N.Y.C. Admin. Code tit. 27, ch. 2 § 27-2059
Lighting and ventilation of living rooms in converted dwellings (New York City Housing Maintenance Code)
Operative Text
a. Required windows. Except as provided in subdivision c, every living room in a converted dwelling shall have at least one window opening on: (1) A street, (2) A yard or outer court which complies with the provisions of section one hundred seventy-two of the multiple dwelling law, or (3) An inner court or shaft with minimum dimensions of three feet, nine inches in width and eight feet in length. For a room located on the top story, a skylight of the dimensions required in subdivision b may be substituted for a window. b. Size of windows. (1) The total area of all windows in the room shall be at least one-tenth the floor area of such room. (2) Every required window or skylight shall be at least twelve square feet, except that if the total area of windows in the room is one-eighth of the floor area this requirement shall not apply. (3) At least one-half of every required window shall open. One-half of the skylight shall have ventilating openings, unless (a) the skylight is equipped with a minimum of one hundred and forty-four square inches of ventilation, and (b) there is at least one window in the room, and (c) the combined glazed area of the skylight and window is at least one-eighth of the floor area. (4) The top of every required window shall be at least seven feet above the floor, except that on the top story it shall be a minimum of six feet above the floor. c. Noncomplying rooms. (1) A room which is noncomplying with the minimum room size requirements of subdivision b of section 27-2074 of article four of this subchapter or with the requirements of subdivisions a and b of this section may not be occupied unless it has a single or unbroken opening of not less than thirty-two and one-half square feet into an immediately adjoining room. Such adjoining room shall have a window on a street or a yard which complies with the provisions of section one hundred seventy-two of the multiple dwelling law, except that if the dwelling is two stories or less in height, the window of such adjoining room may open on an outer court or a court not less than four feet in width extending from street to yard. (2) No room may be subdivided in any manner unless each subdivided portion meets the requirements of paragraph one of this subdivision, or of subdivision a of this section.
N.Y.C. Admin. Code §§ 27-2001 and 27-2059 establish minimum standards for natural light and ventilation in living rooms located within converted dwellings. Every such room must have at least one qualifying window—opening onto a street, compliant yard, or a court of specified dimensions—and that window must meet minimum size and openability requirements. Rooms that fall short of these standards may still be occupied only if they have a sufficiently large opening into an adjoining room that itself meets the window requirements. Subdividing any room is prohibited unless each resulting portion independently satisfies these light and ventilation rules.
Plain English — not legal advice.
Operators of converted dwellings subject to N.Y.C. Admin. Code §§ 27-2001 and 27-2059 generally ensure that every living room contains at least one window of qualifying size—at minimum twelve square feet, with at least half of it operable—positioned so its top reaches at least seven feet above the floor and opening onto an approved street, yard, or court. Compliant operators also verify that total window area equals at least one-tenth of the room's floor area before any unit is offered for occupancy. When a room cannot meet these standards on its own, operators typically confirm that a qualifying open connection of at least thirty-two and one-half square feet exists to an adjoining room with a compliant window, and they avoid subdividing rooms in any way that would leave any portion without adequate light and ventilation.
General guidance for property managers — not legal advice for your specific situation. Consult an attorney for advice on your case.
Under N.Y.C. Admin. Code §§ 27-2001 and 27-2059, tenants in converted dwellings have a right to living rooms that meet specific natural light and ventilation minimums, including windows of adequate size that partially open and face approved outdoor spaces. If a living room lacks a qualifying window or has been subdivided in a way that cuts off required light or air, that condition may constitute a housing code violation. Tenants who believe their unit does not meet these standards can document the conditions, raise the issue as a defense in housing court proceedings, file a complaint with the New York City Department of Housing Preservation and Development, or reach out to a local tenant-rights organization for general guidance on available options.
General guidance for tenants — not legal advice for your specific situation. Consult a tenant-rights organization or attorney for advice on your case.
Generated October 14, 2026 — auto-generated, not yet human-reviewed. See /transparency for methodology.
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