On average, listings lease in the $40's per square foot per year. The White Plains region is experiencing a a rise in rates. In the last 3 months, the median rate rose $1 per sqft per year. That's a 3% increase in rent.
In the last 90 days, 39 listings have come on the market, which means new listings most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 3% of the available space in the White Plains are subleases, so you will probably have to consider a longer term lease. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
Even though the median size is 3,700 sqft, there are still 0 new availabilities below 2,000 sqft. Most properties in this market are close to 5 stories. Most buildings in this area were built in 1978 and are Class A.