On average, listings lease in the $20's per square foot per year. The Chester County submarket is going through a decline in rates. In the last 3 months, the median rate decreased $1 per sqft per year. That's a 5% decline in rent.
In the last 90 days, 94 listings have been made available, so you'll want to check back regularly for new listings. About 4% of the available space in the Chester County are subleases, so you will probably need to consider the implications of signing a direct lease with the building. 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 2,720 sqft, there are still 0 leases below 2,000 sqft. Most buildings in this market are approximately 2 floors. Most buildings in this area were built in 1986 and are Class B.