I copied the below info from another post made by Don_P. (makes it easier to reference from here)
This is a list of state by state status on sprinklers at this point;
http://online.wsj.com/public/resources/documents/sprinkler1221.pdf
CA has banned a greater than 40% blend of glycol antifreeze in sprinkler systems due to flammability out of the nozzle on fires. That mix wouldn't protect the piping here, or in many places.
Smoke detectors have a 99.41% rate of getting the occupants out alive. Sprinklers boost that to 99.6%. That extra .2% certainly costs alot more than the first 99%.
and FWIW here's a website devoted to the advocacy of all new residential construction requiring sprinklers.
http://www.residentialfiresprinklers.com/blog/firesafety/ (http://www.residentialfiresprinklers.com/blog/firesafety/)
Thanks for the update . . . Last I heard that Texas would require the installation by 2012. The chart indicates that it has not been adopted. A new construction saving for me of about $3000.
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