A demolition is any act or process that, in whole or in part, destroys, razes or permanently impairs the structural integrity of a building, structure, object, or site which has been designated a historic landmark.
A demolition delay for a historic landmark is a ruling by the Historic Landmark Preservation Commission, upon application for a certificate of appropriateness, which delays the granting of a demolition permit for a historic landmark property for a reasonable period of time in order to allow time for efforts to preserve the building, structures, object or site.
An automatic delay of up to 90 days may also be granted to properties considered to be eligible for designation as a historic landmark, but not so designated.
A demolition denial is a ruling by the Historic Landmark Preservation Commission, upon an application for a certificate of appropriateness, which denies a demolition permit in order to preserve the building, structure, object, or site.