On average, listings lease in the $30's per square foot per year. The Carnegie region is experiencing a a rise in rates. In the last 3 months, the median rate went up $32 per sqft per year.
In the last 90 days, 6 listings have been posted online, which means new listings most likley are going fast. You'll want to be prepared to make an offer immediately. About 67% of the listings in the Carnegie are subleases, so you might be able to find a shorter term or below market rent. 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 22,000 sqft, there are still 0 leases below 2,000 sqft. Most properties in this market are close to 2 stories. Most buildings in this area were built in 1985 and are Class B.