Top-Rated Insulation Installers in San Jose, CA
9 local companies ranked by 1,500 Google reviews. Free to compare, no sign-up.
Short answer: The top-rated insulation installers in San Jose are Attic Team (5.0★, 96 reviews), Attic Pros (4.9★, 386 reviews), Attic Bros, Inc. (4.9★, 325 reviews).
Insulation installers in San Jose, ranked
- 5.0 (96 Google reviews)2175 The Alameda #209, San Jose, CA 95126
- 4.9 (386 Google reviews)3071 Monterey Rd suit b, San Jose, CA 95111
- 4.9 (325 Google reviews)1942 O'Toole Way, San Jose, CA 95131
- 5.0 (59 Google reviews)1050 E Santa Clara St, San Jose, CA 95116
- 4.9 (143 Google reviews)3535 Ross Ave Suite 106, San Jose, CA 95124
- 5.0 (28 Google reviews)377 Avenida Arboles, San Jose, CA 95123
- HVAC GurusMost reviews4.7 (438 Google reviews)75 Phelan Ave Unit 6, San Jose, CA 95112
- 4.6 (12 Google reviews)640 Epic Way, San Jose, CA 95134
- 4.5 (13 Google reviews)1530 Southwest Expy Ste 221, San Jose, CA 95126
Together these 9 companies average 4.8★ across 1,500 reviews. HVAC Gurus has the most reviews (438).
Ranked by Google rating weighted by review count, collected September 2026. Rankings are not paid for. How we rank and how we make money.
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What a insulation costs in San Jose
Price depends on which areas you insulate (attic, walls, basement) and how much air sealing is needed. Ask each company for a price per area and the R-value you end up with, so quotes are easy to compare.
That could cut your cost by up to $700 if you qualify. Most rebates have rules (income, your current heating, a registered contractor, approval before work starts).
Rebates: our verified program data, checked monthly. Always confirm the exact amount for your home.
Talk to a home energy auditor first. Some utility programs want an audit before any work starts. See the home energy auditors we list.
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Why insulation matters in San Jose
In San Jose, the average January low is 7°C (44°F), colder than 11% of the 123 cities we track. Winters here are mild, so comfort and summer heat matter as much as heating bills. Air sealing and attic insulation still help most, and they also keep upstairs rooms cooler in summer.
Most rebate programs pay only after an energy assessment, and some need one before the work too. Book it first.
Source: Open-Meteo historical weather data, 2015-2024.
Before you hire an insulation installer
- Ask whether they will air-seal before insulating, and what they will seal (attic hatch, pot lights, pipes, top plates).
- Ask for the R-value before and after for each area, and the material and depth they will install.
- Ask whether your rebate needs an energy assessment before and after the work, and who books it.
- Ask how they handle ventilation and any old insulation that could contain vermiculite (asbestos risk).
Questions about insulation installers in San Jose
Who is the best insulation installer in San Jose?
Based on Google reviews, the top-rated insulation installers in San Jose are Attic Team (5.0★, 96 reviews), Attic Pros (4.9★, 386 reviews), Attic Bros, Inc. (4.9★, 325 reviews). We rank by a review-weighted score, so companies with many strong reviews rank above those with only a few.
How are the insulation installers in San Jose ranked?
We list 9 insulation companies in San Jose, ranked by Google rating weighted by review count. Together they have 1,500 Google reviews and average 4.8 stars, collected September 2026. HVAC Gurus has the most reviews (438). No company pays to be listed or ranked.
How much does insulation cost in San Jose?
Insulation prices depend on which areas you insulate (attic, walls, basement) and how much air sealing is needed. Ask each company for a price per area and the R-value you end up with, so quotes are easy to compare.
Are there rebates for insulation in San Jose?
Yes. Our verified program data shows insulation rebates up to $700 open in San Jose. Most rebates have rules, such as income, your current heating, a registered contractor, or approval before work starts, so check the rebate page before you sign.
Is insulation worth it in San Jose?
In San Jose, the average January low is 7°C (44°F), colder than 11% of the 123 cities we track. Winters here are mild, so comfort and summer heat matter as much as heating bills. Air sealing and attic insulation still help most, and they also keep upstairs rooms cooler in summer. Most rebate programs pay only after an energy assessment, and some need one before the work too. Book it first.
What should I ask an insulation installer before I hire?
Ask whether they will air-seal before insulating, and what they will seal (attic hatch, pot lights, pipes, top plates). Ask for the R-value before and after for each area, and the material and depth they will install. Ask whether your rebate needs an energy assessment before and after the work, and who books it.
Before you call anyone, check what insulation rebates you can get in San Jose. Many programs require approval or a registered contractor before work starts.
Planning more upgrades? See the top-rated heat pump installers, solar installers, home battery installers in San Jose.
How to read these results
- Open the profile.How a installer describes its own work tells you a lot. Look for jobs like yours.
- Read the Google reviews.Stars and counts come from Google Maps. Click through and read what past customers wrote, good and bad.
- Check for program badges.A green registered-contractor badge means the company is on the program's own list, which some rebates require.
- Compare three.Do not stop at the first good installer. Three quotes show you the real range in price, equipment and plan.
Not ready to talk to a contractor yet?
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