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Best Licensed Insulation Contractors in Corona, CA

8 insulation companies registered in Corona hold current CSLB licenses, verified against official records as of August 17, 2026. All 8 are listed below, ordered by years licensed.

How we chose: We identified 8 companies registered in Corona. 8 passed license verification. All 8 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.Couts Heating & Cooling Inc.

    ✓ CSLB License #375584 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1979
    Phone
    (951) 287-5560

  2. 2.A Q H I Inc.

    ✓ CSLB License #715954 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1995
    Phone
    (909) 989-3444

  3. 3.Excel Acoustics Inc.

    ✓ CSLB License #724511 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1996
    Phone
    (951) 371-5500

  4. 4.S & S Commercial Environmental Services Inc.

    ✓ CSLB License #738979 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1997
    Phone
    (714) 337-4323

  5. 5.West Coast Insulation

    ✓ CSLB License #774147 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2000
    Phone
    (714) 357-7815

  6. 6.Preferred Insulation Contractors Inc.

    ✓ CSLB License #824373 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2003
    Phone
    (951) 735-3725

  7. 7.Premier Acoustics Inc.

    ✓ CSLB License #949939 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2010
    Phone
    (951) 277-3547

  8. 8.Resto Bros Plumbing & Restoration

    ✓ CSLB License #1097850 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2022
    Phone
    (909) 727-4302

Compare the top 6 at a glance

CompanyLicenseWorkers' compLicensed since
Couts Heating & Cooling Inc.#375584On file1979
A Q H I Inc.#715954On file1995
Excel Acoustics Inc.#724511On file1996
S & S Commercial Environmental Services Inc.#738979Exempt or none on file1997
West Coast Insulation#774147Exempt or none on file2000
Preferred Insulation Contractors Inc.#824373On file2003

Riverside County insulation licensure at a glance

California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 69 active C-2 insulation and acoustical licenses in Riverside County, 9 of them registered in Corona. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Corona license has been held 26 years, and the longest-standing one dates to 1979. 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: 6 of Corona's 9 licenses (66.7%) carry a current policy in CSLB's file, and we do not rank on it. The contractor bond is not a signal here: 69 of the county's 69 licenses carry the same $25,000 bond California sets by statute. 4 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 Corona: common questions

How many licensed insulation contractors are there in Corona?

9 active C-2 insulation and acoustical licenses are registered in Corona, out of 69 across Riverside County. 8 Corona-registered companies passed our license verification, and all 8 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. 9 active C-2 insulation and acoustical licenses are registered in Corona and 69 across Riverside County, the longest-standing issued in 1979. 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 6 of Corona's 9 currently carry. 4 Riverside County licenses expire within 90 days.

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