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California contractor license

Wollmer Custom Building

Wollmer Custom Building of Santa Rosa holds California license 621659 (B General Building). The CSLB file dated Oct 31, 2026 lists it as active.1 It expires May 31, 2027.

Licensed 35 years, longer than 85% of 455 active Santa Rosa general contractors.

Active

Wollmer Custom Building, Santa Rosa

License
621659
Class
B General Building
Expires
May 31, 2027
Bond
$25,000
Workers' comp
Exempt

CSLB file dated Oct 31, 2026

From the CSLB file dated Oct 31, 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 31, 2026. Confirm with the board: CSLB license check

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

Bond
$25,000Western Surety Company, from Oct 25, 2024, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
Exemptfrom May 14, 2025

Who is on this license?

Responsible managing officer, CEO and president
Jeffrey R. WollmerSince Jun 7, 1991

What work does this license cover?

Issued Jun 7, 1991. Inactive Jul 1, 1993 to Jul 1, 1997. Reissued May 15, 2007.

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.

Which other Santa Rosa businesses hold B General Building?

General Contractors in Santa RosaCalifornia 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 31, 2026)
  2. Contractors State License Board (CSLB)