Most listings are in the $20's per square foot per year. The Allison Park submarket is going through a a boost in rates. In the last 3 months, the median rate rose $24 per sqft per year.
In the last 90 days, 4 listings have been posted online, which means new listings 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.
The standard measurement for office space in this area is around 1,730 sqft. Most buildings in this area are close to 3 stories. Most buildings in this market were built in 1996 and are Class C.