Calplumbing CO, C-36 Plumbing Contractor in San Francisco, CA
Calplumbing CO operating as a sole owner holds an active California contractor license (CSLB #632743), valid through Dec 31, 2027. First issued in 1991, the license has been on the CSLB roster for 35 years. It carries a single CSLB classification: C-36 — Plumbing Contractor. Records show an active surety bond on file with Hudson Insurance Company and an exempt workers' compensation status (no employees on payroll). The business is based in San Francisco, in San Francisco County, California.
- License Number
- 632743
- Issued
- Dec 6, 1991
- Status
- CLEAR
- Expires
- Dec 31, 2027
- Entity
- Sole Owner
- Surety
- Hudson Insurance Company
- Bond Number
- 30127209
- Effective
- Oct 5, 2023
- Status
- Active
- Coverage
- Exempt
- Carrier
- —
- Policy Number
- —
- Effective
- Dec 8, 2025
- 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 Calplumbing CO licensed in California?
Yes. Calplumbing CO holds California Contractors State License Board license number 632743, which is active and in good standing. The license was first issued on December 6, 1991. It is valid through December 31, 2027.
What does Calplumbing CO specialize in?
Calplumbing CO is licensed for one CSLB classification: C-36 Plumbing Contractor.
Where is Calplumbing CO headquartered?
Calplumbing CO is headquartered at P O Box 31042, San Francisco, CA 94131, in San Francisco County, California.
Does Calplumbing CO have an active surety bond on file with CSLB?
Yes. Calplumbing CO has an active California contractor surety bond filed with Hudson Insurance Company.
Does Calplumbing CO carry workers' compensation coverage?
Calplumbing CO reports an exempt workers' compensation status, meaning the business has no employees on payroll.
How do I verify Calplumbing CO's contractor license?
You can verify Calplumbing CO's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=632743.
- License issuedDec 6, 1991
- Bond activeOct 5, 2023
- WC coverage startsDec 8, 2025
- License expiresDec 31, 2027
- Mirkovich R & Sons INC#603529San Francisco·C-36 Plumbing Contractor
- Lei's Construction Company#593386San Francisco·B General Building Contractor
- Bana Construction INC#612160San Francisco·B General Building Contractor
- Budget Blinds of San Francisco North#613539San Francisco·B General Building Contractor
- Chen's Electrical CO#613443San Francisco·C-10 Electrical Contractor
- Master Plumbing#573292San Francisco·C-36 Plumbing Contractor
- Plumbarius#559115San Francisco·C-16 Fire Protection Contractor
- Cahalan Mike#582766San Francisco·B General Building Contractor
Working a California job with Calplumbing CO, 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 Calplumbing CO? Claim or correct this profile