Number of tenements in New York, December 1, 1888 + 

32,390 + 

Number built from June 1, 1888, to August 1, 1890 + 

3,733 + 

Rear tenements in existence, August 1, 1890 + 

2,630 + 

Total number of tenements, August 1, 1890 + 

37,316 + 

Estimated population of tenements, August 1, 1890 + 

1,250,000 + 

Estimated number of children under five years in tenements, 1890 + 

163,712 + 

Corner tenements may cover all of the lot, except 4 feet at the rear. Tenements in the block may only cover seventy-eight percent of the lot. They must have a rear yard 10 feet wide, and air-shafts or open courts equal to twelve percent of the lot. + 

Tenements or apartment houses must not be built over 70 feet high in streets 60 feet wide. + 

Tenements or apartment houses must not be built over 80 feet high in streets wider than 60 feet. + 