Most listings are in the $10's per square foot per year. The Westmoreland County submarket is seeing a a rise in rates. In the last 3 months, the median rate went up $4 per sqft per year. That's a 25% rise in rent.
In the last 90 days, 18 listings have been posted online, which means new availabilities most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. About 6% of the available space in the Westmoreland County are subleases, so you will probably have to consider a longer term lease. 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 2,300 sqft. Most properties in this region are close to 2 stories. Most buildings in this market were built in 1990 and are Class B.