Most listings are in the $20's per square foot per year. The Rock Springs submarket is experiencing a a boost in rates. In the last 3 months, the median rate increased $21 per sqft per year.
In the last 90 days, 9 listings have been listed, which means leases most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. 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 920 sqft. Most buildings in this area are approximately 1 floors. Most buildings in this area were built in 1985.