The typical asking rate per listing is in the $20's per square foot per year. The New Rochelle submarket is seeing a a boost in rates. In the last 3 months, the median rate rose $26 per sqft per year.
In the last 90 days, 8 listings have been posted online, which means spaces are probably going fast. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,200 sqft. Most buildings in this area are close to 2 floors. Most buildings in this market were built in 1954 and are Class A.