A lot of jurisdictions, especially those with career fire departments, pay for the fire service by levying property taxes. If the property tax is based on the assessed valuation of structures. buildings, this will increase the tax burden for owner of sprinklered homes and buildings. When a permit is issued for things like sprinkler installation, the tax assessor checks the cost of the addition and increases the assessed valuation accordingly. Thus, owners of sprinklered homes and buildings must pay more taxes even though they have significantly reduced the demand on the jurisdiction's water system and fire department. To counter this, some jurisdictions will ignore the increased valuation caused by sprinkler systems.