how much does a fire sprinkler system cost
1 For a 3,500-square-foot home, expect to pay about $5,635. 2  Fire sprinklers cost 1%-2% of the cost of a new home. 3  In already existing properties, sprinkler systems typically cost $2,000-$16,000. Nonmetallic installations average $1.18 per sprinklered square foot; a mix of both types costs on average $1.56 per sprinklered square foot; solely using metallic piping typically costs $3.19 per sprinklered square foot. 2  Location can play a role in the cost of fire sprinkler installation.