Efficient Water Heaters, Inc.

Cupertino • Santa Clara County

Water Heater Services in Cupertino, CA

Installation, repair, and replacement of tank, tankless, and heat-pump water heaters across Cupertino — Licensed CSLB #1008381 • City of Cupertino Building Division permits routine

Efficient Water Heaters serves all of Cupertino — from 1950s Monta Vista ranches with half-inch black-iron gas mains, to Rancho Rinconada townhomes with shared mechanical closets, to the modern Apple-Park-area builds wanting Navien tankless or Rheem ProTerra heat-pump installs. CSLB-licensed, City of Cupertino Building Division permits pulled routinely, and a single 95014 ZIP means our trucks know every street.

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Cupertino water heater services

Water Heater Installation

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

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Water Heater Repair

Same-day diagnosis and repair across Cupertino ZIPs 95014.

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Best Water Heater Company

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

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Serving every Cupertino neighborhood

Cupertino is dense and well-defined — one ZIP (95014), distinct neighborhoods, and a housing stock split between mid-century ranch homes (Monta Vista, Garden Gate) and 1970s–2000s townhomes (Rancho Rinconada, Seven Springs). Monta Vista's half-inch gas mains almost always need upsizing for 199K BTU tankless. Rancho Rinconada heat-pump installs require ambient-air calculations. Commercial work serves restaurants near Apple Park, Cupertino Village, and Vallco-area retail.

Neighborhoods covered:

Monta Vista • Rancho Rinconada • Garden Gate • Seven Springs • Inspiration Heights • Linda Vista • Oak Valley • Apple Park area

ZIP codes:

95014

Why Cupertino homeowners hire Efficient Water Heaters

  • Licensed CSLB C-36 #1008381 (verifiable on cslb.ca.gov)
  • City of Cupertino Building Division 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 Cupertino installs are scheduled within 24–48 hours. We pull the City of Cupertino Building Division plumbing permit; a like-for-like 40–50 gallon tank takes 3–4 hours including CPC 507.2 seismic strapping, expansion tank, T&P discharge, and inspection-ready work. Monta Vista tankless conversions add gas-line upsizing.

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.

Call (408) 470-0191 Get Phone Estimate
  • Licensed CSLB #1008381
  • Bonded & Insured
  • Open 24/7

Navien Service Specialist · Rinnai PRO · Noritz Certified