A standard tank water heater replacement typically costs about $881 to $1,826 installed, based on Angi's 2026 figures, and HomeGuide's wider national range runs from $600 to $3,100. Tankless units cost more, with Angi giving $1,400 to $3,900 and HomeGuide up to $5,600. Los Angeles quotes tend to sit in the upper half of those ranges because of permits, venting and older homes. These are guides, and a plumber quotes the real price. Start with our water heater overview if you are still deciding what to do.
How much does it cost for a plumber to drain a hot water heater?
About $110 to $200 for a standard flush, with a national average near $160, according to published cost guides. A tank flush runs roughly $75 to $150 by one breakdown, and a tankless flush $150 to $350. Bigger tanks cost more. A do-it-yourself flush needs only a hose and about $10 to $20 in supplies.
LADWP recommends flushing the heater at least once a year to keep mineral deposits from building up and to extend its life. Los Angeles water ranges from about 8.6 grains per gallon in the Valley and West to about 16.3 in the east and Harbor areas, so a flush matters more in harder areas. A tank that has never been flushed may give off a lot of scale and, if the drain valve is old, it may not close again, so a plumber is the safer choice for an older tank.
How much does it cost to fix a tankless water heater?
Repairs commonly run about $150 to $700, with small parts such as a sensor or igniter near the bottom of that range, based on HomeGuide's national figures. A descaling flush for a tankless unit costs about $150 to $350. Tankless repairs depend on the brand, the part and the access, so quotes vary widely.
Scale is the most common tankless problem, because the heat exchanger is narrow. Hard Los Angeles water makes yearly descaling worth asking about. If a tankless unit is old and the repair is large, compare it with a new unit. Our page on tank versus tankless water heaters covers the trade-offs, and tankless installation cost covers the price of a new one.
How much does it cost to get your water heater checked?
Most inspections cost about $75 to $200, with electric units at the low end and tankless units near the top, according to published cost guides. A fuller diagnostic or tune-up runs about $180 to $320. Repairs found during the check are extra, typically $50 to $300 or more.
A good check covers the temperature setting, the relief valve, the anode rod, the venting on gas units, the strapping and the connections. The Department of Energy points to about 120 degrees Fahrenheit for most homes. Ask the plumber for a written list of what they checked, and what they recommend, before they start any repair.
How much to repair an electric water heater?
Most electric repairs fall between about $100 and $350 for a heating element or thermostat, depending on the part and the labor, with Angi's city pages showing about $130 to $440 across different cities. A tripped reset button or breaker costs nothing, so check those first.
The details are on our page for Rheem electric water heater repair, which covers the order of checks and the 240-volt safety limits. A tank that leaks cannot be repaired by swapping an element, so if water is pooling, switch the power off at the breaker first and read about water heater leaks.
What size water heater do I need?
Match the heater to your busiest hour, not only to the number of people. Typical tank sizes are 30 to 40 gallons for one or two people, 40 to 50 for two or three, 50 to 60 for three or four, and 60 to 80 for four or five or more. The first hour rating on the EnergyGuide label is the more exact measure.
Fuel changes the rating. A 50-gallon gas heater delivers more hot water in the first hour than a 50-gallon electric, because gas heats faster. For tankless units, flow in gallons per minute matters, and about 3 gallons a minute covers a single shower. These sizing figures come from industry guides, so ask your plumber to size from your actual use.
What does a Los Angeles water heater replacement cost by type and size?
Published figures put a 40-gallon tank at about $600 to $3,000 installed and a 50-gallon at $700 to $3,100, with the heater alone about $400 to $2,100. Gas costs a little more than electric for the same size, because of venting and gas connections. These are national ranges and a plumber quotes the real price.
| Type | Guide range, installed | What drives it |
|---|---|---|
| Tank, standard | $881 to $1,826 (Angi) | Size, fuel, access, permit |
| Tank, wider range | $600 to $3,100 (HomeGuide) | Size and brand |
| Tankless | $1,400 to $3,900 (Angi) | Gas line, venting, fuel |
| Tankless, Los Angeles | $1,616 to $3,829 (Angi) | Average about $2,668 |
| Heat pump | $1,200 to $3,500 (Angi) | Space, air path, electrical |
| Labor only, tank | $150 to $450 (Angi) | Access and complexity |
A tankless conversion often costs more in homes that need a larger gas line or new venting. HomeGuide puts a gas line upgrade at $350 to $2,000, and Los Angeles installers' published pages suggest higher totals for older homes. A permit costs far less, with published estimates of about $60 to $120. Older Los Angeles houses with a tight closet or attic add time.
