Water Heater Service in Palo Alto
Water Heater Repair and Replacement in Palo Alto, CA
Tank, tankless and heat pump water heater repair and replacement for Palo Alto homeowners, from our shop in San Jose. This page covers what's local: the City's instant and over-the-counter permits, what the application and inspection need, CPAU's gas and soft water, the City's electric readiness rules, the Air District's zero-NOx rule and CPAU's heat pump water heater rebate.
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Water Heater Services for Palo Alto Homes
- Water heater repair and replacementNo hot water, leaks, noise
- Gas water heatersRepair and like-for-like replacement
- Tankless water heatersRepair, descaling, installation
- Heat pump water heatersEfficient electric hot water
- Leak detectionLeaks around the heater or lines
- Gas line servicesSupply lines and shutoff valves
Water Heaters in Palo Alto: What's Different
In Palo Alto the City is both the building department and the gas, water and electric utility, so a water heater job runs through City Hall from permit to rebate.
Instant permit for a same-spot tank
The City's 2026 checklist says a water heater permit can be an Instant Permit when the new unit goes in the same place, isn't tankless and doesn't draw more gas (BTUs) than the old one.
Over-the-counter for the rest
Other standalone water heater jobs can use the Over-the-Counter MEP Permit Pilot: a coordinator checks the pre-application within a business day, and the permit can be issued at a one-hour appointment.
The City supplies the gas
Palo Alto's gas comes from City of Palo Alto Utilities, not PG&E. A tankless unit that raises gas demand needs a Utilities Application with the permit, and the plans may need an isometric gas riser diagram.
Soft Hetch Hetchy water
CPAU's 2025 water quality report shows hardness from 8.1 to 112 ppm, averaging 62 ppm, much softer than the well water in many South Bay cities. Tanks still collect some sediment.
CPAU rebate, reserved first
CPAU's Rebate Hub pays toward a NEEA Tier 3 heat pump water heater, with an add-on toward the permit fee. Reserve before the work starts; the final claim needs proof of permit inspection.
Zero-NOx date set by the Air District
Rule 9-6 sets a zero-NOx standard for home gas water heaters manufactured after January 1, 2027. The Air District Board votes on November 4, 2026 on moving that to January 1, 2028.
A Homeowner’s Guide to Water Heater Repair and Replacement in Palo Alto
Three ways to permit a water heater
Palo Alto’s Development Services takes every application through Accela Citizen Access (ACA). Which route a water heater takes depends on the job:
- Instant Permit: a replacement in the same location that isn’t tankless and doesn’t have a higher gas demand (BTUs) than the old one.
- Over-the-Counter MEP Permit Pilot: for standalone plumbing permits at single-family homes and individual units. Submit a pre-application; a project coordinator checks it within one business day and books a one-hour appointment, virtual or in person, and an approved permit is issued that day.
- Express or standard review: about two weeks or 30 days, for projects outside the pilot.
Building project coordinators answer at (650) 329-2496, option 1. See water heater repair and replacement.
What the application and inspection need
The City’s Residential Water Heater Replacement checklist, written to the 2025 California codes, lists:
- a plan showing the scope of work, a floor plan, the existing and proposed heater location, the gas demand in BTUs and any vehicle protection;
- an isometric gas riser diagram for the whole system if gas demand goes up;
- the maker’s installation instructions and specifications;
- Title 24 prescriptive energy forms for water heating;
- a residential load calculation if electrical load is added, as with many heat pump units;
- a CPAU Utilities Application only when a tankless unit raises gas demand.
Book the final (inspection 503) at (650) 329-2496, option 2, with the approved plans, permit card and installation instructions on site. State law also requires every replacement water heater to be strapped against earthquakes (Health and Safety Code § 19211), and the California Plumbing Code calls for an expansion tank wherever a check valve or backflow device closes the system.
