Where in Massachusetts have home prices dropped the most since the peak of the market?

Mostly in urban areas that have been hard-hit by foreclosures.

Median selling prices for single-family homes in communities like Brockton and Chelsea, for example, have plunged by 40 percent or more since 2005, when home prices peaked in Massachusetts, according to The Warren Group.

Foreclosures in those towns have surely helped to drag down home values.  In fact, Chelsea and Brockton are among the cities with the highest foreclosure rates in the state.

Brockton’s median home price stood at $165,000 in 2009, a 40 percent decline from $275,000 four years earlier.

And in Chelsea, the median price plummeted almost 48 percent to $168,900 from $323,250.

Here are few more towns and cities that saw steep drops in median prices from 2005 to 2009:

Lawrence (-35 percent)
Revere (-35 percent)
Everett (-36 percent)
Randolph (-36 percent)
Athol  (-39 percent)
Hyannis (-42 percent)
Roxbury  (-43 percent)
East Boston (-45 percent)
Mattapan (-47 percent)