Efficient Water Heaters, Inc.

San Jose • Santa Clara County

Water Heater Services in San Jose, CA

Installation, repair, and replacement of tank, tankless, and heat-pump water heaters across San Jose — Licensed CSLB #1008381 • San Jose Development Services permits routine

Efficient Water Heaters is a CSLB-licensed water heater specialist serving every San Jose neighborhood — from 1920s Willow Glen craftsman bungalows with half-inch black-iron gas mains, to Almaden Valley 80-gallon retrofits, to North San Jose tankless conversions for multi-bath households. Owner Joseph Castro pulls City of San Jose permits routinely and his crew installs or repairs 15+ water heaters per week across the 95110–95148 ZIP footprint.

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San Jose water heater services

Water Heater Installation

Tank, tankless, and heat-pump installs throughout San Jose — permits pulled, CPC 507.2 compliant.

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Water Heater Repair

Same-day diagnosis and repair across San Jose ZIPs 95110, 95112, 95116, 95118, 95120, 95124, 95125, 95126, 95128, 95129, 95131, 95135, 95148.

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Best Water Heater Company

How to choose a licensed, bonded, San Jose-specialist water heater contractor.

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Serving every San Jose neighborhood

San Jose's mix of 1920s Rose Garden Tudors, 1950s Cambrian ranches, 1970s Evergreen tract homes, and modern Santana Row condos means no two water heater jobs look alike. Pre-1970 homes almost always need gas-line upsizing for 199K BTU tankless units. Heat-pump installs in Almaden garages need ambient-air clearance calculations. Commercial work along The Alameda and downtown serves restaurants and multi-family.

Neighborhoods covered:

Willow Glen • Almaden Valley • Rose Garden • Cambrian Park • Berryessa • Evergreen • Alum Rock • Santana Row • Downtown • North San Jose

ZIP codes:

95110 • 95112 • 95116 • 95118 • 95120 • 95124 • 95125 • 95126 • 95128 • 95129 • 95131 • 95135 • 95148

Why San Jose homeowners hire Efficient Water Heaters

  • Licensed CSLB C-36 #1008381 (verifiable on cslb.ca.gov)
  • San Jose Development Services permits pulled routinely
  • Navien, Rinnai, Noritz, Bradford White, Rheem certified
  • BAAQMD Rule 9-6 / 2027 zero-NOx compliance planning
  • Owner Joseph Castro on-call — not a call center
  • 4.8★ on 328+ Google reviews

Frequently asked questions

Most San Jose installs are scheduled within 24–48 hours. Joseph confirms sizing and permit scope on the phone, pulls the San Jose Development Services plumbing permit, and the crew completes a like-for-like 40–50 gallon tank install in 3–4 hours including CPC 507.2 seismic strapping, expansion tank, T&P discharge, and inspection-ready work. Tankless conversions in older Willow Glen or Rose Garden homes add gas-line upsizing time.

Need Hot Water Back Today?

Call or request a phone estimate. A San Jose water-heater specialist will review your situation and help you decide whether repair, replacement, tankless, or heat-pump service makes sense.

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  • Licensed CSLB #1008381
  • Bonded & Insured
  • Open 24/7

Navien Service Specialist · Rinnai PRO · Noritz Certified