People have asked who the owner was of specific buildings for specific time periods. These records are searchable in person only; they do not accept mail in requests. Such records may be found at: City Register's Office NYC FInance Department--Division of Land Records 66 John Street, 13th Floor New York NY 10038 Monday-Friday, 8:30 a.m.-4:30 p.m. Deeds, mortgages, maps, 1654 to the present. Official record of real and personal property transfers. Recording Deeds & Mortgages. NOTE: Available for Manhattan, the Bronx, Brooklyn, and Queens only. The Richmond County Clerk serves this function in Staten Island. Barb IHR, GGG Researching NYC Deeds