5 Strongest and Weakest Housing Markets Residents of Boulder, Colo., should be happy By Arden Dier, Newser Staff Posted Aug 17, 2016 5:10 PM CDT 25 comments Comments House prices are soaring in Boulder. (AP Photo/Elise Amendola) (Newser) – Looking to invest in real estate? Be careful where you buy. Here are the five cities where house prices are growing and shrinking the fastest, based on average price changes for a single family home over 12 months ending this June, per 24/7 Wall St.: Growing: Boulder, Colo.: 18.5% Elmira, NY: 17.6% Springfield, Ill.: 17.1% Port St. Lucie, Fla.: 16.1% Cumberland, Md.: 15.2% Shrinking: Atlantic City, NJ: -13.1% Binghamton, NY: -10.2% Erie, Pa.: -7.9% New York City/White Plains/Jersey City: -5.9% Bridgeport, Conn.: -5.7% Click for the full lists, or see the 10 US cities losing the most jobs.