The typical asking rate per listing is in the $20's per square foot per year. The Exton submarket is seeing a a boost in rates. In the last 3 months, the median rate went up $10 per sqft per year. That's a 55% rise in rent.
In the last 90 days, 1 listings have been posted online, which means listings are probably going fast. You'll want to be prepared to tour spaces as quick as possible. About 200% of the office spaces in the Exton are subleases, so you might be able to snag a great spot on a short term. 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 500 sqft. Most properties in this market are approximately 2 floors. Most buildings in this area were built in 1980 and are Class B.