The typical asking rate per listing is in the $30's per square foot per year. The Center City submarket is going through a decrease in rates. In the last 3 months, the median rate decreased $1 per sqft per year. That's a 2% decline in rent.
Compared to the rest of the Philadelphia market, the Center City region has more expensive rates, and you'll have to negotiate above asking rent to be in this hot region.
In the last 90 days, 219 listings have been made available, so you'll want to check back regularly for new listings. About 7% of the available leases in the Center City 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 on the market, so finding a space for a small business might be tough.
Even though the median size is 5,500 sqft, there are still 0 spaces below 2,000 sqft. Most buildings in this area are approximately 20 floors. Most buildings in this region were built in 1930 and are Class A.