The typical asking rate per listing is in the $30's per square foot per year. The Philadelphia County submarket is experiencing a a boost in rates. In the last 3 months, the median rate rose $3 per sqft per year. That's a 9% increase in rent.
In the last 90 days, 286 listings have come on the market, so you'll want to check back regularly for new listings. About 7% of the available leases in the Philadelphia 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 5,610 sqft, there are still 0 listings below 2,000 sqft. Most buildings in this area are around 6 floors. Most buildings in this region were built in 1948 and are Class A.