 Between 1996 and 2009, the PPCDC renovated about 300 Patterson Park rowhomes, many vacant.Since 1996, the area's vacancy rate declined from nearly twice that of the rest of Baltimore City to less than the average, the crime rate has dropped to less than half for violent offenses, and the average housing value has nearly tripled.In February 2009, the collapse of the housing market led the PPCDC to file for Chapter 11 bankruptcy protection.