Abstract: The report reviews current home fire sprinkler system costs against the 2008 benchmark study to gain a better understanding of how increasingly widespread adoption of sprinkler ordinances impacts system cost. The costs for residential sprinkler installations in Cheatham and Davidson Counties are profiled starting on page 22. This information is useful in dispelling rumors and misinformation about the true cost of adding residential sprinklers to a home. One fact of note in the report is that the average cost per square foot of an NFPA 13D installation decreased from 2008 to 2012.