Top-Rated Insulation Installers in San Francisco, CA

3 local companies ranked by 143 Google reviews. Free to compare, no sign-up.

Ratings collected September 2026 · Page updated September 30, 2026

3Companies
143Google reviews
5.0★Average rating
Sep 2026Data collected
Ranked by Google reviewsNever paid forFree to compare

Short answer: The top-rated insulation installers in San Francisco are USA Spray Me Spray Foam Insulation Contractor (5.0★, 76 reviews), Juniper Insulation (5.0★, 31 reviews), Building Efficiency, Inc. (4.9★, 36 reviews).

Insulation installers in San Francisco, ranked 3 listed

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  1. 1
    USA Spray Me Spray Foam Insulation ContractorTop pickMost reviews
    5.0 (76 Google reviews)
    800 Avenue H, San Francisco, CA 94130
    Call (415) 483-9732WebsiteGoogle reviewsDirectionsEmail [email protected]
  2. 2
    Juniper InsulationTop pick
    5.0 (31 Google reviews)
    1240 Bush St, San Francisco, CA 94109
    Call (415) 634-6245WebsiteGoogle reviewsDirections
  3. 3
    Building Efficiency, Inc.Top pick
    4.9 (36 Google reviews)
    2037 Irving St Ste 213, San Francisco, CA 94122
    Call (415) 831-4535WebsiteGoogle reviewsDirections

Together these 3 companies average 5.0★ across 143 reviews. USA Spray Me Spray Foam Insulation Contractor has the most reviews (76).

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 Francisco

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 Franciscoup 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.

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Why insulation matters in San Francisco

In San Francisco, the average January low is 8°C (46°F), colder than 6% 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 Francisco. 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 Francisco.

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