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Best Licensed Solar Contractors in San Mateo, CA

4 solar companies registered in San Mateo hold current CSLB licenses, verified against official records as of August 17, 2026. All 4 are listed below, ordered by workers' compensation cover and years licensed.

How we chose: We identified 4 companies registered in San Mateo. 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.Cal - Pac Roofing Of San Mateo

    ✓ CSLB License #735061 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1997
    Phone
    (650) 286-0450

  2. 2.Opus Pacific Development Inc.

    ✓ CSLB License #801858 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2001
    Phone
    (650) 788-5368

  3. 3.H M W Development Inc.

    ✓ CSLB License #822005 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2003
    Phone
    (415) 806-8992

  4. 4.Air Temp Company

    ✓ CSLB License #889684 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2007
    Phone
    (650) 591-1004

Compare the top 4 at a glance

CompanyLicenseWorkers' compLicensed since
Cal - Pac Roofing Of San Mateo#735061On file1997
Opus Pacific Development Inc.#801858On file2001
H M W Development Inc.#822005On file2003
Air Temp Company#889684On file2007

San Mateo County solar licensure at a glance

California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 12 active C-46 solar licenses in San Mateo County, 4 of them registered in San Mateo. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median San Mateo license has been held 23 years, and the longest-standing one dates to 1997. 4 of San Mateo's 4 licenses (100.0%) carry current workers' compensation cover in CSLB's file. That is employee injury cover, not liability insurance, and a blank usually means an owner-operator with no employees - lawful, and not a mark against anyone. The contractor bond is not a signal here: 12 of the county's 12 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.

Solar Contractors in San Mateo: common questions

How many licensed solar contractors are there in San Mateo?

4 active C-46 solar licenses are registered in San Mateo, out of 12 across San Mateo County. 4 San Mateo-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 solar contractors?

Yes. California licenses contractors by classification, and C-46 is the CSLB classification that authorises this work. 4 active C-46 solar licenses are registered in San Mateo and 12 across San Mateo County, the longest-standing issued in 1997. Only CLEAR, unexpired licenses appear here.

How do I check a solar 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 4 of San Mateo's 4 currently carry. 0 San Mateo County licenses expire within 90 days.

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