roofing contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in San Jose, 20 mi away
Ranked #10 because of its Google rating and trade focus: 4.8★ from 9 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Morgan Hill, 24 mi away
Ranked #11 because of its Google rating and trade focus: 3.7★ from 3 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hollister, 22 mi away
Ranked #12 because of its Google rating and availability: 5.0★ from 3 Google reviews, open 24/7.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Prunedale, 22 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Prunedale, 15 mi away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Roofing contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
16 more insulation 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 |
|---|---|---|
| ALCAL Specialty Contracting Gilroy - Home Service Division | In Gilroy | |
| Atticare San Jose | 15 mi | |
| Godinez insulation inc | 5.0★ (1) | 22 mi |
| Golden Duct Cleaning Service | 23 mi | |
| Golden West Insulation Co | 24 mi | |
| Gr8 Attic Insulation San Jose | 15 mi | |
| Jake's Roofing & Coatings | 5.0★ (1) | 24 mi |
| Performance Foam Tech | 25 mi | |
| San Jose Insulation Pros | 25 mi | |
| Santa Cruz Insulation | 20 mi | |
| Saratoga Insulation | 15 mi | |
| South Bay Spray Foam | In Gilroy | |
| Stellar Attic Inc. | 5.0★ (1) | In Gilroy |
| Superb Attic Cleaning Morgan Hill | 5.0★ (1) | 11 mi |
| Temp Control-HVAC | Best Hvac Services in san jose | 5.0★ (1) | In Gilroy |
| Triumph Insulation Solution San Jose | 23 mi |
National price ranges in USD, not adjusted for Gilroy. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Attic insulation | $1,700 | $2,100 | $2,500 | Per attic: typical range of customer-reported jobs (about $1 to $3 per sq ft). US national range | October 2026 |
We scored 14 Gilroy insulation 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 Gilroy 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 |