How many plumbing contractors are in LOS ALTOS, CA?

6 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 LOS ALTOS, CA

6 listings

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

There are 6 plumbing contractors in LOS ALTOS, California with a current state license as of 2026-08-31. The earliest license expiry among them is 2027-10-31; 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
APPLIED HEAT MECHANICAL SYSTEMS	1092603	C-4	2028-06-30	LOS ALTOS	94022	Set up workspace
ARCUNE PLUMBING LLC	779298	C-36	2028-03-31	LOS ALTOS	94022	Set up workspace
LEE KRATZER PLUMBING	829614	C-36	2027-12-31	LOS ALTOS	94023	Set up workspace
MCLENNAN CONSTRUCTION	572745	B, C-36	2027-10-31	LOS ALTOS	94022	Set up workspace
SCHUES HEATING/AIR CONDITIONING	538155	C-36	2028-08-31	LOS ALTOS	94024	Set up workspace
T A SLACK PLUMBING CO	247392	C-36	2027-12-31	LOS ALTOS	94022	Set up workspace

Quick answers

How many plumbing contractors are in LOS ALTOS?: 6 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.