N.Y. MRE Law § 171

§ 171. Water-closet and bath accommodations. 1. Every dwelling\narranged for permanent occupancy shall contain a water-closet in every\napartment.\n 2. The floor of every compartment, bathroom or general toilet room\nshall be made waterproof and such waterproofing shall extend six inches\nor more above the floor so that the floor can be washed or flushed out\nwithout leaking. No plumbing or plumbing fixture shall be enclosed\nwholly or in part with woodwork.\n 3. Water-closets may be placed together in a general toilet room\nprovided such water-closets are supplementary to the water-closet\naccommodations required for the exclusive use of tenants of the\ndwelling, or are solely for the use of business portions of the\ndwelling.\n 4. Every apartment arranged for permanent occupancy shall contain a\nbath or shower accessible from every bedroom without passing through any\nother bedroom. In dwellings arranged for transient occupancy there shall\nbe at least one shower or bath for every eight resident occupants.\n 5. Except as specifically provided otherwise in this chapter, every\nwater-closet compartment and bath or shower room shall have a window\nopening upon a street or upon a lawful court or yard.\n 6. In lieu of a required window or skylight, it shall be lawful to\ninstall a system of mechanical or gravity ventilation for water-closet\ncompartments or bathrooms in any portion of a dwelling. Such system of\nventilation shall be constructed, arranged and maintained continuously\nto provide at least four changes per hour of the air volume of each such\nwater-closet compartment or bathroom.\n