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Licensed Plumbers in Monrovia, California

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

  • 30licensed plumbers
  • 29active (Clear)
  • 3.3%with a suspension
  • 56.7%workers' comp exempt
  • 15.3 yrsmedian time licensed
  • 40%corp / LLC / partnership (60% sole owner)
  • 2new in the last 12 months
  • —change tracking began November 1, 2026

There are 30 plumbers based in Monrovia in CSLB's current file. 29 (96.7%) have a Clear status as of November 1, 2026.

The share with a suspension, 3.3%, is 1.3 points lower than the Los Angeles County rate for the same license (4.6%). 56.7% report a workers' comp exemption, 5.5 points higher than the statewide figure for plumbers (51.2%), so many of these businesses say they have no employees.

Experience varies: 60% have been licensed 10+ years and 2 are new this year (median 15.3 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 Monrovia

  1. Find the business in the list below, or search all 30 Monrovia 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. Confirm it live with CSLB's Instant License Check. Statuses change between our weekly refreshes, especially workers' comp and bond suspensions.
  3. Get the bid and contract in writing with the license number on it. If the job tops $1,000 in labor and materials, a licensed plumber is required by law. See the $1,000 rule.

All 30 plumbers in Monrovia

Monrovia 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 Monrovia
Business nameLicense #StatusYearsWorkers' compBond
Air Tro Incorporated 258228 Clear 57 Insured On file
Exposito Anthony 491848 Clear 40 Exempt On file
Collins R J Plumbing CO INC 583305 Clear 36 Insured On file
Johnssons Plumbing Service 586319 Clear 36 Insured On file
Carl Maertens 601255 Clear 36 Exempt On file
Rocket Plumbing 612976 Clear 35 Exempt On file
Century Sewer Services 626528 Clear 35 Insured On file
Allen John W 641272 Clear 34 Exempt On file
S H Plumbing Heating & Air Conditioning 707018 Clear 31 Insured On file
Pipeman 740665 Clear 29 Exempt On file
Mountain Aire Services 742211 Clear 29 Insured On file
North Brother Plumbing 820529 Clear 23 Exempt On file
Hassle Free Plumbing 913828 Clear 18 Insured On file
Rudy's Plumbing 917340 Clear 18 Insured On file
M M Construction 971563 Clear 14 Exempt On file
American Pipeline Services 987779 Clear 13 Insured On file
Ripple Plumbing 1018253 Clear 10 Insured On file
Rocket Plumbing Repair 1027236 Clear 9 Exempt On file
Rapid Rhino Plumbing 1029575 Clear 9 Exempt On file
Jcr Plumbing INC 1073237 Clear 5 Insured On file
Morales Plumbing 1078761 Clear 5 Exempt On file
Gomez Plumbing Solutions 1086167 Clear 4 Exempt On file
Versatile Rooter & Plumbing 1090469 Clear 4 Exempt On file
All Systems Pros INC 1097354 Clear 4 Insured On file
Drain Great Plumbing Services 1120920 Clear 2 Exempt On file
Mjm Plumbing INC 1139628 Clear 1 Exempt On file
Asset Air & Plumbing 1142914 Clear 1 Insured On file
Sirius Plumbing INC 1151630 Clear <1 Exempt On file
Sewer King Plumbing and Rooter 1162300 Clear <1 Exempt On file
Demarco Chris 954954 Susp: contractor's bond 15 Exempt On file

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 Monrovia?

CSLB's current public file lists 30 plumbers with a Monrovia mailing address. 29 have a Clear status, and 93.3% 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?

Open the contractor's profile here to see the workers' comp type and insurer from CSLB's file. In Monrovia, 43.3% of plumbers list a policy, 56.7% claim an exemption and 0% show no current coverage. Confirm the policy with CSLB's workers' comp search before work starts. How to check workers' comp.

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