Most listings are in the $30's per square foot per year. The Philadelphia County submarket is experiencing a decline in rates. In the last 3 months, the median rate fell $4 per sqft per year. That's a 10% decline in rent.
In the last 90 days, 308 listings have been made available, so you'll want to check back regularly for new listings. About 6% of the listings 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 5,500 sqft, there are still 0 office spaces below 2,000 sqft. Most buildings in this market are approximately 6 floors. Most buildings in this area were built in 1950 and are Class A.