Most listings are in the $0's per square foot per year. The Broomall region is seeing a decline in rates. In the last 3 months, the median rate fell $32 per sqft per year. That's a 100% decrease in rent.
In the last 90 days, 0 listings have come on the market, which means spaces are probably going fast. You'll want to be prepared to make an offer immediately. About NaN% of the office spaces in the Broomall are subleases, so you will probably have to focus your search on direct office leases. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around sqft. Most buildings in this area were built in 1985 and are Class B.