The typical asking rate per listing is in the $30's per square foot per year. The Westchester County submarket is going through a an increase in rates. In the last 3 months, the median rate rose $1 per sqft per year. That's a 4% rise in rent.
In the last 90 days, 168 listings have been listed, so you'll want to check back regularly for new listings. About 3% of the office spaces in the Westchester County are subleases, so you will probably have to consider a longer term lease. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
Even though the median size is 3,760 sqft, there are still 0 new listings below 2,000 sqft. Most properties in this area are close to 3 floors. Most buildings in this region were built in 1977 and are Class A.