The typical asking rate per listing is in the $20's per square foot per year. The Logan Square submarket is going through a a rise in rates. In the last 3 months, the median rate rose $22 per sqft per year.
Compared to the rest of the Philadelphia market, the Logan Square submarket has lower rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 23 listings have been posted online, which means office spaces most likley are going fast. You'll want to be prepared to make an offer immediately. About 30% of the available leases in the Logan Square are subleases, so you might be able to find a shorter term or below market rent. 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 4,990 sqft, there are still 0 leases below 2,000 sqft. Most properties in this region are approximately 27 stories. Most buildings in this market were built in 1980 and are Class A.