block group Density
per acre		 Units
per acre		 Platted Decades
Built Up		 Primary Housing Type Neighborhood
Tract 5, Blockgroup 2 112.83 72.7 1816 1820 – 1900 four story apartments Brooklyn Heights
Tract 145, Blockgroup 4 63.54 24.11 1839 1870 – 1900 apartments above retail Sunset Park
Tract 165, Blockgroup 2 115.57 57.5 1839 1870 – 1900 single family attached Park Slope
Tract 291, Blockgroup 1 53.52 25.54 1839 1880 – 1900 two to four flats Bedford-Stuyvesant
Tract 315, Blockgroup 2 129.75 62.04 1839 1880 – 1900 two to four flats Crown Heights
Tract 519, Blockgroup 1 57.40 23.96 1830 1830 – 1900 two to four flats Williamsburg
Tract 553, Blockgroup 2 77.12 33.85 1830 1830 – 1900 two to four flats Williamsburg
Tract 874.01, Blockgroup 1 71.75 33.45 1890 1870 – 1900 high-rise apartments East Flatbush