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Best Licensed Insulation Contractors in Watsonville, CA

4 insulation companies registered in Watsonville 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 Watsonville. 4 passed license verification. All 4 are listed below. Our methodology

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  1. 1.Granite Industrial Inc.

    ✓ CSLB License #89 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1929
    Phone
    (831) 768-4086

  2. 2.Santa Cruz Insulation

    ✓ CSLB License #816692 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2003
    Phone
    (831) 247-4590

  3. 3.Sanden Construction Inc.

    ✓ CSLB License #1024054 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2017
    Phone
    (831) 708-2713

  4. 4.Hm Insulation Inc.

    ✓ CSLB License #1093732 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2022
    Phone
    (831) 247-1575

Compare the top 4 at a glance

CompanyLicenseWorkers' compLicensed since
Granite Industrial Inc.#89On file1929
Santa Cruz Insulation#816692Exempt or none on file2003
Sanden Construction Inc.#1024054On file2017
Hm Insulation Inc.#1093732On file2022

Santa Cruz County insulation licensure at a glance

California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 6 active C-2 insulation and acoustical licenses in Santa Cruz County, 5 of them registered in Watsonville. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Watsonville license has been held 9 years, and the longest-standing one dates to 1929. 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: 4 of Watsonville's 5 licenses (80.0%) carry a current policy in CSLB's file, and we do not rank on it. The contractor bond is not a signal here: 6 of the county's 6 licenses carry the same $25,000 bond California sets by statute. 0 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 Watsonville: common questions

How many licensed insulation contractors are there in Watsonville?

5 active C-2 insulation and acoustical licenses are registered in Watsonville, out of 6 across Santa Cruz County. 4 Watsonville-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. 5 active C-2 insulation and acoustical licenses are registered in Watsonville and 6 across Santa Cruz County, the longest-standing issued in 1929. 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 4 of Watsonville's 5 currently carry. 0 Santa Cruz County licenses expire within 90 days.

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