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Best Licensed Insulation Contractors in Walnut Creek, CA

5 insulation companies registered in Walnut Creek hold current CSLB licenses, verified against official records as of August 17, 2026. All 5 are listed below, ordered by years licensed.

How we chose: We identified 5 companies registered in Walnut Creek. 5 passed license verification. All 5 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.Eco Performance Builders Inc.

    ✓ CSLB License #944856 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2010
    Phone
    (925) 363-4498

  2. 2.Nor - Cal Acoustics

    ✓ CSLB License #998459 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2014
    Phone
    (925) 997-2450

  3. 3.Attic Solutions Inc.

    ✓ CSLB License #1036391 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2018
    Phone
    (510) 290-6945

  4. 4.Dvoskin Alon

    ✓ CSLB License #1101431 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2023
    Phone
    (510) 224-0277

  5. 5.Precise Builders & Restoration

    ✓ CSLB License #1111816 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2023
    Phone
    (929) 330-6310

Compare the top 5 at a glance

CompanyLicenseWorkers' compLicensed since
Eco Performance Builders Inc.#944856On file2010
Nor - Cal Acoustics#998459Exempt or none on file2014
Attic Solutions Inc.#1036391On file2018
Dvoskin Alon#1101431Exempt or none on file2023
Precise Builders & Restoration#1111816Exempt or none on file2023

Contra Costa County insulation licensure at a glance

California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 42 active C-2 insulation and acoustical licenses in Contra Costa County, 6 of them registered in Walnut Creek. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Walnut Creek license has been held 3 years, and the longest-standing one dates to 2010. 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 Walnut Creek's 6 licenses (33.3%) carry a current policy in CSLB's file, and we do not rank on it. The contractor bond is not a signal here: 42 of the county's 42 licenses carry the same $25,000 bond California sets by statute. 2 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 Walnut Creek: common questions

How many licensed insulation contractors are there in Walnut Creek?

6 active C-2 insulation and acoustical licenses are registered in Walnut Creek, out of 42 across Contra Costa County. 5 Walnut Creek-registered companies passed our license verification, and all 5 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. 6 active C-2 insulation and acoustical licenses are registered in Walnut Creek and 42 across Contra Costa County, the longest-standing issued in 2010. 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 Walnut Creek's 6 currently carry. 2 Contra Costa County licenses expire within 90 days.

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