Zip Frank, B General Building Contractor in San Francisco, CA
Zip Frank operating as a sole owner holds an active California contractor license (CSLB #524339), valid through Feb 29, 2028. First issued in 1988, the license has been on the CSLB roster for 38 years. It carries a single CSLB classification: B — General Building Contractor. Records show an active surety bond on file with Merchants Bonding Company (mutual) and an exempt workers' compensation status (no employees on payroll). The business is based in San Francisco, in San Francisco County, California.
- License Number
- 524339
- Issued
- Feb 10, 1988
- Status
- CLEAR
- Expires
- Feb 29, 2028
- Entity
- Sole Owner
- Surety
- Merchants Bonding Company (mutual)
- Bond Number
- 101736483
- Effective
- Jan 27, 2026
- Status
- Active
- Coverage
- Exempt
- Carrier
- —
- Policy Number
- —
- Effective
- Jan 29, 2026
- Expires
- —
This contractor warrants a closer look before contracting:
- Workers' comp listed as exempt
An automated summary of public CSLB data, not a credit score, rating, or endorsement. How we determine this
Is Zip Frank licensed in California?
Yes. Zip Frank holds California Contractors State License Board license number 524339, which is active and in good standing. The license was first issued on February 10, 1988. It is valid through February 29, 2028.
What does Zip Frank specialize in?
Zip Frank is licensed for one CSLB classification: B General Building Contractor.
Where is Zip Frank headquartered?
Zip Frank is headquartered at 262 Gates St, San Francisco, CA 94110, in San Francisco County, California.
Does Zip Frank have an active surety bond on file with CSLB?
Yes. Zip Frank has an active California contractor surety bond filed with Merchants Bonding Company (mutual).
Does Zip Frank carry workers' compensation coverage?
Zip Frank reports an exempt workers' compensation status, meaning the business has no employees on payroll.
How do I verify Zip Frank's contractor license?
You can verify Zip Frank's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=524339.
- License issuedFeb 10, 1988
- Bond activeJan 27, 2026
- WC coverage startsJan 29, 2026
- License expiresFeb 29, 2028
- Rainbow Waterproofing & Restoration CO#148753San Francisco·A General Engineering Contractor
- Herrero Builders Incorporated#152980San Francisco·B General Building Contractor
- Merlo Lewis M INC#184527San Francisco·A General Engineering Contractor
- Sierra Electric CO#184594San Francisco·B General Building Contractor
- Rossi Builders INC#229568San Francisco·B General Building Contractor
- Nibbi Bros INC#232019San Francisco·A General Engineering Contractor
- Brennan John Company INC#233608San Francisco·B General Building Contractor
- Molloy Construction Company#244274San Francisco·B General Building Contractor
Working a California job with Zip Frank, or chasing an unpaid invoice? These free tools track your mechanics lien deadlines and rights under California Civil Code §§8200–8848.
- California preliminary notice deadline calculatorFind your 20-day deadline and the lien rights at risk.
- Do I need a preliminary notice in California?Answer a few questions to see if the 20-day notice applies.
- Did I lose my California lien rights?Check whether your mechanics lien window has passed.
- Unpaid construction invoice in CaliforniaYour options and deadlines for collecting on a California job.
Own Zip Frank? Claim or correct this profile