Between 45,000 and 90,000 habitable New York City apartments are being kept deliberately vacant ("warehoused") by the speculators who own them. Most of these apartments have reasonable rents, affordable by middle- and low-income families. Meanwhile, the housing crisis for poor New Yorkers has grown steadily worse. As many as 75,000 people are homeless, and another 100,000 families are at a severe risk of becoming homeless. Warehousing occurs most often in the following situations: (1) co-op and condominium conversion; and (2) sale or demolition, both of which are more lucrative than renting at low rates. Warehousing can be stopped by eliminating the financial incentive to warehouse. New York City needs an anti-warehousing law that will make it unprofitable for owners to keep apartments vacant. This law should do the following: (1) require landlords to make an effort to rent apartments within a reasonable period of time; and (2) to make it illegal to reduce building services, vandalize an apartment or building, or engage in other actions that may discourage new renters or drive away existing tenants. Seattle, Washington, and several cities in New Jersey have enacted anti-warehousing laws, and anti-warehousing bills have been pending before the State Legislature and the New York City Council for the past two years. Synopses and texts of these laws and pending bills are provided in appendices. Other appendices present "The Uses and Limits of Rent Regulation" by Peter Marcuse, and "Housing in New York, 1984" by Michael Stegman, both of which provide statistical data on charts and figures. (BJV)