How much does it cost to install a 75-gallon water heater?

National Average Range:
$2,000 - $4,000

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Updated: August 19, 2022

Reviewed by Cristina Miguelez remodeling expert. Written by

To provide you with the most accurate and up-to-date cost figures, we gather information from a variety of pricing databases, licensed contractors, and industry experts.

Water heaters are an important feature in any home. They provide water for bathing, cooking, and washing. They come in various sizes, with larger water heaters like a 75-gallon tank-style heater being most commonly used in homes with large families or homes with large bathtubs and other high water needs.

The national average cost range to install a 75-gallon water heater is $2,000 to $4,000, with most people paying around $3,000 for an energy-efficient, gas-powered 75-gallon heater in a direct replacement in an easy-to-access area. This project’s low cost is $1,500 for an electric 75-gallon heater installed in an open and accessible area. The high cost is $6,000 for a high-efficiency, gas-powered 75-gallon heater with a new vent in a difficult-to-access area.

75-Gallon Water Heater Cost Calculator

75-gallon water heaters are a relatively common size. They can be found in many types and are powered by electricity or gas/liquid propane. At this size, most 75-gallon water heaters need to be at least fairly energy-efficient because heating this much water can take a lot of energy. The best heaters have multiple factors to improve their efficiency levels, while the most basic heaters have the fewest efficiency modifications. Below are the average costs for a 75-gallon heater of different qualities.

Electric water heaters are the least expensive to purchase and install. They also cost more to run in most areas than gas or propane heaters. Gas and propane heaters are more popular because they are more efficient, but they cost more upfront. The best quality heaters can be electric or gas but often have many modifications to make them ultra-efficient. This includes condensing the fuel, heated coils in the center, and better insulation.

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Additional Considerations and Costs

  • Top manufacturers. 75-gallon water heaters are popular and made by most top manufacturers, including Rheem, Rinnai, A. O. Smith, and Bradford White.
  • Lifespan. Most water heaters last between 10 and 15 years. Most have warranties for about 6 years.
  • Maintenance. Maintenance for water heaters is fairly easy for homeowners. The tank should be periodically emptied and flushed to remove sediment.
  • Mounting. 75-gallon heaters are large enough that they must be floor-mounted. They also require more space than smaller heaters because they are large.
  • Piping. Expect to pay between $8 and $10 a linear foot to extend your plumbing to reach the water heater.
  • Permit. Permits may be required to install a new water heater in some areas. Speak to your local municipality for more information.


  • How much does it cost to replace a 75-gallon water heater?

The average replacement cost ranges from $2,000 to $4,000 for a 75-gallon water heater. However, your costs can be higher or lower, depending on the model and where it is installed.

  • How long does a 75-gallon water heater last?

Most tank-style water heaters last 10 to 15 years. Some may last longer, while others may not last as long.

  • How many people can a 75-gallon water heater sustain?

75-gallon water heaters are designed for families of 5 or more. They can also be used for smaller households with higher-than-average water needs.

  • Do they make 75-gallon electric water heaters?

Yes, there are many 75-gallon electric water heaters, including some hybrid models that use an electric heat pump to heat the water for better efficiency.