What a water heater replacement involves
The old tank is drained, disconnected and carried out, and the new one goes onto the vent, the water lines and the gas or electric supply. Health and Safety Code 19211 requires every new and replacement heater to be braced, anchored or strapped against earthquake motion, so make sure the straps are in the quote.
A change of fuel, of vent or to tankless is a bigger job. The estimate table prices a power-vent tank and a tankless unit in rows of their own.
- Turn off the water and the gas or power, then drain the old tank.
- Disconnect it, take it out, and set the new heater with its vent, water lines and relief valve.
- Strap the new heater against earthquake movement and test every connection.
- Pass the permit inspection, and keep the final approval, because LADWP's rebate asks for it.
What a water heater replacement costs in California
A standard tank swap comes to $1,125 to $5,600 installed, standard tank heater on our model, permit included. A power-vent tank is $1,800 to $3,425 installed, power-vent tank, and tankless is $1,725 to $4,575 installed, tankless. All three come from 2 national published ranges adjusted for California plumber pay, and none is a quote. Two California companies publish a tank swap price, too few for a range of their own, so the tank row stretches to take in their lowest and highest.
| Item | Figure | What it is |
|---|---|---|
| Estimated range, standard tank swap, not a quote | $1,125 to $5,600 installed, standard tank heater | A like-for-like tank heater swap on the existing vent, gas line and outlet. Built from 2 national published ranges, adjusted by the California plumber wage ratio (1.14) plus a typical permit fee ($116), then widened to take in the lowest and highest of the two California company prices for this job ($1,200 to $5,600). Basis: small sample (2), national estimate joined with the company range. |
| Estimated range, power-vent tank, not a quote | $1,800 to $3,425 installed, power-vent tank | A power-vent gas tank, which needs an outlet, a fan and a new vent run. A new chimney liner is quoted separately and is not in this row. Built from 5 national published ranges, adjusted by the California plumber wage ratio (1.14) plus a typical permit fee ($116). Basis: no state company sample (no counted California company price for this job), national estimate only. |
| Estimated range, tankless conversion, not a quote | $1,725 to $4,575 installed, tankless | A tankless unit in place of the tank, with the venting, gas line and electrical work it usually needs. Built from 3 national published ranges, adjusted by the California plumber wage ratio (1.14) plus a typical permit fee ($116). Basis: no state company sample (one counted California company price for this job), national estimate only. |
| Plumber wage, California mean | $39.58 an hour | BLS mean hourly wage for California plumbers, May 2025. Pay to the worker, so don't read it as a price. |
| Water heater permit, California middle of published fees | $116 | Middle water heater permit total across 33 California city fee schedules. Each city sets its own, so look up yours. |
Estimated ranges, one row per scope. Built from national published ranges (8 sources in all, 2 to 5 per row), adjusted by California's plumber wage ratio to the US (1.14, BLS May 2025), plus the local permit fee where the city publishes one. Not a quote. California plumbing companies that publish a price get their own rows, apart from the estimate. Full method. Prices as of Oct 23, 2026.
Repair or replace: where the water comes from
Where the water comes from settles most cases, so ask the plumber to show you the spot.
- One part has failed and the body of the tank is dry.
- Water is coming out of the tank body itself.
Who may replace a gas water heater in California
CSLB's C-36 plumbing class lists the "installation of any type of equipment to heat water" alongside "all gas appliances, flues and gas connections" in one description. Ask whether the company's license carries C-36, then check the number on CSLB's lookup, which also shows any complaint disclosure.
B&P 7044 lets a homeowner improve a principal residence they've lived in for the 12 months before the work is finished, on no more than two structures in three years. CSLB tells homeowners to "be wary of 'consultants' or unlicensed individuals" who try to talk them into becoming an owner-builder to save money.
Heat pump, tankless or tank: the 2026 code and the rebates still listed
Buildings whose permit applications are filed on or after January 1, 2026 have to meet the 2025 Energy Code, and the California Energy Commission says that code "expands the use of heat pumps in newly constructed residential buildings."
LADWP pays up to $2,500 for an ENERGY STAR heat pump water heater that replaces a gas heater. It's one per residence. The claim needs a paid itemized invoice, a spec sheet and a final approved Building and Safety permit. SoCalGas lists $80 to $1,500 for a high-efficiency tankless heater that replaces a tank in a detached single-family home, and $300 to $575 for a storage heater with a UEF of 0.64 or more and 55 gallons or less.
SDG&E says the Golden State Rebates retail offerings have ended, and TECH Clean California's small multifamily heat pump water heater incentives were fully reserved as of July 10, 2025. PG&E's rebate page lists no amount. The IRS says the federal 25C credit covers improvements made through December 31, 2025.
A failing water heater: signs that mean call now
- A puddle under the tank won't stop growing even with the heater's cold supply closed.
