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State files updated Oct 27, 2026
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California contractor license

Efficient Windows LLC

Efficient Windows LLC of Buena Park holds California license 1140479 (C17 Glazing). The CSLB file dated Oct 26, 2026 lists it as active.1 It expires Jul 31, 2027.

Active

Efficient Windows LLC, Buena Park

License
1140479
Class
C17 Glazing
Expires
Jul 31, 2027
Bond
$25,000
Workers' comp
Exempt

CSLB file dated Oct 26, 2026

What bond, insurance and workers' comp are on file?

Issued Jul 15, 2025.

Bond
$25,000Nationwide Mutual Insurance Company, from Jun 25, 2025, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
Exemptfrom Jun 27, 2025

What work does this license cover?

The workers' comp exemption means the holder told the CSLB it has no employees. If a crew works on your job, ask for a workers' comp certificate.

What should you check before hiring?

What to ask before you hire

  1. Get the license number in writing. The name on the license should match the name on your contract and invoice.
  2. Check the class covers the job. A license for one trade doesn't cover another. California license classes
  3. Ask for a certificate of insurance sent to you by the insurance agent, not handed over by the contractor. How to read a COI
  4. Ask who will be on site. If a crew works on your property, ask for proof of workers' comp. An exemption means the contractor told the CSLB it has no employees.
  5. Put it in a written contract: license number, price, start date and payment schedule. Check the license again on the day you sign.

If the license is lapsed

  1. Don't sign or pay a deposit until the CSLB shows the license active again.
  2. Ask the contractor why. For a bond or insurance lapse, ask for proof that the new bond or policy was filed with the CSLB, then check again.
  3. If work has started, hold further payments, keep the contract, receipts and photos, and file a complaint with Contractors State License Board (CSLB).
  4. Check another contractor. California license lookup

Sources

  1. CSLB License Master (cslb.ca.gov, Oct 26, 2026)
  2. Contractors State License Board (CSLB)