Most listings are in the $10's per square foot per year. The Exton region is seeing a a boost in rates. In the last 3 months, the median rate increased $18 per sqft per year.
In the last 90 days, 1 listings have come on the market, which means spaces might be 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 2,330 sqft. Most properties in this market are around 2 floors. Most buildings in this market were built in 1970 and are Class B.