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Best Licensed Insulation Contractors in Santa Fe Springs, CA

4 insulation companies registered in Santa Fe Springs 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 Santa Fe Springs. 4 passed license verification. All 4 are listed below. Our methodology

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  1. 1.Kerco Inc.

    ✓ CSLB License #608312 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1990
    Phone
    (562) 630-7575

  2. 2.Interior Plus Inc.

    ✓ CSLB License #760890 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1999
    Phone
    (562) 464-6950

  3. 3.Castlerock Environmental Inc.

    ✓ CSLB License #776105 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2000
    Phone
    (562) 941-9244

  4. 4.Otter Insulation LLC

    ✓ CSLB License #1109322 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2023
    Phone
    (323) 229-7078

Compare the top 4 at a glance

CompanyLicenseWorkers' compLicensed since
Kerco Inc.#608312On file1990
Interior Plus Inc.#760890On file1999
Castlerock Environmental Inc.#776105On file2000
Otter Insulation LLC#1109322On file2023

Los Angeles County insulation licensure at a glance

California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 133 active C-2 insulation and acoustical licenses in Los Angeles County, 5 of them registered in Santa Fe Springs. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Santa Fe Springs license has been held 26 years, and the longest-standing one dates to 1990. 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: 5 of Santa Fe Springs's 5 licenses (100.0%) carry a current policy in CSLB's file, and we do not rank on it. The contractor bond is not a signal here: 133 of the county's 133 licenses carry the same $25,000 bond California sets by statute. 10 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 Santa Fe Springs: common questions

How many licensed insulation contractors are there in Santa Fe Springs?

5 active C-2 insulation and acoustical licenses are registered in Santa Fe Springs, out of 133 across Los Angeles County. 4 Santa Fe Springs-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 Santa Fe Springs and 133 across Los Angeles County, the longest-standing issued in 1990. 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 5 of Santa Fe Springs's 5 currently carry. 10 Los Angeles County licenses expire within 90 days.

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