How many plumbing contractors are in ONTARIO, CA?

55 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 ONTARIO, CA

55 listings

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

There are 55 plumbing contractors in ONTARIO, California with a current state license as of 2026-08-31. The earliest license expiry among them is 2026-08-31; 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
A 2 Z PLUMBING	1047486	C-36	2026-12-31	ONTARIO	91762	Set up workspace
ACOSTA PIPELINE INC	1064810	A, C-36	2028-04-30	ONTARIO	91762	Set up workspace
AIRITE HEATING AND AIR CONDITIONING INC	232930	C-4, C-20, C-38	2026-10-31	ONTARIO	91762	Set up workspace
ALL PRO COOLING HEATING PLUMBING & ELECTRICAL	1103983	C-10, C-20, C-36	2027-04-30	ONTARIO	91761	Set up workspace
ALPHA OMEGA PLUMBING	977823	C-36	2027-11-30	ONTARIO	91762	Set up workspace
AMERICAN JETTING SERVICES INC	845651	C-36	2026-08-31	ONTARIO	91761	Set up workspace
ARANDA'S SANITATION SYSTEMS	1053122	C-42	2027-05-31	ONTARIO	91762	Set up workspace
BAUMANN WATERWORKS	1020247	C-36	2026-12-31	ONTARIO	91764	Set up workspace
BC7 CONSTRUCTION INC	1049615	B, C-36	2027-01-31	ONTARIO	91764	Set up workspace
BRIAN YAWCHING KAO	897876	B, C-10, C-20, C-36	2027-06-30	ONTARIO	91764	Set up workspace
C P CONSTRUCTION CO INC	304795	A, C-12, C-34, C-42	2027-07-31	ONTARIO	91762	Set up workspace
D M GORDER CONSTRUCTION CO	632348	B, C-36, C-54	2027-11-30	ONTARIO	91764	Set up workspace
DYLAN'S PLUMBING GROUP INC	1136831	C-36	2027-04-30	ONTARIO	91761	Set up workspace
E A PLUMBING INC	603170	C-36	2026-09-30	ONTARIO	91761	Set up workspace
ELIAS PLUMBING	1105933	C-36	2027-06-30	ONTARIO	91762	Set up workspace
FAIRCHILD PLUMBING & MECHANICAL INC	606705	A, C-16, C-36	2026-11-30	ONTARIO	91761	Set up workspace
FLOW DYNAMICS INC	858166	C-36	2028-05-31	ONTARIO	91761	Set up workspace
G & G PLUMBING	508994	C-36	2027-09-30	ONTARIO	91761	Set up workspace
GRACE ROOTER AND PLUMBING	817808	C-36	2027-03-31	ONTARIO	91762	Set up workspace
G & S REASONABLE PLUMBING / ALL TECH	764181	C-36	2026-11-30	ONTARIO	91761	Set up workspace
HIGH SPEED ROOTER AND PLUMBING INC	1017796	A, C-10, C-20, C-36, C-42	2028-08-31	ONTARIO	91762	Set up workspace
HO SOO YOO	703553	B, C-10, C-36, C-38	2027-03-31	ONTARIO	91762	Set up workspace
H SEPTIC	1149300	C-42	2028-01-31	ONTARIO	91762	Set up workspace
IN AND OUT PLUMBING	1030564	C-36	2027-08-31	ONTARIO	91761	Set up workspace
INTER-CITY ENERGY SYSTEMS INC	587709	B, C-10, C-20, C-36	2028-02-29	ONTARIO	91764	Set up workspace
JAKE SANDOVAL DBA CLEARWATER PLUMBING & CONSTRUCTION	980596	B, C-36	2027-01-31	ONTARIO	91762	Set up workspace
J M E PLUMBING INC	1083921	C-36	2027-11-30	ONTARIO	91761	Set up workspace
JN CONSTRUCTION INC	1001396	A, B, C-10, C-16, C-20, C-36	2027-02-28	ONTARIO	91762	Set up workspace
JNSD CONSTRUCTION INC	1080741	B, C-10, C-16, C-36	2027-09-30	ONTARIO	91762	Set up workspace
JOSE LUIS PALACIOS	986197	C-36	2027-08-31	ONTARIO	91761	Set up workspace
LVL UP PLUMBING INC	1146179	C-36	2028-07-31	ONTARIO	91758	Set up workspace
NELISSEN PLUMBING	1142166	C-36	2027-08-31	ONTARIO	91761	Set up workspace
NORTHSTAR PHAC INC	916254	C-20, C-36	2028-02-29	ONTARIO	91761	Set up workspace
ORANGE INDEPENDENT PLUMBING SERVICES	1005919	C-36	2027-04-30	ONTARIO	91762	Set up workspace
PISCES PLUMBING	1133446	C-36	2027-02-28	ONTARIO	91764	Set up workspace
PRO ROOTER GUYS INC	1052306	C-36	2027-04-30	ONTARIO	91762	Set up workspace
PRO TECH PLUMBING	915091	C-36, C-42	2028-04-30	ONTARIO	91762	Set up workspace
P V & C PLUMBING AND PIPING INC	529259	C-36	2028-05-31	ONTARIO	91761	Set up workspace
REED'S PLUMBING	788531	C-36	2028-09-30	ONTARIO	91761	Set up workspace
RODRIGUEZ BROTHERS ENGINEERING INC	670969	A, C-42	2027-01-31	ONTARIO	91761	Set up workspace
ROYALTY PLUMBING INC	1109464	C-36	2027-08-31	ONTARIO	91762	Set up workspace
RUVICO INC	1021363	C-36	2026-12-31	ONTARIO	91762	Set up workspace
SAFFORD PLUMBING	968088	C-36	2028-07-31	ONTARIO	91764	Set up workspace
SENOR SEPTIC CONSTRUCTION AND PUMPING INC	1048170	C-42	2026-12-31	ONTARIO	91762	Set up workspace
SENOR SEPTIC CONSTRUCTION & PUMPING	888517	C-42	2026-12-31	ONTARIO	91762	Set up workspace
SHOWTIME FAMILY PLUMBING & ROOTER INC	1151703	C-36	2028-03-31	ONTARIO	91761	Set up workspace
SM WATERWORKS BACKFLOW SERVICE	1115619	A, C-36, C-60	2028-01-31	ONTARIO	91764	Set up workspace
SPEC CONSTRUCTION CO INC	419626	A, B, C-4, C-8, C-9, C-10, C-15, C-17, C-20, C-33, C-35, C-36, C-39	2027-08-31	ONTARIO	91762	Set up workspace
SWEET WATER LANDSCAPING	817917	C-27, C-36	2027-04-30	ONTARIO	91762	Set up workspace
THE SPECIALIST PLUMBING	915935	C-36	2028-05-31	ONTARIO	91762	Set up workspace

Showing 1–50 of 55

Quick answers

How many plumbing contractors are in ONTARIO?: 55 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.