Water Heater Repair Denver: $228 to $1,017 + Fix or Replace

Repair rows are national; no publisher lists a Denver-only water heater repair price. The installation and service call rows are Angi's Denver figures.

Do this now: a Denver water heater leaking or out

1. Smell gas? Leave the house and call Xcel Energy or 911 from outside. Do not flip switches or relight anything. More in gas leak: what to do.
2. Water spreading? Close the cold water valve above the heater, or the main shutoff, and turn off the gas valve or the heater's breaker. HomeGuide lists a water heater flooding an area as a plumbing emergency.
3. Leak from the bottom of the tank? HomeGuide says that usually means the tank itself has failed and needs replacing; leaks from fittings, the drain valve or the relief valve may be fixable.
4. No hot water on a gas unit? HomeGuide says a pilot that will not stay lit usually points to the thermocouple or gas control valve.
5. Keep receipts and photos. If the leak raised your bill, Denver Water may adjust it once the leak is fixed (apply within 12 months, 303-893-2444).

Is it an emergency? When a Denver water heater cannot wait

A leaking tank, a gas smell or no hot water in a freeze is an emergency; a lukewarm tap is not. Denver averages 156.3 nights a year at or below 32 F and 6.2 nights at or below 0 F at the airport, NOAA's 1991 to 2020 normals show, so a heater that quits in winter leaves a house without hot water when pipes are also at risk. A tank that drips from the bottom will not get better; HomeGuide says that is usually a replacement. A noisy tank or rusty water (sediment or anode wear, HomeGuide says) can wait for a weekday visit, when labor costs less than the emergency rates on the emergency plumber in Denver page.

Repair or replace a Denver water heater

Replace a tank that is more than 10 years old or when a repair would cost more than half of a new one, HomeGuide advises, and HomeAdvisor says tanks last about 10 to 15 years. A new heater in Denver runs $800 to $2,000 installed, Angi's August 2026 Denver guide says, close to HomeAdvisor's 2026 national range of $882 to $1,826 for a replacement. Denver's median home was built in 1975, the Census Bureau's 2020 to 2024 survey shows, and 55.5% of the city's housing units were built before 1980 by its year-built counts. Go by the date on the heater's label, not the age of the house, and ask the plumber to check the venting and shutoff valve when quoting. See water heater replacement cost and tankless water heater installation for national prices by type.

Denver water is soft to moderately hard: what it means for the tank

Denver Water's distribution system averaged about 105 mg/L total hardness in 2025, with samples from 55 to 124 mg/L, its 2026 Water Quality Report shows. On Denver Water's own scale, soft is under 60 mg/L and hard is 121 to 180 mg/L, and the utility calls its water soft to moderately hard, slightly harder in winter. That is moderate scale: HomeGuide says popping or rumbling noises come from sediment, and a flush runs $75 to $250 nationally. A heater that rumbles is a maintenance call, not an emergency.

Permits for water heater work in Denver

Water heaters are on Denver's Quick Permit list for single-family homes and duplexes under both plumbing and mechanical work, and quick permits are applied for online and generally issue right away, Denver Community Planning and Development says. For multifamily and commercial buildings, gas-fired water heaters are no longer quick permit items. Homeowners must pass an exam before doing their own plumbing or mechanical work, unless they hold a state license. Angi's Denver guide puts city permit fees at $20 for projects valued at $1 to $500 and $35 for $501 to $2,000. Plumbers are licensed by the Colorado State Plumbing Board; look the license up on DORA's online lookup.

Local rules, programs and climate for Denver, from official city, state, utility, Census and NOAA pages. Aurora, Lakewood and other metro cities set their own rules.

Questions to ask a Denver water heater plumber

1. What is your Colorado plumbing license number?
2. Is the price for the part and labor together, and is the service call credited?
3. How old is my heater, by the date on its label, and is it worth repairing?
4. Will you pull the Denver quick permit if this becomes a replacement?
5. Can I see proof of insurance and a written price before work starts?

More Denver plumbing guides

All plumbing in the city: plumber in Denver. Clogs: drain cleaning in Denver. Other cities: water heater repair in Salt Lake City and water heater repair in Phoenix. National part-by-part prices: water heater repair cost. Every trade is priced on home repair costs. Calls go to an independent company that serves your area and takes this kind of job (how calls work).