Most listings are in the $20's per square foot per year. The Bethel Park region is going through a a rise in rates. In the last 3 months, the median rate increased $26 per sqft per year.
In the last 90 days, 2 listings have come on the market, which means new availabilities are probably going fast. You'll want to be prepared to tour spaces as quick as possible. About 250% of the available leases in the Bethel Park are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 2,600 sqft, there are still 0 new listings below 2,000 sqft. Most buildings in this area are approximately 3 floors. Most buildings in this region were built in 1986 and are Class B.