Compared to the rest of the Philadelphia market, the Northern Liberties - Fishtown submarket has less expensive rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 2 listings have been made available, which means new availabilities are probably going fast. You'll want to be prepared to make an offer immediately. About 300% of the available space in the Northern Liberties - Fishtown are subleases, so you might be able to snag a great spot on a short term. 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 4,500 sqft, there are still 0 new availabilities below 2,000 sqft. Most buildings in this area are around 4 stories. Most buildings in this area were built in 1950 and are Class B.