Tax Blocks - mattyschell/nyc-spatial-rolodex GitHub Wiki
The Department of Finance publishes tax blocks on the Property Information Portal. To support the Property Information Portal the Department of Finance publishes a tax block service on the NYCMaps ArcGIS Online organization. The Department of Finance also publishes these blocks in some form on the NYC Open Data Portal.
See Tax-Map for more background.
Tax Lots nest within Tax Blocks.
NYCMaps ArcGIS Online
This is what you want.
Tax block service updated monthly (stable)
Tax block service updated daily
NYC Open Data
Department of Finance Digital Tax Map collection