block group Density
per acre		 Units
per acre		 Platted Decades
Built Up		 Primary Housing Type Neighborhood
Tract 25, Blockgroup 1 87.61 32.28 1830 1940 – 1945 five story apartments Downtown Brooklyn
Tract 69, Blockgroup 2 75.92 35.2 1839 1840 – 1970 apartments above retail Boerum Hill
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 94, Blockgroup 1 119.88 37.57 1839 1900 – 1930 single family semi-detached Sunset Park
Tract 100, Blockgroup 2 160.57 47.1 1839 1900 – 1930 two to four flats Sunset Park
Tract 112, Blockgroup 4 194.80 59.48 1839 1900 – 1920 four story apartments Borough Park
Tract 139, Blockgroup 3 102.24 45.54 1839 1860 – 1870 single family attached Park Slope
Tract 145, Blockgroup 4 63.54 24.11 1839 1870 – 1900 apartments above retail Sunset Park
Tract 153, Blockgroup 2 93.66 46.15 1839 1860 – 1880 single family attached Park Slope
Tract 165, Blockgroup 2 115.57 57.5 1839 1870 – 1900 single family attached Park Slope
Tract 181, Blockgroup 1 63.79 32.7 1839 1860 – 1890 single family attached Fort Greene
Tract 185.01, Blockgroup 1 180.57 62.95 1839 1870 – 1944 five story apartments Fort Greene
Tract 224, Blockgroup 4 97.06 28.76 1839 1890 – 1910 single family attached Borough Park
Tract 225, Blockgroup 1 28.11 11.15 1839 1870 – 1890 two to four flats Crown Heights
Tract 227, Blockgroup 1 67.28 29.24 1839 1870 – 1910 apartments above retail Bedford-Stuyvesant
Tract 229, Blockgroup 4 87.57 43.44 1839 1870 – 1890 two to four flats Bedford-Stuyvesant
Tract 237, Blockgroup 2 32.31 10.29 1839 1870 – 1910 two to four flats Bedford-Stuyvesant
Tract 241, Blockgroup 3 37.26 17.19 1839 1900 – 2000 two to four flats Bedford-Stuyvesant
Tract 243, Blockgroup 1 95.25 43.15 1839 1870 – 1890 two to four flats Bedford-Stuyvesant
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 277, Blockgroup 4 122.27 45.02 1839 1870 – 1960 two to four flats Bedford-Stuyvesant
Tract 291, Blockgroup 1 53.52 25.54 1839 1880 – 1900 two to four flats Bedford-Stuyvesant
Tract 297, Blockgroup 3 75.46 37.75 1839 1870 – 1920 two to four flats Bedford-Stuyvesant
Tract 315, Blockgroup 2 129.75 62.04 1839 1880 – 1900 two to four flats 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 399, Blockgroup 3 94.91 43.96 1840 1870 – 2000 two to four flats Bushwick
Tract 403, Blockgroup 1 46.14 18.21 1840 1870 – 2000 two to four flats Bushwick
Tract 419, Blockgroup 1 111.60 33.74 1840 1870 – 2000 two to four flats Bushwick
Tract 435, Blockgroup 1 106.72 27.48 1840 1870 – 2000 apartments above retail Bushwick
Tract 447, Blockgroup 2 45.36 14.16 1840 1870 – 2000 loft conversions Bushwick
Tract 493, Blockgroup 2 162.57 55.89 1840 1840 – 1910 apartments above retail Williamsburg
Tract 505, Blockgroup 2 105.32 37.58 1840 1840 – 1910 two to four flats Williamsburg
Tract 519, Blockgroup 1 57.40 23.96 1830 1830 – 1900 two to four flats Williamsburg
Tract 533, Blockgroup 1 185.78 41.74 1839 1860 – 1880 two to four flats Williamsburg
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