Tax Mapping Changes (Split/Merges):
The deadline to submit any tax map change requests is MAY 1st every year to be entered on the June 1st Tentative roll.   Any map changes after that will have to wait until the next year’s Tentative Assessment Roll. 
If you are requesting a split or merge of parcels, you must complete this form and all taxes must be current as of May 1st.
Please note the following:

• For merges, all properties must be owned by the same owner.
• Splits and subdivisions require an approved Westchester County Subdivision Map.
• For a Condominium to be split into individual parcel IDs, an Offering Plan deemed “effective” by the NYS Attorney General must be provided by no later than May 1st.

Tax Map Changes Request Form