Castle Square Apartments is a 500 unit site located in the South End of Boston.  There are four mid-rise buildings and 19 town house buildings containing a mixture of one, two, three and four bedroom units.  There are seventeen commercial spaces that are located on the ground floor of the mid-rise buildings along Tremont Street.  The amenities include a community garden, two playgrounds, a basketball facility and one tot lot with a water sprinkler.  On site parking is available for the residents.