The typical asking rate per listing is in the $20's per square foot per year. The Rock Springs submarket is experiencing a an increase in rates. In the last 3 months, the median rate rose $21 per sqft per year.
In the last 90 days, 9 listings have been listed, which means listings are probably leasing quickly. You'll want to be prepared to make an offer immediately. About 11% of the available leases in the Rock Springs are subleases, so you might be able to sign a shorter term by taking over a previous 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 560 sqft. Most buildings in this area are close to 1 floors. Most buildings in this market were built in 2004 and are Class A.