block group Density
per acre		 Units
per acre		 Platted Decades
Built Up		 Primary Housing Type Neighborhood
Tract 139, Blockgroup 3 102.24 45.54 1839 1860 – 1870 single family attached Park Slope
Tract 177, Blockgroup 1 0.01 0 1865 1865 – 1873 institutional or recreational Prospect Park
Tract 213, Blockgroup 2 160.53 33.39 1860 1900 – 1950 five story apartments Crown Heights
Tract 253, Blockgroup 3 25.71 11.36 1839 1860 – 1910 two to four flats Bedford-Stuyvesant
Tract 271.01, Blockgroup 3 36.86 16.67 1839 1860 – 1890 two to four flats Bedford-Stuyvesant
Tract 274, Blockgroup 1 63.88 22.32 1900 1920 – 1940 single family detached Bensonhurst
Tract 315, Blockgroup 2 129.75 62.04 1839 1880 – 1900 two to four flats Crown Heights
Tract 336, Blockgroup 2 45.53 17.19 1900 1920 – 1950 single family attached Sea Gate
Tract 362, Blockgroup 1 156.07 53.87 1900 1920 – 1940 two to four flats Brighton Beach
Tract 377, Blockgroup 4 83.42 36.46 1839 1880 – 1910 two to four flats Bedford-Stuyvesant
Tract 435, Blockgroup 1 106.72 27.48 1840 1870 – 2000 apartments above retail Bushwick
Tract 519, Blockgroup 1 57.40 23.96 1830 1830 – 1900 two to four flats Williamsburg
Tract 886, Blockgroup 1 119.16 44.03 1870 1890 – 1910 two to four flats Brownsville
Tract 942, Blockgroup 1 19.87 7.25 1930 1652 – 1955 single family attached East Flatbush