It depends on the type of water heater, but most professionals charge around $300-400 for installation. Keep in mind that this price may vary depending on your location and the company you use. You can also try to install the water heater yourself, but be sure to read the instructions carefully first!

The average installation cost for a standard electric water heater is about $800, while the average installation cost for a gas water heater is about $1,200. However, these costs can vary significantly depending on the contractor you hire, the type of water heater you choose, and your location. So it's best to get quotes from several contractors before making a decision.