100% ENERGY STAR homes + more* - results in up to 27% in energy savings , New homes for sale in Capitol Heights, Maryland located blocks away from the Addison Road Metro Station , 10 miles from Washington DC and minutes from I-495 for easy commuting access , Near Fedex Field, Boulevard at Capital Centre, National Harbor and University of Maryland , Single family homes and townhomes range in square footage from 1,804 to 2,967 sq. ft. .