98 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in San Mateo: Attic Pros, CR Score 64/100; 4.8★ from 1,938 Google reviews; open 24/7.
Best for emergencies (open 24/7): Insulation Solutions, posts 24/7 hours; ranked #5 of 98.
Most-reviewed: Service Champions, 2,337 Google reviews at 4.8★, the most of 98 ranked; ranked #23.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
98 San Mateo insulation contractors are ranked here by CR Score, from ten published factors. 25 are open 24/7, 69 open Saturdays and 55 open Sundays, based on posted hours. The median Google rating is 5.0★ across 98 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Attic Pros | 64 | 4.8★ (1,938) | Oakland, 14 mi away | 24/7 | Overall |
| 2 | Attic Star | 60 | 4.9★ (156) | Redwood City, 9 mi away | Sat · Sun · Evenings | — |
| 3 | Alley Cat - Rodent Exclusion Company | 60 | 4.9★ (413) | San Francisco, 16 mi away | Sat · Sun · Evenings | — |
| 4 | Atticare USA | 60 | 4.8★ (439) | San Leandro, 14 mi away | Sat · Sun · Evenings | — |
| 5 | Insulation Solutions | 59 | 5.0★ (11) | San Mateo | 24/7 | Emergencies |
| 6 | American Attic | 59 | 5.0★ (219) | Oakland, 16 mi away | Sat · Sun | — |
| 7 | Rywen Insulation Inc. | 59 | 5.0★ (151) | San Leandro, 13 mi away | Sat · Sun | — |
| 8 | Reactic Restoration | 58 | 5.0★ (12) | San Carlos, 5 mi away | 24/7 | — |
| 9 | EcoGuard Pest Management | 58 | 4.9★ (279) | Dublin, 19 mi away | Sat · Sun · Evenings | — |
| 10 | Attic Elite | 58 | 4.9★ (474) | Newark, 17 mi away | 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: 4.8★ from 1,938 Google reviews, listed on Google as “Insulation contractor”.
Based in Redwood City, 9 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 156 Google reviews, listed on Google as “Insulation contractor”.
Based in San Francisco, 16 mi away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 413 Google reviews, listed on Google as “Insulation contractor”.
Based in San Leandro, 14 mi away
Ranked #4 because of its Google rating and trade focus: 4.8★ from 439 Google reviews, listed on Google as “Insulation contractor”.
Based in San Mateo
Ranked #5 because of its Google rating and trade focus: 5.0★ from 11 Google reviews, listed on Google as “Insulation contractor”.
Based in Oakland, 16 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 219 Google reviews, listed on Google as “Insulation contractor”.
Based in San Leandro, 13 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 151 Google reviews, listed on Google as “Insulation contractor”.
Based in San Carlos, 5 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 12 Google reviews, listed on Google as “Insulation contractor”.
Based in Dublin, 19 mi away
Ranked #9 because of its Google rating and trade focus: 4.9★ from 279 Google reviews, listed on Google as “Insulation contractor”.
Based in Newark, 17 mi away
Ranked #10 because of its Google rating and trade focus: 4.9★ from 474 Google reviews, listed on Google as “Insulation contractor”.
Based in Hayward, 16 mi away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 48 Google reviews, listed on Google as “Insulation contractor”.
Based in San Mateo
Ranked #12 because of its Google rating and trade focus: 5.0★ from 9 Google reviews, listed on Google as “Insulation contractor”.
Based in Alameda, 22 mi away
Ranked #13 because of its Google rating and trade focus: 4.9★ from 76 Google reviews, listed on Google as “Insulation contractor”.
Based in Berkeley, 21 mi away
Ranked #14 because of its Google rating and trade focus: 4.9★ from 1,071 Google reviews, listed on Google as “Insulation contractor”.
Based in Palo Alto, 14 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 16 Google reviews, listed on Google as “Insulation contractor”.
Based in Oakland, 16 mi away
Ranked #16 because of its Google rating and trade focus: 4.7★ from 31 Google reviews, listed on Google as “Insulation contractor”.
Based in San Mateo
Ranked #17 because of its Google rating and review volume: 5.0★ from 66 Google reviews.
Based in Redwood Shores, 14 mi away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 13 Google reviews, listed on Google as “Insulation contractor”.
Based in Alameda, 3 mi away
Ranked #19 because of its Google rating and trade focus: 4.7★ from 14 Google reviews, listed on Google as “Insulation contractor”.
Based in Burlingame, 2 mi away
Ranked #20 because of its Google rating and trade focus: 4.8★ from 43 Google reviews, listed on Google as “Insulation contractor”.
Based in Redwood Shores, 6 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Insulation contractor”.
Based in Mountain View, 18 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 34 Google reviews, listed on Google as “Insulation contractor”.
Based in Pleasanton, 24 mi away
Ranked #23 because of its Google rating and review volume: 4.8★ from 2,337 Google reviews, the most in San Mateo.
Based in Daly City, 10 mi away
Ranked #24 because of its Google rating and trade focus: 4.0★ from 4 Google reviews, listed on Google as “Insulation contractor”.
Based in San Mateo
Ranked #25 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Insulation 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 98 ranked insulation contractors here; the rest are on their profiles.
20 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.
National price ranges in USD, not adjusted for San Mateo. 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 98 San Mateo 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 San Mateo 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 |