Plumbing contractor (C-36) in Upland, CA

There are 4 Plumbing contractor (C-36) licenses with an address of record in Upland, CA, in the CSLB License Master data checked Oct 27, 2026. That is 0.2% of the 2,617 such licenses statewide; Upland ranks #201 of 514 CA cities for this license type. They are spread across 2 ZIP codes; the most common are 91786 (3), 91785 (1). Most list San Bernardino County. By business type: Corporation 2, Sole Owner 2. The median first-issue year is 2018; the oldest license dates from 2015. 4 of them come up for renewal or expiration in the next 12 months, so re-check status before you sign a contract.

What a Plumbing contractor (C-36) license covers

Plumbing (C-36) covers systems that supply safe water and remove liquid and water-borne waste, including water heaters, fixtures, gas piping, drain lines and backflow devices.

How to verify a license

Enter the license number in CSLB Instant License Check and confirm the status is active, the classification matches the work, and the contractor has a current bond and workers' compensation coverage (or a valid exemption). California requires the license number on contracts and advertising. Official lookup: CSLB Instant License Check.

Plumbing contractor (C-36) licenses in Upland

Showing 4 of 4, A to Z. Listing order is alphabetical, not a recommendation.