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Best Licensed Insulation Contractors in San Rafael, CA

4 insulation companies registered in San Rafael hold current CSLB licenses, verified against official records as of August 17, 2026. All 4 are listed below, ordered by years licensed.

How we chose: We identified 4 companies registered in San Rafael. 4 passed license verification. All 4 are listed below. 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.O Mike's Construction Company Inc.

    ✓ CSLB License #778916 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2000
    Phone
    (415) 272-5158

  2. 2.San Francisco Interiors Inc.

    ✓ CSLB License #804224 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2002
    Phone
    (415) 526-1100

  3. 3.Gilmore Company

    ✓ CSLB License #941806 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2010
    Phone
    (415) 370-4591

  4. 4.Eco Attic Systems

    ✓ CSLB License #1082470 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2021
    Phone
    (415) 720-2560

Compare the top 4 at a glance

CompanyLicenseWorkers' compLicensed since
O Mike's Construction Company Inc.#778916Exempt or none on file2000
San Francisco Interiors Inc.#804224On file2002
Gilmore Company#941806On file2010
Eco Attic Systems#1082470Exempt or none on file2021

Marin County insulation licensure at a glance

California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 12 active C-2 insulation and acoustical licenses in Marin County, 4 of them registered in San Rafael. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median San Rafael license has been held 16 years, and the longest-standing one dates to 2000. 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: 2 of San Rafael's 4 licenses (50.0%) carry a current policy in CSLB's file, and we do not rank on it. The contractor bond is not a signal here: 12 of the county's 12 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 Rafael: common questions

How many licensed insulation contractors are there in San Rafael?

4 active C-2 insulation and acoustical licenses are registered in San Rafael, out of 12 across Marin County. 4 San Rafael-registered companies passed our license verification, and all 4 are listed on this page. 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. 4 active C-2 insulation and acoustical licenses are registered in San Rafael and 12 across Marin County, the longest-standing issued in 2000. 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 2 of San Rafael's 4 currently carry. 1 Marin County license expires within 90 days.

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