This report summarises the results of a research project investigating the cost effectiveness of home sprinkler systems incorporating sustainability aspects. A life cycle assessment approach was used to evaluate sustainability issues focusing on environmental impacts. The previous model for the cost effectiveness analysis for home sprinklers was revised to account for input parameter uncertainty by including input distributions instead of single value inputs and by conducting simulations that sampled the input distributions. Overall, incorporation of sustainability issues into the cost effectiveness analysis for home sprinkler systems provided a broader insight into the overall costs and benefits, including aspects that currently have no monetary equivalent.