On average, listings lease in the $10's per square foot per year. The Carbon County region is going through a an increase in rates. In the last 3 months, the median rate increased $1 per sqft per year. That's a 7% rise in rent.
In the last 90 days, 5 listings have been posted online, which means new listings are probably leasing quickly. 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 1,000 sqft. Most buildings in this market are close to 1 floors. Most buildings in this area were built in 1950 and are Class B.