How Much Does Water Heater Installation And Replacement Cost? forbes.com Water Heater CostsOn average, the cost to replace a water heater is $1,200, including the price of the new unit and labor. At the low end, bargain hunters can get it done for as little as $815. High-end systems can cost up to $10,000 or more, depending on the water heater type, location of the ins .... read more