What Does a Water Heater Replacement Cost in Downey, CA?

If the gas water heater in your Downey home has finally quit, the book price to replace it is $1,595 for 30 or 40 gallons and $1,795 for 50, installed; an electric unit is $1,450 or $1,675. The price is the same across our service area. What the Downey permit costs, which code items the inspector will expect, and whether the unit lives in a garage or a closet are what move the final number, so that is what this guide covers.

The replacement price covers delivery, draining and removing the old unit from its spot, a new Bradford White or A. O. Smith gas storage tank (or another brand if you have a preference), new hot and cold water supply lines, a one-year labor warranty on every connection we make, and the manufacturer's six-year warranty on the tank. It assumes a residential, same-location swap of an existing water heater at ground level, in the garage or on the side of the house. Hauling the old tank away is $95. The permit and any code items are separate, and they are the part of the quote that actually varies, so they get their own sections below. The full list is on our pricing page, and the replacement itself is described on our water heater installation page.

Downey is known for its mid-century housing stock, the 1950s and '60s homes of North Downey, Downtown Downey and the neighborhoods east of the 605. Many garage and closet installations still have original galvanized supply lines, undersized gas connections, and no expansion tank or seismic strapping, none of which passes a current City of Downey inspection. Replacement day is when the inspector expects those to be brought up to current code. The book prices for the items that come up most: earthquake straps $225 when added during the installation; a drain pan without piping $75; a gas sediment trap $225; a gas valve and supply line $165; a venting upgrade from single wall to double wall $250 to $450 for up to four fittings above the heater; and a 3/4-inch cold water inlet ball valve $249. An expansion tank is quoted on site. A closet installation inside the house, or a second-floor unit, carries a $249 surcharge over the book price.

The City of Downey Building & Safety Division requires a plumbing permit and an inspection for a water heater replacement; the office is at 11111 Brookshire Avenue and can be reached at (562) 904-7142. We pull the permit and meet the inspector for a $295 administrative fee plus the city's own permit fee, which is passed through at cost as its own line on the quote. Downey's published fee for a water heater change-out is $129.16 (the schedule's plumbing permit minimum; the water heater and vent line itself is $62 plus a $60.01 issuance fee), so the permit line comes to $295 + $129.16 = $424.16. A water heater change-out can be issued online as an auto-issue permit through the city's Accela portal. Downey's 2026 residential code amendment (Ordinance 26-1537) requires mechanical and plumbing equipment to be anchored to the structure, which for a full water heater means seismic strapping. You can decline and pull the permit yourself, but if the inspector then calls for a code correction, that work is charged at book price.

Downey sits over the Central Basin, and its groundwater runs hard; we can tell you the utility's published hardness figure for your address when we quote. Sediment settles on the bottom of a gas tank, insulates the burner from the water above it, and makes the unit run longer and hotter for the same shower. That does not change the replacement price, but it decides how long the new tank lasts. A storage tank flush is $139, and on this water most tanks do better on a flush every year rather than every two. The storage tank membership is $99 per year and includes that yearly flush, free diagnostics when a repair is needed, 10% off services and add-ons, and 5% off a replacement.

If the current heater is electric, the replacement is $1,450 for 30 or 40 gallons and $1,675 for 50, tied in to the existing electrical connections; any problem with the wiring itself is work for an electrician. A 75- or 100-gallon tank is quoted on site. If you are considering a tankless unit while the tank is out anyway, converting a 40-gallon tank to a Noritz EZTR40 is $3,295 and a 50-gallon tank to an EZTR50 is $3,695; we cover that in what a tankless water heater costs in Downey. Pressure regulators, expansion tanks, circulating pumps and relocations are quoted on site. For how the numbers compare across the area, see our San Gabriel Valley replacement cost guide.

Book prices apply during normal business hours, Monday through Friday, 8 AM to 5 PM; pricing outside those hours or in an emergency is subject to change. Give us at least 24 hours to schedule. Prices are current as of September 2026 and subject to change, and nothing is charged that was not on the written quote. If you need to pay over time, financing is available. We come out from Pico Rivera, about 10–15 minutes from most Downey addresses; call 833-927-3356 or contact us and we will send the number in writing.