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 75, Blockgroup 3 45.98 21.52 1839 1840 – 1880 single family attached Gowanus
Tract 77, Blockgroup 1 64.22 35.35 1839 1840 – 1980 single family attached Gowanus
Tract 112, Blockgroup 4 194.80 59.48 1839 1900 – 1920 four story apartments Borough Park
Tract 134, Blockgroup 3 80.81 35.87 1880 1890 – 1910 single family attached Bay Ridge
Tract 153, Blockgroup 2 93.66 46.15 1839 1860 – 1880 single family attached Park Slope
Tract 171, Blockgroup 3 51.72 23.85 1870 1900 – 1950 single family attached Windsor Terrace
Tract 181, Blockgroup 1 63.79 32.7 1839 1860 – 1890 single family attached Fort Greene
Tract 253, Blockgroup 3 25.71 11.36 1839 1860 – 1910 two to four flats Bedford-Stuyvesant
Tract 284, Blockgroup 3 86.22 31.81 1880 1880 – 1910 two to four flats Bath Beach
Tract 335, Blockgroup 3 52.63 14.06 1890 1910 – 1930 single family detached Crown Heights
Tract 377, Blockgroup 4 83.42 36.46 1839 1880 – 1910 two to four flats Bedford-Stuyvesant
Tract 393, Blockgroup 1 71.49 23.98 1839 1870 – 2000 two to four flats Bushwick
Tract 492, Blockgroup 3 79.79 31.8 1870 1920 – 1960 apartments above retail Kensington
Tract 508, Blockgroup 4 341.80 108.85 1870 1880 – 1930 four story apartments Flatbush
Tract 539, Blockgroup 2 200.60 47.2 1839 1970 – 1975 five story apartments Williamsburg
Tract 553, Blockgroup 2 77.12 33.85 1830 1830 – 1900 two to four flats Williamsburg
Tract 554, Blockgroup 3 78.47 28.33 1900 1900 – 1920 two to four flats Sheepshead Bay
Tract 571, Blockgroup 2 155.85 63.1 1850 1860 – 1890 apartments above retail Greenpoint
Tract 650, Blockgroup 1 39.91 15.35 1900 1800 – 1930 single family detached Flatlands
Tract 804, Blockgroup 2 121.55 49.79 1860 1880 – 1910 five story apartments Prospect-Lefferts Gardens
Tract 860, Blockgroup 3 107.23 35.7 1890 1920 – 1930 single family detached East Flatbush
Tract 874.01, Blockgroup 1 71.75 33.45 1890 1870 – 1900 high-rise apartments East Flatbush
Tract 884, Blockgroup 1 141.67 54.69 1870 1890 – 1910 apartments above retail Brownsville
Tract 900, Blockgroup 3 91.75 31.94 1870 1890 – 1910 two to four flats Brownsville