What is Split Lot?
Split Lot meaning A split lot is a zoning lot located in two or more zoning districts and divided by a zoning district boundary. In most cases, zoning regulations for each district must be applied separately for each portion of the lot. Special rules for zoning lots that existed prior to 1961, or prior to any rezoning that splits a lot, can be found in Article VII, Chapter 7, of the Zoning Resolution.
reference: Glossary of Planning Terms – NYC Planning