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State files updated Oct 28, 2026
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California contractor license

Rubecon Builders Inc

Rubecon Builders Inc of San Francisco holds California license 734031 (A General Engineering, B General Building, C5 Framing and Rough Carpentry, C6 Cabinet, Millwork and Finish Carpentry, C8 Concrete, C9 Drywall, C10 Electrical). The CSLB file dated Oct 28, 2026 lists it as active.1 It expires Mar 31, 2027.

Doing business as Rubecon General Contracting Inc.

Licensed 29 years, longer than 82% of 326 active San Francisco electrical contractors.

Active

Rubecon Builders Inc, San Francisco

License
734031
Class
A General Engineering; B General Building; C5 Framing and Rough Carpentry; C6 Cabinet, Millwork and Finish Carpentry; C8 Concrete; C9 Drywall; C10 Electrical
Expires
Mar 31, 2027
Bond
$25,000
Workers' comp
Insured to Aug 6, 2027

CSLB file dated Oct 28, 2026

From the CSLB file dated Oct 28, 2026. Not a consumer report; check the board before you hire.

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

Bond
$25,000Hartford Fire Insurance Company, from Jan 1, 2023, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredSentinel Insurance Company LTD, from Aug 6, 2026, to Aug 6, 2027

What work does this license cover?

Issued Mar 21, 1997.

Which other San Francisco businesses hold A General Engineering?

Electrical Contractors in San FranciscoCalifornia electrical contractorsGeneral Contractors in San FranciscoCalifornia 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 28, 2026)
  2. Contractors State License Board (CSLB)