On average, listings lease in the $20's per square foot per year. The Old Silk Stocking submarket is seeing a an increase in rates. In the last 3 months, the median rate increased $6 per sqft per year. That's a 36% rise in rent.
In the last 90 days, 2 listings have come on the market, which means leases most likley are leasing quickly. You'll want to be prepared to make an offer immediately. 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 3,050 sqft, there are still 0 listings below 2,000 sqft. Most buildings in this area were built in 1957 and are Class B.
Not much of the real estate is used for commercial space, so it might be hard to find office space. Construction is the dominant industry in this area. Most of the folk of Old Silk Stocking work from home. Commuting between 30 and 45 minutes a day is the norm for those who opt to reside in this part of town.