At the turn of the 20th century, New York City passed one of its most influential housing laws: the 1901 Tenement House Act, which remains the basis of New Yorks low-rise housing regulations. The law sought to address overcrowded living conditions caused by the unprecedented population boom of the 1800s.

This year, New York’s population topped 8.5 million for the first time. And according to the Citizens Housing and Planning Council, nearly 50 percent of New Yorkers are now estimated to be singlebut studios, the ideal form of housing for single residents, only make up seven percent of New Yorks housing stock.

Read more in Curbed.