Plumbing contractor (C-36) in Oakland, CA

18 licenses · checked Oct 27, 2026

There are 18 Plumbing contractor (C-36) licenses with an address of record in Oakland, CA, in the CSLB License Master data checked Oct 27, 2026. That is 0.7% of the 2,617 such licenses statewide; Oakland ranks #23 of 514 CA cities for this license type. They are spread across 10 ZIP codes; the most common are 94603 (3), 94621 (3), 94608 (3). Most list Alameda County. By business type: Corporation 9, Sole Owner 9. The median first-issue year is 2018; the oldest license dates from 2015. 6 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 Oakland

Showing 18 of 18, A to Z. Listing order is alphabetical, not a recommendation.

Frequently asked questions

How many Plumbing contractor (C-36) licenses are in Oakland?

18 active licenses in the CSLB License Master data checked Oct 27, 2026 (0.7% of CA).

What does a Plumbing contractor (C-36) license cover?

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 do I verify a Plumbing contractor (C-36) license in Oakland?

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. Use the license number shown here with the CSLB Instant License Check.

How many Oakland Plumbing contractor (C-36) licenses expire soon?

6 of 18 have an expiration date in the next 12 months. A license that lapses must be renewed before the holder can work under it again.

Other license types in Oakland

General building contractor (109) · Electrical contractor (C-10) (24) · Painting contractor (C-33) (22) · General engineering contractor (20) · Landscaping contractor (C-27) (14) · HVAC contractor (C-20) (13) · Roofing contractor (C-39) (9) · Flooring contractor (C-15) (8) · Concrete contractor (C-8) (5) · Cabinet and finish carpentry contractor (C-6) (5) · Glazing contractor (C-17) (5) · Tile contractor (C-54) (3)

All Plumbing contractor (C-36) licenses in CA →

Source: CSLB License Master. Licensed California is independent and not affiliated with the licensing agency. Data checked Oct 27, 2026.