On average, listings lease in the $0's per square foot per year. The Canonsburg region is seeing a decrease in rates. In the last 3 months, the median rate fell $19 per sqft per year. That's a 100% decline in rent.
In the last 90 days, 6 listings have come on the market, which means new listings are probably going fast. 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 sqft.