Most listings are in the $20's per square foot per year. The Allegheny County region is going through a decrease in rates. In the last 3 months, the median rate decreased $1 per sqft per year. That's a 5% decline in rent.
In the last 90 days, 529 listings have been made available, so you'll want to check back regularly for new listings. About 3% of the office spaces in the Allegheny County are subleases, so you will probably need to consider the implications of signing a direct lease with the building. 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 4,750 sqft, there are still 0 spaces below 2,000 sqft. Most properties in this area are around 3 floors. Most buildings in this market were built in 1982 and are Class B.