Top-Rated Insulation Installers in San Jose, CA

9 local companies ranked by 1,500 Google reviews. Free to compare, no sign-up.

Ratings collected September 2026 · Page updated September 30, 2026

9Companies
1,500Google reviews
4.8★Average rating
Sep 2026Data collected
Ranked by Google reviewsNever paid forFree to compare

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 9 listed

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  1. 1
    Attic TeamTop pickHighest rating (50+ reviews)
    5.0 (96 Google reviews)
    2175 The Alameda #209, San Jose, CA 95126
    Call (408) 750-9546WebsiteGoogle reviewsDirectionsEmail [email protected]
  2. 2
    Attic ProsTop pick
    4.9 (386 Google reviews)
    3071 Monterey Rd suit b, San Jose, CA 95111
    Call (800) 543-0382WebsiteGoogle reviewsDirections
  3. 3
    Attic Bros, Inc.Top pick
    4.9 (325 Google reviews)
    1942 O'Toole Way, San Jose, CA 95131
    Call (408) 990-6418WebsiteGoogle reviewsDirections
  4. 4
    Ideal Attic Insulation
    5.0 (59 Google reviews)
    1050 E Santa Clara St, San Jose, CA 95116
    Call (408) 366-9683WebsiteGoogle reviewsDirectionsEmail [email protected]
  5. 5
    Attic Crew
    4.9 (143 Google reviews)
    3535 Ross Ave Suite 106, San Jose, CA 95124
    Call (800) 558-5857WebsiteGoogle reviewsDirections
  6. 6
    Triumph Insulation Solution San Jose
    5.0 (28 Google reviews)
    377 Avenida Arboles, San Jose, CA 95123
    Call (408) 922-9608WebsiteGoogle reviewsDirections
  7. 7
    HVAC GurusMost reviews
    4.7 (438 Google reviews)
    75 Phelan Ave Unit 6, San Jose, CA 95112
    Call (408) 499-0494WebsiteGoogle reviewsDirectionsEmail [email protected]
  8. 8
    AttiCity
    4.6 (12 Google reviews)
    640 Epic Way, San Jose, CA 95134
    Call (408) 544-0804Google reviewsDirections
  9. 9
    Attic City San Jose
    4.5 (13 Google reviews)
    1530 Southwest Expy Ste 221, San Jose, CA 95126
    Call (650) 535-1966Google reviewsDirections

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 never paid for. How we rank and how we make money.

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What a insulation costs in San Jose

Typical installed priceVaries by area

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.

Insulation rebates open in San Joseup to $1,600

That could cut your cost by up to $1,600 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.

Get free quotes from these insulation installers

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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 a insulation installer

  1. Ask whether they will air-seal before insulating, and what they will seal (attic hatch, pot lights, pipes, top plates).
  2. Ask for the R-value before and after for each area, and the material and depth they will install.
  3. Ask whether your rebate needs an energy assessment before and after the work, and who books it.
  4. Ask how they handle ventilation and any old insulation that could contain vermiculite (asbestos risk).

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.

See every rebate in San Jose

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