A: A “lot line window” is a window that is built on a side of a building that shares a boundary line with a neighboring property. If the adjacent building is built up to or higher than this window, then the lot line window will likely need to be sealed off. For this reason, lot line windows are not counted towards light and ventilation requirements.
In condominiums and cooperatives, the offering plan will generally indicate whether there are any lot line windows in the building, and if so, which apartments may be adversely affected by the lot line windows.
Important Tip: If a building has lot line windows, it can be very difficult to determine the probability of whether the lot line windows will actually be sealed off. Signs indicating that an adjacent property may be developed (i.e. vacant, adjoining lots or a rental building) could increase the probability that a lot line window may be sealed off. An architect or attorney who specializes in zoning and land use should be consulted.
Neil B. Garfinkel
REBNY Broker Counsel
Partner-in-charge of real estate and banking practices at Abrams Garfinkel Margolis Bergson, LLP