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Best Licensed Insulation Contractors in San Diego, CA

27 insulation companies registered in San Diego hold current CSLB licenses, verified against official records as of August 17, 2026. The 8 below are the top-ranked, ordered by years licensed.

How we chose: We identified 27 companies registered in San Diego. 27 passed license verification. The 8 below are the top-ranked of those. Our methodology

We earn a fee when you call businesses through numbers on this site. This never affects who is listed or how they rank.

  1. 1.Eco Services

    ✓ CSLB License #290497 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1973
    Phone
    (858) 530-1640

  2. 2.Daryl Griffis Acoustics Inc.

    ✓ CSLB License #402601 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1981
    Phone
    (619) 275-3060

  3. 3.Pacific Building Group

    ✓ CSLB License #502376 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1986
    Phone
    (858) 552-0600

  4. 4.Brien Plumbing Inc.

    ✓ CSLB License #682098 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1993
    Phone
    (619) 708-8649

  5. 5.C M Firestop Inc.

    ✓ CSLB License #775289 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2000
    Phone
    (858) 278-0296

  6. 6.Advanced Acoustic Contractors Inc.

    ✓ CSLB License #797369 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2001
    Phone
    (858) 452-2092

  7. 7.Pacific Rim Mechanical Contractors Inc.

    ✓ CSLB License #814462 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2002
    Phone
    (858) 974-6500

  8. 8.C M S Interiors Inc.

    ✓ CSLB License #871262 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2006
    Phone
    (858) 535-5500

Compare the top 6 at a glance

CompanyLicenseWorkers' compLicensed since
Eco Services#290497On file1973
Daryl Griffis Acoustics Inc.#402601On file1981
Pacific Building Group#502376On file1986
Brien Plumbing Inc.#682098Exempt or none on file1993
C M Firestop Inc.#775289On file2000
Advanced Acoustic Contractors Inc.#797369On file2001

San Diego County insulation licensure at a glance

California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 94 active C-2 insulation and acoustical licenses in San Diego County, 30 of them registered in San Diego. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median San Diego license has been held 12 years, and the longest-standing one dates to 1973. California law requires workers' compensation cover for C-2 licensees, so it is a legal baseline rather than a way to tell two contractors apart: 26 of San Diego's 30 licenses (86.7%) carry a current policy in CSLB's file, and we do not rank on it. The contractor bond is not a signal here: 94 of the county's 94 licenses carry the same $25,000 bond California sets by statute. 8 county licenses reach their expiration date within the next 90 days. CSLB cannot link straight to a license record, so every listing above shows its number for you to type into CSLB's license lookup. How we verify.

Insulation Contractors in San Diego: common questions

How many licensed insulation contractors are there in San Diego?

30 active C-2 insulation and acoustical licenses are registered in San Diego, out of 94 across San Diego County. 27 San Diego-registered companies passed our license verification, and the 8 on this page are the top-ranked of those. Only licenses CSLB shows as CLEAR and unexpired are listed.

Does California license insulation contractors?

Yes. California licenses contractors by classification, and C-2 is the CSLB classification that authorises this work. 30 active C-2 insulation and acoustical licenses are registered in San Diego and 94 across San Diego County, the longest-standing issued in 1973. Only CLEAR, unexpired licenses appear here.

How do I check an insulation contractor's license in California?

Every listing above shows its CSLB license number. CSLB cannot link straight to a record, so open its license lookup and type the number in: it shows status, expiration, the contractor bond and workers' compensation cover, which California requires of C-2 licensees and 26 of San Diego's 30 currently carry. 8 San Diego County licenses expire within 90 days.

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