Soft water from Hetch Hetchy
Palo Alto buys its water from the San Francisco Regional Water System. CPAU’s 2025 water quality report lists hardness from 8.1 to 112 ppm, averaging 62 ppm, as calcium carbonate. That’s soft to moderately hard, so tanks and tankless heat exchangers scale more slowly here than on South Bay well water. Yearly tank flushing still clears sediment, and a tankless unit should be descaled on the maker’s schedule. See tankless water heaters. Compare other cities in our South Bay water hardness table.
Gas, electric readiness and Rule 9-6
CPAU supplies Palo Alto’s natural gas as well as its electricity and water. Two sets of rules apply to a gas water heater:
- City code: the City Council suspended enforcement of its heat pump water heater replacement requirement on February 26, 2024. Residential addition and alteration projects that replace or add a gas appliance must still meet electric readiness requirements, such as pre-wiring for a future electric appliance. A proposed 2026–2028 update would require a heat pump water heater (or solar thermal with gas) at gas replacement starting in 2027; the City’s page still lists it as a proposal.
- Air District Rule 9-6: gas water heaters of 75,000 BTU/hr or less manufactured after January 1, 2027 must emit zero NOx; larger units, tankless included, follow on January 1, 2031. On November 4, 2026 the Board votes on moving those dates to 2028 and 2033 and adding exemptions. A working heater can stay. See the zero-NOx rules.
CPAU’s heat pump water heater programs
CPAU offers two paths when a heat pump water heater replaces gas or electric resistance:
- Your own contractor and the Rebate Hub: for residents with active CPAU electric and gas service. Reserve first; a reservation holds funds for 120 days, the heater must meet NEEA Tier 3 or higher, and the final application with proof of permit inspection is due within 90 days of the final inspection. Add-ons cover wiring and the permit fee.
- Electrify My Home: a City-managed service, (650) 713-3411, that handles permits, installer and rebates, including emergency replacements.
We install qualifying units, pull the permit and give you the invoice, model numbers and photos the Rebate Hub asks for. Details: Palo Alto Utilities rebates and heat pump water heater installation.
Sources
City of Palo Alto, Development Services: Over-the-Counter Residential MEP Permit Pilot Program · Residential Water Heater Replacement checklist (2026) · Green Building Code Requirements · Proposed 2026–2028 Green Building and Local Energy Code Update. City of Palo Alto Utilities: 2025 water quality report · Switch to a Heat Pump Water Heater · Rebate Hub · Contact Utilities. State of California: Health and Safety Code § 19211 · 2025 California Plumbing Code. Bay Area Air District: Rules 9-4 and 9-6 Building Appliances · Building Appliances Rule Implementation. Checked October 2026.
Water Heater Prices in Palo Alto
Most repairs are quoted as a fixed price before we start, so you approve the cost before any work begins. These are typical prices for common jobs in our service area.
| Service | Typical price (USD) |
|---|---|
| Tank water heater | $1,200–$2,000+ |
| Gas water heater | $1,500–$4,500+ |
| Electric water heater | $1,600–$4,000+ |
| Tankless water heater | $1,800–$6,000+ |
| Heat pump water heater | $2,500–$6,000+ |
| Inspection feeWaived for service plan members | $59 |
Prices are installed, before any current special, and depend on access, materials and what we find.
In Palo Alto, a same-spot tank swap with no added gas demand can go on an Instant Permit. A tankless conversion or a larger gas unit needs plans with the gas demand, possibly an isometric gas riser diagram and a CPAU Utilities Application, and a heat pump unit that adds electrical load needs a residential load calculation.
Get a free estimate →Antonio did an excellent job fixing the water heater room noise issue. He took the time to properly diagnose the root cause instead of just treating the symptoms, which I really appreciated.
He went through multiple steps to resolve it, including draining and cleaning the water heater and adding vibration pads between the water pipes and the wall to reduce the noise transmission.
He was professional, thorough, and clearly knows what he’s doing. Highly recommend Antonio if you’re dealing with similar issues.
