Yes, you can install a water heater yourself, provided you are replacing an existing electric unit with a similar model and possess basic plumbing and electrical skills. However, for gas and tankless units, the risks—such as gas leaks and electrical upgrades—make professional installation the safer and recommended choice.
However, you can replace the electric water heater yourself. This guide will cover how to install an electric water heater. It includes basic information on positioning the new water heater, connecting the electrical supply and adjusting the thermostat.
The Home Depot offers traditional water heater tanks and modern tankless units, both powered by either gas or electricity. Depending on your selection, the average cost for standard tank installation is generally between $1,600 to $2,400. Tankless installation can range from $2,400 to $5,400.
DIY installation carries risks. Mistakes can lead to water leaks, poor performance, or even hazards like gas leaks or electrical issues. Plus, doing it wrong might void the warranty, leaving you without protection if problems arise. Think hard about these consequences before you attempt to install them.
Understanding Permits and Local Codes: In most municipalities, replacing or installing a hot water heater requires a permit. Even if you know how to do the work, it still needs to pass an inspection. Ignoring this step can lead to fines, problems during home sales, or even denied insurance claims.
If the project is as simple as replacing an old water heater with a new one, a handyman can likely do it with no trouble. However, converting a gas water heater to an electric one or putting in specific wiring and framing for the water heater will likely require the skill set of a licensed professional.
Traditional tank water heaters last 8 to 12 years, while tankless models typically last 15 to 20 years. Lifespans vary greatly depending on water quality, unit design, and whether you perform regular maintenance like flushing the tank and checking the anode rod.
Safety Risks: When “Good Enough” Isn't. A poorly installed gas water heater isn't just a bad idea—it's a dangerous one. Without a permit, there's no guarantee the installation meets safety codes, and that's where things get dicey. From gas leaks to electrical faults, the risks are real and well-documented.
With a 40-gallon tank, your hot shower will typically last about 10 to 20 minutes. The exact duration depends heavily on your showerhead's flow rate and the temperature you set your water heater to.
Average Water Heater Installation Cost
Mid-range installations, which may involve larger tanks or higher-efficiency models, typically cost $1,500 to $2,500. High-end installations, such as tankless systems or jobs that require major electrical, gas, or venting upgrades, can reach $3,000 to $4,000 or more.
Stores like Home Depot and Lowe's often include removal when delivering a replacement unit. This is the most convenient option, especially if the old unit is still in place and connected.
Some of the most reliable tank water heater brands in 2026 include Rheem, A.O. Smith, and Bradford White. These manufacturers have long histories of producing durable, efficient heaters with strong warranty coverage. Rheem is known for overall dependability and wide availability, A.O.
Tank to Tank Installation: On average, replacing a gas or electric water tank with a similar model takes two to three hours. It takes between 45 to 60 minutes to drain, disconnect and remove your old water heater.
A: Traditional tank water heaters usually last 8–12 years, while tankless units often last 15–20+ years. Q: Should I replace my water heater if it's over 10 years old? A: Often yes. Even if it still works, the risk of leaks and sudden failure increases significantly after 10 years.
Professional installation costs to replace a water heater
The more hours of electrical, carpentry and plumbing work that are required for your installation (for example, installing new electric, water or gas lines or drywall), the higher your total water heater replacement cost.
Electric water heaters come with a few notable drawbacks, most prominently higher monthly operating costs (because electricity is often more expensive than gas) and slower heating or recovery times. They also won't work during a power outage, and larger electric models demand significant electrical panel capacity.
A 50-gallon water heater is generally considered the "sweet spot" and is perfectly sufficient for a family of four, provided your household follows a few common-sense habits:
5 Signs That You Need a New Water Heater
It will usually cost less to do the project yourself, as long as you know what you're doing. However, mistakes sometimes cost time and money to correct. If you're unsure of how to accomplish the job, the best option may be to hire a plumber.
A 10-minute shower typically uses 20 to 25 gallons of hot water. Because showers are usually mixed with cold and hot water to reach a comfortable temperature, the actual volume of hot water drawn from your heater will usually be slightly less, while a low-flow showerhead can reduce this amount by up to 50%.
Keep the top of the tank free of dust, debris and flammable products such as paint, gasoline, solvents or adhesives. Also, never use these products near a water heater or any other natural gas or electric appliance because vapors from flammable liquids can ignite.
Sometimes, the reason why your water heater is running out of hot water faster than normal is simply due to the thermostat being set too low or a valve not working properly. Both of these can make your system underperform, which might explain why your hot water doesn't last.
Permits are required on most water heater replacements and pricing varies by state, city and municipality. Our installers can review the permit process and cost with you.
Potential Fines and Code Violations
One of the most immediate consequences of performing plumbing work without a permit is the possibility of fines or code violations. Local building departments may issue penalties if work is discovered that required a permit but was completed without one.
A Florida learner’s permit costs $48.00. However, most local Tax Collector offices add a $6.25 service fee, making your total out-of-pocket cost $54.25.