Many things can change your final cost. The kind of water heater you pick matters. A tankless unit often costs more than a traditional tank. The size of the tank also plays a part. Bigger tanks usually cost more. The brand and features you choose also affect the price.
The difficulty of the installation job also adds to the cost. For example, moving the water heater to a new spot takes more work. Upgrading from a tank to a tankless system is also a bigger job. Always get a few quotes from local pros. This helps you compare prices fairly. Plan for the national range of $882 to $1,825, as of 2026, per Angi.