- Gas smell by the heater: get out, ring 911 once you're outside, then the gas company (SoCalGas 1-800-427-2200, SDG&E 1-800-611-7343, PG&E 1-800-743-5000).
- A ceiling under the heater is sagging, or water has got to the electrical panel.
- No hot water but a dry floor, which can wait for a booked visit.
What to check before you buy a new heater
- Find where the water starts: a drip from a fitting can be repaired, while a leak from a seam or the tank body means replacement.
- Note the make, the gallons and the fuel from the label, and give every company the same details.
- Ask each company whether its quote includes the permit, the strapping and hauling away the old tank.
- Read the rebate rules before you buy, since LADWP needs the final approved permit and SoCalGas's tankless rebate is limited to detached single-family homes.
Permits for a water heater swap
Los Angeles lists replacing water heaters among its plumbing Express Permits, which need no plan check and can be issued online. San Diego puts a replacement other than a tankless unit under its simple no-plan plumbing and gas permit, applied for in the online portal. Long Beach lets a one- or two-family home apply for a water heater changeout online and have it issued automatically. San Jose requires a plumbing permit for installing or replacing a heater. It also sets strapping rules.
The middle permit total across 33 California city fee schedules is $116. Your own city's schedule sets the figure you'll pay.
Ask for the license number before any work starts and look it up on CSLB's Check a License page, which shows whether the license is active and any complaint disclosure.
Questions people ask
Which California cities require a permit for a new water heater?
All four cities treat a replacement as permit work, from LA's Express Permit to Long Beach's automatic online changeout. CSLB says code requirements vary by city and county, so for anywhere else, ask your building department which permit applies.
Can I install my own water heater in California?
B&P 7044 exempts a homeowner improving a principal residence they've occupied for the 12 months before completion, used on no more than two structures in three years. CSLB warns against people who try to talk homeowners into owner-builder status as a way to save money.
How much is a water heater permit in California?
Across 33 California city fee schedules the middle total is $116. Fees are built differently from city to city, so your city's schedule has the real figure.
What will a new water heater cost me in California?
A standard tank swap is $1,125 to $5,600 installed, standard tank heater on our model, and that's an estimate, not a quote. By the same method a power-vent tank runs $1,800 to $3,425 and a tankless heater $1,725 to $4,575.
Which license should the installer of a gas water heater hold?
CSLB's C-36 class lists gas appliances, flues and gas connections and the installation of equipment that heats water. Get the license number and class before work starts.
Are there rebates for a new water heater in California?
LADWP's heat pump water heater rebate and SoCalGas's 2026 tankless and storage rebates each come with conditions on the heater and the home. Golden State Rebates' retail offers have ended, TECH Clean California's small multifamily incentives were fully reserved by July 10, 2025, and the IRS's 25C credit covers improvements made through December 31, 2025.
- U.S. Bureau of Labor Statistics, OEWS May 2025: Plumbers, Pipefitters, and Steamfitters (SOC 47-2152), California, mean hourly wage Read Oct 23, 2026.
- U.S. Bureau of Labor Statistics, OEWS May 2025: Plumbers, Pipefitters, and Steamfitters (SOC 47-2152), United States, mean hourly wage Read Oct 23, 2026.
- PlumberMatch: how we estimate costs, California (editorial policy) Read Oct 23, 2026.
- LADBS IB P/GI 2020-003 Express Permits Read Oct 20, 2026.
- LADBS Express Permits Read Oct 20, 2026.
- San Diego DSD Plumbing/Gas Permit Read Oct 20, 2026.
- City of Long Beach Permit Center: Online Permits Read Oct 20, 2026.
- City of San Jose: Water Heaters (updated 04/14/2026) Read Oct 20, 2026.
- CEC: 2025 Building Energy Efficiency Standards Read Oct 20, 2026.
- LADWP: Consumer Rebate Program Read Oct 20, 2026.
- SoCalGas: Rebates and Incentives (residential) Read Oct 20, 2026.
- TECH Clean California: Incentives Read Oct 20, 2026.
- SDG&E: Golden State Rebates (program update) Read Oct 20, 2026.
- PG&E: Rebates and Incentives Read Oct 20, 2026. Check this with the source itself before you rely on it.
- IRS: Energy Efficient Home Improvement Credit Read Oct 20, 2026.
- SoCalGas Stay Safe Read Oct 20, 2026.
- SDG&E Gas safety Read Oct 20, 2026.
- PG&E Gas safety Read Oct 20, 2026.
- Health and Safety Code 19211 Read Oct 20, 2026.
- CSLB: C-36 - Plumbing Contractor Read Oct 20, 2026.
- CSLB: Check A License Read Oct 20, 2026.
- Business and Professions Code 7044 Read Oct 20, 2026.
- CSLB: Owner-Builder Risks Read Oct 20, 2026.
- CSLB: Do I need a building permit for my project? Read Oct 20, 2026.