Most listings are in the $0's per square foot per year. The South Philadelphia East submarket is going through a decline in rates. In the last 3 months, the median rate decreased $34 per sqft per year. That's a 100% decrease in rent.
In the last 90 days, 0 listings have been posted online, which means new listings are probably leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About NaN% of the listings in the South Philadelphia East 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 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 sqft. Most properties in this area are around 28 floors. Most buildings in this market were built in 1930 and are Class B.