Gas water heater replacement cost reflects the unit, the permit, disposal of the old tank, and any venting work the swap requires. In older houses, existing venting may affect the final cost if it is deteriorated, incompatible with the new unit, or no longer meets applicable requirements.
Electric water heater installation cost depends on the unit, access, and existing electrical capacity. Electric models do not require combustion venting, but circuit or panel upgrades can add to the installation scope. Routine maintenance and flushing generally cost considerably less than either installation or replacement, and for landlords managing several properties, they can help reduce the risk of unexpected service calls.