1+1 equals 2.5

Only in New York.

The New York times reported that "In New York real estate, there is a little known and somewhat mystifying equation. and that is 1+1 = 2.5"

This happens when two adjoining apartments are sold as one. The owners will combine and break down walls, ceilings, floors to create a single unit.

The market price for larger units are over 2.5 for two single units.