Top-Rated Insulation Installers in San Diego, CA

8 local companies ranked by 1,845 Google reviews. Free to compare, no sign-up.

Ratings collected September 2026 · Page updated September 30, 2026

8Companies
1,845Google reviews
4.9★Average rating
Sep 2026Data collected
Ranked by Google reviewsNever paid forFree to compare

Short answer: The top-rated insulation installers in San Diego are Advanced Insulation System (5.0★, 150 reviews), Attic Heroes (5.0★, 119 reviews), Attic Projects Company (4.9★, 996 reviews).

Insulation installers in San Diego, ranked 8 listed

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  1. 1
    Advanced Insulation SystemTop pickHighest rating (50+ reviews)
    5.0 (150 Google reviews)
    5044 Ruffner St, San Diego, CA 92111
    Call (858) 758-1814WebsiteGoogle reviewsDirectionsEmail [email protected]
  2. 2
    Attic HeroesTop pick
    5.0 (119 Google reviews)
    6051 Business Center Ct, San Diego, CA 92154
    Call (619) 777-7021WebsiteGoogle reviewsDirectionsEmail [email protected]
  3. 3
    Attic Projects CompanyTop pickMost reviews
    4.9 (996 Google reviews)
    7840 Dunbrook Rd, San Diego, CA 92126
    Call (858) 246-7421WebsiteGoogle reviewsDirectionsEmail [email protected]
  4. 4
    Attic Construction
    4.9 (317 Google reviews)
    4164 Cartagena Dr, San Diego, CA 92115
    Call (858) 492-7289WebsiteGoogle reviewsDirectionsEmail [email protected]
  5. 5
    California Attic & Build
    4.9 (163 Google reviews)
    4901 Morena Blvd, San Diego, CA 92117
    Call (619) 975-3126WebsiteGoogle reviewsDirections
  6. 6
    Green Faith Attic Solutions
    5.0 (40 Google reviews)
    1455 Frazee Rd Ste 500, San Diego, CA 92108
    Call (602) 471-1435Google reviewsDirections
  7. 7
    Miramar SD Insulation Inc.
    5.0 (31 Google reviews)
    7950 Silverton Ave Ste 110, San Diego, CA 92126
    Call (619) 391-3037WebsiteGoogle reviewsDirections
  8. 8
    Integrity Spray Foam San Diego
    5.0 (29 Google reviews)
    900 F St Ste 423, San Diego, CA 92101
    Call (619) 789-6324WebsiteGoogle reviewsDirections

Together these 8 companies average 4.9★ across 1,845 reviews. Attic Projects Company has the most reviews (996).

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 Diego

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.

Rebates open in San DiegoNone confirmed right now

Financing or future programs may still help. Check the rebate page before you sign.

Rebates: our verified program data, checked monthly. Always confirm the exact amount for your home.

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Why insulation matters in San Diego

In San Diego, the average January low is 9°C (48°F), colder than 1% 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 Diego. 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 Diego.

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