According to the Arizona Republic and WP Carey School of Business at ASU in today’s paper (3/24/13), EVERY Zip code in the county saw a minimum of an 11% increase in the median sales price. Check out some of these links below. There are now mail carrier routes added to the zip code to give more specific details on an area.
http://www.azcentral.com/realestate/homevalues/mcr.php
http://www.azcentral.com/realestate/homevalues/homevalues.php
www.money.azcentral.com
If you are interested in more information please let me know.