The names of common searches also carry local twists. Searches that mention PSE&G refer to a New Jersey utility. In Los Angeles your utilities are LADWP for water and electricity and SoCalGas for gas, so check their rebate pages. Searches for a combined furnace and water heater replacement have no standard published price, so ask for each item as its own line on the quote. Emergency or same-day replacement may cost extra, and I found no reliable published premium, so ask before you agree.
What do replacement parts like a thermostat, thermopile or burner cost?
A thermostat typically runs about $100 to $350 installed. A thermocouple or thermopile costs $10 to $30 as a part and roughly $100 to $250 with labor. A burner or gas control valve is a larger repair, and I found no reliable published price, so ask for a written quote after diagnosis.
If a tank itself fails, no part fixes it, and replacing the tank means replacing the heater. Replacing a tank only makes sense on a repairable unit. If you are weighing the two, our guide to repairing a gas water heater shows the cost of the parts side, and water heater anode rod replacement cost lists the small parts. A 30-gallon unit usually costs less than the 40 and 50 gallon ranges above, but not always by much, so compare the whole quote.
What drives the price of a water heater replacement in Los Angeles?
Size, fuel, location, venting, the permit, code items and the haul-away. A heater in a garage corner is easier than one in a hall closet or an attic. Older homes can need a vent corrected, a new shutoff valve or a gas line change, and each adds to the quote. Strapping is a required safety item, not an extra.
LADBS says a plumbing permit is required to replace a gas water heater in a single-family home, except when a contractor registered with the LADBS contractor program does a like-for-like swap. See our page on the plumbing permit for a water heater. The 2025 Energy Code also requires insulation on accessible hot water pipes when a heater is replaced.
Compare three quotes on the same scope: the heater, the permit, the expansion tank where needed, strapping, valves, venting and haul-away. Our page on choosing a plumber for water heater replacement shows what to ask, and plumber cost explains how plumbers price work.
Common questions
What is the new law for water heaters in California?
There are several rules, and they differ by place. The 2025 Energy Code, in force from January 1, 2026, makes heat pump water heaters the baseline for new homes, while allowing like-for-like gas replacement in existing homes. South Coast AQMD's Rule 1146.2 targets larger units, including tankless. A statewide CARB standard was still a proposal in sources I found. Ask your plumber what applies.
How long does a water heater replacement take?
Often a few hours for a like-for-like tank swap in an easy location, plus the permit inspection. A tank to tankless conversion, a new gas line or a hard-to-reach attic can take a full day or more. Ask for an estimate after the plumber sees the space, and allow time for the new tank to reheat.
What should I ask before I hire someone for water heater replacement?
Ask for the CSLB license number and check it online. Ask whether the price includes the permit, expansion tank, strapping, new valves, venting and haul-away. Ask who handles the inspection, and get the heater's make, model and warranty in writing. California limits a home improvement down payment to $1,000 or 10 percent of the price, whichever is less.
How often does a water heater need replacement?
A tank commonly lasts about 8 to 12 years, though hard water, missing maintenance and heavy use shorten that. I would treat that as a rule of thumb rather than a sourced figure. Signs it is time include rust-colored hot water, a leaking tank, rumbling noises and repeated repairs. The date on the rating label tells you its age.
Does someone need to be at the property?
An adult should be there to give access, agree any change to the quote and sign off. Hot water and gas will be off for part of the day. Tenants should tell the landlord, who owns the heater and usually arranges the work. Move stored items away from the heater before the plumber arrives.