How much does it cost to replace a 30-gallon water heater?

National Average Range:
$700 - $1,200

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Updated: August 17, 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.

No matter your home size or how many people reside there, water heaters are a much-needed appliance. They provide hot water for bathing, cooking, and cleaning. A 30-gallon tank-style heater is often enough to provide you with the hot water for small homes with 1 or 2 people and low water needs. 30-gallon water heaters come in electric and gas/propane-powered types and have many efficiencies.

The national average for replacing a 30-gallon water heater is $700 to $1,200, with most people spending around $950 on a gas-powered, energy-efficient 30-gallon water heater in a direct replacement in an accessible location. This project’s low cost is $570 for a 30-gallon electric water heater installed in an open and accessible area. The high cost is $2,000 for a 30-gallon high-efficiency water heater installed in a difficult-to-access area with some modifications.

30-Gallon Water Heater Cost Calculator

30-gallon water heaters are small. They are most often used in single residences or homes with 2 people and low water needs. You may also add one to an addition if your current heater is not large enough to meet your new needs. These heaters come in several efficiencies, from standard heaters to those that can heat water quickly with little energy. Below are the average costs for 30-gallon water heaters of different qualities.

30-gallon water heaters come in several types and styles. Most are floor-mounted, but a few can be wall-mounted. Electric water heaters are the least expensive to purchase and install, but they cost more to run. Gas or propane-powered heaters are more expensive but save money over time. Efficient models save the most but cost the most to purchase and install because they often require vents and drains that the more standard models do not.

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Additional Considerations and Costs

  • Top manufacturers. 30-gallon water heaters are common and produced by many brands. These include Rheem, Bosch, Reliant, and Bradford White.
  • Lifespan. Most water heaters last between 10 and 15 years with regular usage.
  • Maintenance. Maintaining a water heater is fairly simple. The tank should be drained periodically and flushed to remove sediment from the bottom.
  • Mounting. 30-gallon water heaters are usually mounted on the floor but are small enough to be wall-mounted. Depending on the location, doing so may increase costs.
  • Piping. If you need additional plumbing for your water heater to reach the pipes, expect to pay $8 to $10 a linear foot for new pipes to be installed.
  • Permit. Permits are required in some areas for new water heater installations. Check with your local municipality for more information.


  • Is there a 30-gallon water heater?

Yes, there are 30-gallon water heaters. They are typically used in households of 1 or 2 people.

  • How much does a 30-gallon water heater cost?

The heater costs $300 to $1,100. The average range to install a water heater of this size is $700 to $1,200.

  • How long does it take to install a 30-gallon water heater?

This varies depending on several factors. It should take about 3 hours in most cases.

  • How long does it take for a 30-gallon water heater to heat?

Most 30-gallon water heaters heat the water in under an hour. The more efficient the heater, the faster it can heat.

  • How long do 30-gallon water heaters last?

Most water heaters last between 10 and 15 years with average use. Some may last longer if well maintained.

  • What is the difference between a 30 and 40-gallon water heater?

Size and water output are the only differences. A 30-gallon water heater produces enough water for 1 to 2 people, while a 40-gallon water heater produces enough for 2 or 3 people with low water needs.