On average, listings lease in the $20's per square foot per year. The Pittsburgh region is going through a an increase in rates. In the last 3 months, the median rate went up $1 per sqft per year. That's a 5% increase in rent.
In the last 90 days, 344 listings have come on the market, so you'll want to check back regularly for new listings. About 2% of the office spaces in the Pittsburgh 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 available, so finding a space for a small business might be tough.
Even though the median size is 5,500 sqft, there are still 0 leases below 2,000 sqft. Most buildings in this region are around 4 stories. Most buildings in this market were built in 1958 and are Class B.