The official tax maps for the City are maintained by the Department of Finance's Tax Map office. Tax maps show the lot lines, the block and lot numbers, the street names, lot dimensions, and easements.
Tax Map customer service is available only at the Manhattan City Register Office on the 13th floor of 66 John Street, New York, NY 10038.
You can also access Finance's Digital Tax Maps online for this information:
For technical assistance with the Digital Tax Maps, call (212) 487-6300.