Most listings are in the $10's per square foot per year. The Westmoreland County submarket is experiencing a a boost in rates. In the last 3 months, the median rate increased $1 per sqft per year. That's a 7% increase in rent.
In the last 90 days, 17 listings have been posted online, which means new availabilities most likley are going fast. You'll want to be prepared to make an offer immediately. About 6% of the available leases in the Westmoreland County 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,000 sqft. Most buildings in this area are approximately 2 floors. Most buildings in this region were built in 1990 and are Class B.