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Best Licensed Insulation Contractors in Lancaster, CA

4 insulation companies registered in Lancaster 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 Lancaster. 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.Advanced Conservation Systems Inc.

    ✓ CSLB License #508902 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1987
    Phone
    (661) 945-4545

  2. 2.Pace Setter Plumbing Corporation

    ✓ CSLB License #544777 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1988
    Phone
    (661) 948-2448

  3. 3.Evaluation & Remediation Services

    ✓ CSLB License #807968 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2002
    Phone
    (661) 723-5416

  4. 4.Diamond Star Insulation

    ✓ CSLB License #1100974 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2023
    Phone
    (661) 478-2951

Compare the top 4 at a glance

CompanyLicenseWorkers' compLicensed since
Advanced Conservation Systems Inc.#508902On file1987
Pace Setter Plumbing Corporation#544777On file1988
Evaluation & Remediation Services#807968Exempt or none on file2002
Diamond Star Insulation#1100974On 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, 4 of them registered in Lancaster. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Lancaster license has been held 24 years, and the longest-standing one dates to 1987. 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: 3 of Lancaster's 4 licenses (75.0%) 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 Lancaster: common questions

How many licensed insulation contractors are there in Lancaster?

4 active C-2 insulation and acoustical licenses are registered in Lancaster, out of 133 across Los Angeles County. 4 Lancaster-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 Lancaster and 133 across Los Angeles County, the longest-standing issued in 1987. 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 3 of Lancaster's 4 currently carry. 10 Los Angeles County licenses expire within 90 days.

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