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California contractor license

Artemis Building Co

Artemis Building Co of Walnut Creek holds California license 1039825 (B General Building, C10 Electrical, C33 Painting and Decorating, C39 Roofing). The CSLB file dated Oct 30, 2026 lists it as active.1 It expires Jun 30, 2027.

Active

Artemis Building Co, Walnut Creek

License
1039825
Class
B General Building; C10 Electrical; C33 Painting and Decorating; C39 Roofing
Expires
Jun 30, 2027
Bond
$25,000
Workers' comp
Insured to Feb 7, 2027

CSLB file dated Oct 30, 2026

From the CSLB file dated Oct 30, 2026. Not a consumer report; check the board before you hire.

Has the board taken action on this license?

None in the CSLB file dated Oct 30, 2026. Confirm with the board: CSLB license check

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

Bond
$25,000Nationwide Mutual Insurance Company, from Aug 14, 2026, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredEndurance Assurance Corporation, from Feb 7, 2025, to Feb 7, 2027

Who is on this license?

Officer
Helen J. KeiSince Dec 17, 2025
Responsible managing officer
Ricardo LopezSince May 25, 2018
CEO and president
Manuel G. LopezSince Jun 28, 2023

What work does this license cover?

Issued May 25, 2018. Reissued Jun 28, 2023.

Which other Walnut Creek businesses hold B General Building?

California electrical contractorsGeneral Contractors in Walnut CreekCalifornia general contractors

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 on file 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 30, 2026)
  2. Contractors State License Board (CSLB)