Nina F.Google review
We had a water service line leak. Danny the technician arrived on time and explained everything to us clearly. He is nice, knowledgeable and professional. He finished the job by himself perfectly and the area was left clean. We would definitely request this technician again when we contact CPI Service in the future.
Thu L.Google review
We hired CPI for a complete house repipe and an addition of a water recirculation system. They did an excellent job. The workers were friendly, they cleaned up after themselves, they didn’t hesitate to ask if they had any questions and we were assigned a project manager to ensure that the job went smoothly. They handled permits and inspections very well. Everything went smoothly. They were definitely worth the money. I wish all of our home improvement jobs had gone this well. I definitely recommend them.
Tanja F.Yelp review
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Water Heater Service in Palo Alto FAQs
Do I need a permit to replace a water heater in Palo Alto?
Yes. Permits go through the City's Accela Citizen Access portal. The City's 2026 submittal checklist says a replacement qualifies as an Instant Permit when it stays in the same location, isn't tankless and doesn't increase gas demand. Other standalone water heater jobs can use the Over-the-Counter MEP Permit Pilot, where an approved permit is issued at a one-hour appointment, or the regular express (two-week) or standard (30-day) review. See water heater repair and replacement.
What does Palo Alto's water heater permit application need?
The City's Residential Water Heater Replacement checklist asks for a plan with the scope of work, a floor plan, the existing and new heater locations, the gas demand in BTUs and any vehicle protection; the maker's installation instructions; Title 24 prescriptive energy forms for water heating; and a residential load calculation if electrical load is added. An isometric gas riser diagram may be required when gas demand goes up, and a CPAU Utilities Application when a tankless unit raises it. At the final (inspection 503), the approved plans, permit card and installation instructions must be on site.
Does Palo Alto require a heat pump water heater when I replace a gas one?
Not under the rules the City lists today. On February 26, 2024 the City Council suspended enforcement of its heat pump water heater replacement requirement for residential addition and alteration projects. Those projects still have to meet electric readiness requirements, such as pre-wiring, when they replace or add a gas appliance. A proposed 2026–2028 code update would require a heat pump water heater, or solar thermal with gas, when a gas water heater is replaced starting in 2027; check its status with the Development Center at (650) 329-2496. See heat pump water heaters.
What rebates does CPAU offer for a heat pump water heater?
CPAU, which supplies both electricity and gas in Palo Alto, offers rebates through its Rebate Hub for residents with active CPAU electric and gas service when a heat pump water heater replaces a gas or electric resistance unit. The heater must meet NEEA Tier 3 or higher; reserve before work starts, then submit the final application with proof of permit inspection. There's also a permit-fee add-on, and the City's Electrify My Home service, (650) 713-3411, can handle the whole job, including emergencies. See Palo Alto Utilities rebates.
Is Palo Alto's water hard on water heaters?
Less than most South Bay water. Palo Alto buys from the San Francisco Regional Water System, mostly Hetch Hetchy snowmelt, and CPAU's 2025 report shows hardness averaging 62 ppm (8.1 to 112 ppm). That slows scale on tankless heat exchangers and sediment in tanks, but flushing a tank and descaling a tankless unit on the maker's schedule still extends its life. See tankless water heaters.
Who do I call if my water heater leaks or I smell gas in Palo Alto?
For a leak, close the cold-water valve on top of the heater and shut off its gas or power. If you smell gas, leave the house and call CPAU Utilities Dispatch, the City's 24-hour line for gas leaks, at (650) 329-2579, or 911. Then call us at (408) 978-3093, 24/7, for the heater itself. See 24/7 emergency plumbing.
How much does water heater repair and replacement cost in Palo Alto?
Most jobs are quoted as a fixed price before we start, so you know the cost up front. Typical prices: tank water heater $1,200–$2,000+; gas water heater $1,500–$4,500+; electric water heater $1,600–$4,000+; tankless water heater $1,800–$6,000+; heat pump water heater $2,500–$6,000+. The inspection fee is $59, waived for service plan members.
Need water heater service in Palo Alto? Call us.
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