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San Bernardino County, California

Plumbing in San Bernardino County, California

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Browse 452 verified plumbing registered across San Bernardino County, California (including San Bernardino, Fontana, Rancho Cucamonga, Ontario, Victorville, Rialto). Every record is compiled from California Contractors State License Board (CA CSLB) public credential files under California Business and Professions Code Division 3, Chapter 9 (Contractors License Law: Class A, Class B General Building, and Class C Specialty Classifications with $25,000 Bond Requirement).

Official State Authority: California Contractors State License Board (CA CSLB) Official Registry · County Seat: San Bernardino

Municipalities in San Bernardino County (16)

Select a city or town in San Bernardino County to view local permit guidance and registered plumbing records:

San Bernardino 50Rancho Cucamonga 46Fontana 42Ontario 42Upland 37Yucaipa 36Apple Valley 29Hesperia 29Chino 27Redlands 23Rialto 23Chino Hills 17Victorville 17Montclair 14Highland 11Colton 9

452 plumbing records · San Bernardino County, CA

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Public Directory Quality: Official CA CSLB license records across San Bernardino County · Zero sponsored order · Never sold as a lead · How our data works →

Plumbing directory — San Bernardino County

452 matching records across 16 open municipalities · 25 on this page · Contactable records first, then alphabetical.

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Shaded areas mark approximate postal or city locations, not premises or service areas. Circle sizes are illustrative, not postal boundaries. Some records share the same area. Private addresses are excluded.

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Other Counties in California

Los Angeles CountySan Diego CountyOrange CountySanta Clara CountySan Francisco CountySacramento CountyAlameda CountyRiverside CountyContra Costa CountySan Mateo CountyVentura CountyFresno CountyKern CountySonoma CountyStanislaus CountyMonterey CountySanta Barbara CountyButte CountyShasta CountyHumboldt County

Before the first call

  • Describe the job and ask whether it is within their scope and service area.
  • Check the credential with its issuing authority and ask what applies where the work will happen.
  • Ask about insurance, availability, who will do the work, and a written scope.
  • Ask about callout fees, labor or fixed rates, materials, cancellation and any estimate charge.
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Verification Overview & Key Takeaways: How to Check Official Credentials

HomeCrafto displays source records with different scopes, including licenses, registrations, municipal permits and community records. A source entry is not proof of qualification for your job. Before signing a work order or paying a deposit, homeowners should confirm that the contractor’s credential number is active, verify that the license classification covers the specific trade scope required for the job, and request a current Certificate of Insurance (COI) directly from the issuing insurance carrier. Independent verification protects your property and ensures compliance with local building codes.

How do you verify a contractor license number and insurance on official portals (FAQ)?

You can verify active license standing and consumer protection rules directly through official government portals, including Washington L&I Contractor Verify, the California Contractors State License Board (CSLB), the Connecticut eLicense Portal, USA.gov State Consumer Protection Offices, and FTC Home Improvement Consumer Guidance. Always confirm municipal permit requirements with your local building department before work begins.