How Much Does Water Heater Replacement Cost in Tennessee?
National cost guides put a typical tank water heater replacement at $882 to $1,826, with an average of $1,348. A basic 40 to 50 gallon electric swap can start near $600. A large gas tank with new venting can pass $3,100.
These are market numbers, not our price list. About three in four Tennessee homes heat water with electricity, per the U.S. Energy Information Administration’s 2020 household survey. Nationwide, that share is under half. So the electric price band fits most homes here. For how the work itself goes, see water heater installation.
What does a new water heater cost by fuel and size?
Fuel and tank size set most of the price. The ranges below come from national cost guides. Each one covers the unit plus labor.
| Water heater job | Installed market range |
|---|---|
| Typical tank replacement, middle of the market | $882 to $1,826 |
| 40 to 50 gallon electric tank | $600 to $1,800 |
| 40 to 50 gallon gas tank | $900 to $3,100 |
| 65 to 80 gallon tank | $900 to $4,000 |
| Heat pump (hybrid) electric tank | $2,000 to $4,600 |
| Tankless unit, for comparison | $1,400 to $5,600 |
Gas tanks cost more to put in. They need a gas connection and a vent for the exhaust, and both add labor. Another national guide puts the average electric swap near $1,080 and the average gas swap at $1,240 to $1,350.
An electric swap usually reuses the 240-volt circuit the old tank ran on. The 40 and 50 gallon sizes are the most common, and they sit close together on price. One guide suggests 40 gallons for 1 to 2 people and 50 gallons for 3 to 4. A heat pump tank sits at the top of these tank ranges. It also needs open air around it, so a tight closet may not suit it.
What add-ons can raise the price?
Most quotes start with the tank and the labor. The extras below are where totals climb.
| Add-on or upgrade | Market range |
|---|---|
| Expansion tank | $90 to $400 |
| Hookup parts such as pipes and valves | $150 to $500 |
| Bringing old plumbing up to code | $75 to $500 or more |
| Replacing an existing gas vent | $100 to $600 |
| Venting a gas heater for the first time | $500 to $1,500 |
| Removing and disposing of the old tank | $75 to $500 |
| Permit, where one is required | $25 to $300 |
| Moving the heater to a new spot | $150 to $3,400 |
| Switching from gas to electric | $250 to $1,000 or more |
| Switching from electric to gas | $400 to $2,000 or more |
Access matters too. A tank in an attic or a cramped closet takes more labor hours. A power-vent gas unit uses a fan that needs wiring. One guide puts that upgrade at $600 to $1,100 more.
Which code items can add to a replacement in Tennessee?
Code editions differ across Middle Tennessee. The state fire marshal lists the 2018 International Residential Code for homes. Metro Nashville has adopted the 2024 edition, and so has Rutherford County.
Both editions call for a drain pan where a leaking tank would cause damage. On a replacement, neither requires a new pan drain where none existed before. Both also set rules for the relief valve’s discharge pipe. An old setup that misses those rules adds a code fix to the bill.
The code also calls for thermal expansion control when a supply valve lets pressure build as water heats. A one-way check valve can do that, and so can a pressure regulating valve. The usual fix is a small expansion tank.
Permit rules change from town to town. Metro Codes says replacing a home’s 50-gallon water heater in Nashville generally needs no permit. A fuel change, such as gas to electric, does. Gallatin’s permit table lists plumbing and electrical permits for water heaters. Lebanon’s city code requires a city permit to install a gas water heater. Your city or county codes office answers the question for your address.
Should you repair or replace your water heater?
Many failures come down to one part. National guides put a new heating element or thermostat at $100 to $350. A gas control valve runs $150 to $550.
A leak from the tank itself is different. Once the steel tank rusts through, the whole heater has to be replaced.
The same guides give a simple rule. Replace when a repair costs more than half the price of a new unit. Tanks last about 8 to 12 years on average, so weigh replacement once yours passes 10.
Hard water can shorten that span. Metro Water Services rates Nashville’s water as moderately hard in its latest water quality report. The U.S. Geological Survey says heated hard water leaves scale that can cut a heater’s life. A yearly flush clears sediment, and it is part of water heater repair and upkeep.
When should you call about a failing water heater?
These signs point to a tank near the end of its life:
- Water pooling around the base of the tank
- Rusty or brown hot water
- Popping or rumbling sounds from the tank
- Hot water that runs out fast or stays lukewarm
- A tank past about 10 years old
A planned swap costs less than a swap plus cleanup. National guides put a typical water damage repair at $1,300 to $5,550. That bill comes on top of the new heater.
Thinking about a tankless unit instead? Tankless water heater installation has its own page. Our tank or tankless guide for Middle Tennessee compares the two.
How do you get a firm price for your home?
Your price depends on the tank, the fuel, the space and any code fixes. We look at the job and put the quote in writing before work starts. We replace and relocate tank water heaters across Nashville and Middle Tennessee. La Vergne sits at the center of our service area. Call or text (615) 723-2488, or start with our water heater replacement page.