How many plumbing contractors are in PLYMOUTH, CA?

4 with a current California license, as of 2026-08-31.

How do I check a California contractor license is current?

Every listing shows its state license number and expiry date. Verify any of them directly against the California CSLB licensee database.

Plumbing contractors in PLYMOUTH, CA

4 listings

Source: California CSLB license records. Last verified 2026-08-31.

There are 4 plumbing contractors in PLYMOUTH, California with a current state license as of 2026-08-31. The earliest license expiry among them is 2026-11-30; every listing shows its own number and expiry date. All are drawn from the California CSLB register; expired and inactive licenses are excluded.

Business	License	Type	Expires	City	Zip
AMADOR MECHANICAL INC	501343	A, C-34, C-36, C-42	2026-11-30	PLYMOUTH	95669	Set up workspace
DON HUMPHRIES CONSTRUCTION	498943	B, C-36	2027-03-31	PLYMOUTH	95669	Set up workspace
LNC SEPTICS	1130898	C-42	2026-12-31	PLYMOUTH	95669	Set up workspace
MARK C JOHNSTON INC	724571	C-36	2028-06-30	PLYMOUTH	95669	Set up workspace

Quick answers

How many plumbing contractors are in PLYMOUTH?: 4 with a current California license, as of 2026-08-31.
How do I check a license is current?: Every listing shows its state license number and expiry. Verify any of them directly against the California CSLB licensee database.