Know How Plumbing
Know How Plumbing operating as a sole owner is licensed in California under CSLB number 1052689. The license was first issued in 2019, putting the business at 7 years on the active CSLB roster. It carries a single CSLB classification: C-36 — Plumbing Contractor. Records show an active surety bond on file with Jet Insurance Company and an exempt workers' compensation status (no employees on payroll). The business is based in Upland, in San Bernardino County, California.
- License Number
- 1052689
- Issued
- Apr 22, 2019
- Status
- CLEAR
- Expires
- Apr 30, 2027
- Entity
- Sole Owner
- Surety
- Jet Insurance Company
- Bond Number
- JT030102
- Effective
- Mar 31, 2026
- Status
- Active
- Coverage
- Exempt
- Carrier
- —
- Policy Number
- —
- Effective
- Mar 28, 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 Know How Plumbing licensed in California?
Yes. Know How Plumbing holds California Contractors State License Board license number 1052689. The license was first issued on April 22, 2019. It is valid through April 30, 2027.
What does Know How Plumbing specialize in?
Know How Plumbing is licensed for one CSLB classification: C-36 Plumbing Contractor.
Where is Know How Plumbing headquartered?
Know How Plumbing is headquartered at 905 Sycamore Ct Unit C, Upland, CA 91786, in San Bernardino County, California.
Does Know How Plumbing have an active surety bond on file with CSLB?
Yes. Know How Plumbing has an active California contractor surety bond filed with Jet Insurance Company.
Does Know How Plumbing carry workers' compensation coverage?
Know How Plumbing reports an exempt workers' compensation status, meaning the business has no employees on payroll.
How do I verify Know How Plumbing's contractor license?
You can verify Know How Plumbing's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=1052689.
- License issuedApr 22, 2019
- WC coverage startsMar 28, 2026
- Bond activeMar 31, 2026
- License expiresApr 30, 2027
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