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Best Licensed Insulation Contractors in San Jose, CA

20 insulation companies registered in San Jose 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 20 companies registered in San Jose. 20 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.California Drywall Co

    ✓ CSLB License #148320 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1954
    Phone
    (408) 292-7500

  2. 2.Eric Stark Interiors Inc.

    ✓ CSLB License #591877 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1990
    Phone
    (408) 441-6136

  3. 3.Scates Construction Inc.

    ✓ CSLB License #703114 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1995
    Phone
    (408) 293-9050

  4. 4.Bay Weatherization & Insulation

    ✓ CSLB License #777747 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2000
    Phone
    (408) 690-9898

  5. 5.Bay Area Fireplace Const & Insulation

    ✓ CSLB License #814698 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2002
    Phone
    (408) 206-1107

  6. 6.Sbay Construction Inc.

    ✓ CSLB License #928101 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2009
    Phone
    (408) 490-4390

  7. 7.S B I Interiors Inc.

    ✓ CSLB License #983778 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2013
    Phone
    (408) 292-1800

  8. 8.California Insulation Contractor Inc. DBA Central California

    ✓ CSLB License #1018810 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2016
    Phone
    (408) 293-6755

Compare the top 6 at a glance

CompanyLicenseWorkers' compLicensed since
California Drywall Co#148320On file1954
Eric Stark Interiors Inc.#591877On file1990
Scates Construction Inc.#703114On file1995
Bay Weatherization & Insulation#777747Exempt or none on file2000
Bay Area Fireplace Const & Insulation#814698Exempt or none on file2002
Sbay Construction Inc.#928101On file2009

Santa Clara County insulation licensure at a glance

California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 51 active C-2 insulation and acoustical licenses in Santa Clara County, 20 of them registered in San Jose. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median San Jose license has been held 7 years, and the longest-standing one dates to 1954. 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: 14 of San Jose's 20 licenses (70.0%) carry a current policy in CSLB's file, and we do not rank on it. The contractor bond is not a signal here: 51 of the county's 51 licenses carry the same $25,000 bond California sets by statute. 1 county license reaches its 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 Jose: common questions

How many licensed insulation contractors are there in San Jose?

20 active C-2 insulation and acoustical licenses are registered in San Jose, out of 51 across Santa Clara County. 20 San Jose-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. 20 active C-2 insulation and acoustical licenses are registered in San Jose and 51 across Santa Clara County, the longest-standing issued in 1954. 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 14 of San Jose's 20 currently carry. 1 Santa Clara County license expires within 90 days.

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