Tankless water heater cost with installation

Looking for tankless water heater cost with installation in Lexington-Fayette, KY? Call WaterHeater Pros for a contact a provider — no obligation. Licensed plumbers serve Lexington-Fayette and the surrounding area, and you'll get straight answers on timing and what affects the price.

Last updated: September 24, 2026

Need help right now? If your water heater is leaking or you have no hot water, don't wait for the problem to get worse. Water damage can happen quickly, so it is best to address the issue right now. We have local technicians ready to help you get things back to normal. Licensed, independent service providers serve your area — call now for a contact a provider. (978) 759-4817

What affects the price

The final price for a new water heater depends on a few moving parts. First, you have to choose the right fuel source—gas or electric—and decide if you want to stick with a standard tank or upgrade to a tankless model. We also look at the physical space where it sits and whether your current venting or gas lines meet modern safety codes. If we need to move the unit or upgrade plumbing to get it up to speed, that shifts the labor involved. Exact pricing confirmed free on the call.

About this service

When you bundle the unit and labor, you are paying for both the high-efficiency equipment and the expertise required to configure it. Factors influencing the total include the unit's capacity, existing plumbing condition, and any necessary modifications to your ventilation systems. These projects are more complex than traditional tank installs, so professional setup is essential for performance.

While you might not think about hot water as much in the summer, it is a great time to evaluate your system’s health. Because the incoming groundwater is warmer, your heater doesn't have to work as hard, making it a stress-free window to replace an aging unit before you hit the busy autumn season.

Frequently asked in Lexington-Fayette

How long do hot water heaters typically last?

Traditional tank water heaters generally last between 10 to 15 years. Tankless water heaters, when maintained properly, can often provide service for 20 years or more. The age of your current unit is a critical factor when deciding between repair and replacement.

What is the average cost of putting in a water heater?

What is the most efficient type of water heater?

Tankless water heaters are generally considered the most energy-efficient option because they heat water only when you need it. This on-demand heating eliminates the energy waste associated with keeping a large tank of water hot constantly. Heat pump water heaters also offer high efficiency.

What are signs I need a new water heater?

You should consider a new water heater if you notice rusty or discolored hot water, unusual noises like banging or popping, frequent leaks around the unit, or a significant decrease in hot water availability.

What is the most common problem with a hot water heater?

For tank water heaters, sediment buildup inside the tank is a common issue that can reduce efficiency and lead to premature failure. Leaks from the tank or the temperature and pressure relief valve are also frequent problems. Tankless units can sometimes experience issues with mineral deposits or ignition. Regular maintenance helps prevent most common problems.

Is it worth it to repair a hot water heater?

Repairing a water heater is often worthwhile for minor issues on a newer unit, as it can be more cost-effective than immediate replacement. However, if the tank itself is leaking or the unit is nearing the end of its lifespan, investing in a new, more efficient model is generally the better long-term financial decision. A professional can provide expert advice.

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More on this: DOE water heating — efficiency and sizing.