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Licensed Plumbers in Rancho Cucamonga, California

Updated November 1, 2026 from CSLB's public license file · C-36 Plumbing Contractor

  • 71licensed plumbers
  • 68active (Clear)
  • 4.2%with a suspension
  • 36.6%workers' comp exempt
  • 9.6 yrsmedian time licensed
  • 67.6%corp / LLC / partnership (32.4% sole owner)
  • 5new in the last 12 months
  • —change tracking began November 1, 2026

There are 71 plumbers based in Rancho Cucamonga in CSLB's current file. 68 (95.8%) have a Clear status as of November 1, 2026.

36.6% report a workers' comp exemption, 14.6 points lower than the statewide figure for plumbers (51.2%), so many of these businesses say they have no employees. The share with a suspension (4.2%) is close to the San Bernardino County rate for the same license (4.4%).

Experience varies: 45.1% have been licensed 10+ years and 5 are new this year (median 9.6 years, vs 13.4 statewide).

In California this work generally calls for the C-36 Plumbing Contractor license (or a B license when it is part of a larger multi-trade job). See the C-36 Plumbing Contractor guide for what the license covers.

How to check a plumber's license in Rancho Cucamonga

  1. Find the business in the list below, or search all 71 Rancho Cucamonga listings, and open its profile. You want a Clear status and the C-36 classification (a B license can also cover it as part of a multi-trade job).
  2. Before any money changes hands, verify the license on CSLB's own lookup. Our data comes from CSLB's weekly file, so a very recent change may not show here yet.
  3. Match the license holder's name to the name on the written contract and the person you meet. Ask for proof of workers' comp if anyone besides the owner will work on site. Hiring checklist.

50 of 71 plumbers in Rancho Cucamonga

Rancho Cucamonga plumbers sorted with Clear licenses first, then by years licensed. Badges reflect CSLB's file dated November 1, 2026, not a rating of anyone's work.

Licensed plumbers in Rancho Cucamonga
Business nameLicense #StatusYearsWorkers' compBond
Dakota Backflow CO 403777 Clear 45 Insured On file
Lopiccolo Donald G 477410 Clear 41 Insured On file
Charron Dirk Plumbing 513226 Clear 39 Exempt On file
Alta Loma Plumbing 522129 Clear 38 Exempt On file
Jed August 536787 Clear 38 Insured On file
W C C S INC 655509 Clear 34 Insured On file
Mc Leod Scott Plumbing INC 678352 Clear 33 Insured On file
H E Hoist Equipment 698661 Clear 32 Exempt On file
Dunn Plumbing Heating & Air Conditioning INC 712182 Clear 31 Insured On file
Pipe Dream Rooter & Plumbing INC 768995 Clear 27 Exempt On file
Masterflow Plumbing 810730 Clear 24 Exempt On file
A C R Technologies 811487 Clear 24 Insured On file
Fossler Plumbing 842991 Clear 22 Exempt On file
Punk Rock Plumbing Services 842826 Clear 22 Insured On file
Ramco Plumbing Heating & Air 853493 Clear 21 Insured On file
Norfork Incorporated 868794 Clear 20 Insured On file
Divine Remodels and More 889498 Clear 19 Insured On file
One Stop Source 899319 Clear 19 Insured On file
Dealership Doctors INC the 905996 Clear 19 Insured On file
Superior Electrical Mechanical & Plumbing INC 911185 Clear 18 Insured On file
Maglaya Peter 922907 Clear 18 Exempt On file
All City Plumbing Air & Electrical 940722 Clear 16 Insured On file
A M J Plumbing Specialists Corp 955853 Clear 15 Insured On file
U S A Plumbing Service Incorporated 961844 Clear 15 Insured On file
Action Plumbing INC 965976 Clear 15 Insured On file
B C M Group INC 968356 Clear 14 Insured On file
Ground Werks Plumbing and Rooter 983618 Clear 13 Insured On file
Masterline Plumbing INC 990945 Clear 12 Insured On file
Phillips William David 995578 Clear 12 Exempt On file
Armour Plumbing CO 1008312 Clear 11 Insured On file
Cut N Dry Restoration 1013757 Clear 10 Insured On file
All Tankless Water Heater and Plumbing 1022579 Clear 9 None On file
Williams Rick 1023004 Clear 9 Exempt On file
Goodall Plumbing Services 1024067 Clear 9 Exempt On file
Mission Construction and Restoration 1025769 Clear 9 Insured On file
Bobbyblue Plumbing INC 1027049 Clear 9 Insured On file
Melody Plumbing CO 1038305 Clear 8 Insured On file
World Famous Plumbing 1038940 Clear 8 Insured On file
United Plumbing 1052181 Clear 7 Exempt On file
V K Plumbing 1051719 Clear 7 Exempt On file
Fallah Plumbing 1054233 Clear 7 Exempt On file
Redhill Plumbing 1054041 Clear 7 Exempt On file
Bow Tie Plumbing & Rooter 1066845 Clear 6 Insured On file
Efs Plumbing & Hydro Jetting 1069409 Clear 6 Insured On file
All Aces Backflow 1071034 Clear 6 Insured On file
W C C G INC 1080578 Clear 5 Insured On file
Installation Pro Plumbing LLC 1091801 Clear 4 Insured On file
Allison Plumbing 1094177 Clear 4 Insured On file
Fixed Plumbing INC 1099335 Clear 3 Insured On file
Stone Camarin 1101818 Clear 3 Insured On file

See all 71 plumbers in Rancho Cucamonga

Source: CSLB public data · Updated November 1, 2026 Status can change at any time. Verify on CSLB's Instant License Check.

Frequently asked questions

How many licensed plumbers are in Rancho Cucamonga?

CSLB's current public file lists 71 plumbers with a Rancho Cucamonga mailing address. 68 have a Clear status, and 91.5% show no issues at all in the file (no suspension, no pending action, bond on file, not near expiration).

What license does a plumber need in California?

In California this work generally calls for the C-36 Plumbing Contractor license (or a B license when it is part of a larger multi-trade job). Any job of $1,000 or more in labor and materials needs a licensed contractor. Read our guide to the $1,000 rule.

How do I check a plumber's workers' comp?

Each profile shows the workers' comp type, insurer and policy dates from CSLB's file. Among Rancho Cucamonga plumbers, 36.6% are exempt (no employees), 60.6% insured and 2.8% without current coverage. Verify a policy with CSLB's insurer search (step by step).

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Guides