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California contractor license

R L Ziegenbein Construction Inc

R L Ziegenbein Construction Inc of Alamo holds California license 322200 (B General Building). The CSLB file dated Nov 1, 2026 lists it as active.1 It expires Apr 30, 2028.

Licensed 50 years, longer than 98% of 53 active Alamo general contractors.

Active

R L Ziegenbein Construction Inc, Alamo

  • Workers' comp has a cancellation date on file: Oct 31, 2026.
License
322200
Class
B General Building
Expires
Apr 30, 2028
Bond
$25,000
Workers' comp
Insured to Sep 14, 2027

CSLB file dated Nov 1, 2026

From the CSLB file dated Nov 1, 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 Nov 1, 2026. Confirm with the board: CSLB license check

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

Bond
$25,000American Contractors Indemnity Company, from Oct 20, 2025, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredState Compensation Insurance Fund, from Sep 14, 2026, to Sep 14, 2027, cancel date Oct 31, 2026

Who is on this license?

Officer
Janice M. ZiegenbeinSince Apr 7, 2010
Responsible managing officer, CEO and president
Ronald L. ZiegenbeinSince Jul 16, 1976

What work does this license cover?

Issued Jul 16, 1976. Reissued Apr 7, 2010.

A cancellation date is on file for a bond or policy. Ask for a current certificate before work starts.

Which other Alamo businesses hold B General Building?

California 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, Nov 1, 2026)
  2. Contractors State License Board (CSLB)