Most listings are in the $20's per square foot per year. The Clifton submarket is experiencing a decline in rates. In the last 3 months, the median rate fell $4 per sqft per year. That's a 14% decline in rent.
In the last 90 days, 4 listings have come on the market, which means leases are probably leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 25% of the available leases in the Clifton are subleases, so you might be able to sign a shorter term by taking over a previous 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.
The standard measurement for office space in this area is around 750 sqft. Most buildings in this market are approximately 2 floors. Most buildings in this market were built in 1970 and are Class B.