A very basic idea for ensuring a more affordable housing market in NYC is to ensure that all units that already exist are occupied; whether rent controlled, rent stabilized, or market rate. The intentional warehousing of apartments by landlords represent one of the most troubling but potentially most easily resolved aspects of NYC’s housing crisis. When landlords intentionally keep rent-regulated apartments empty, it worsens the shortage of affordable housing and drives up rents throughout the city. This practice is unique among landlords of rent-stabilized units, as they may prefer to leave apartments empty rather than rent them out at the lower rates imposed on rent regulated apartments. These landlords have less of a financial incentive to rent units with low rents, where operating costs and overhead (leasing costs) may outweigh or substantially erode rental income.