The typical asking rate per listing is in the $10's per square foot per year. The Yellowstone County submarket is going through a a rise in rates. In the last 3 months, the median rate went up $16 per sqft per year.
In the last 90 days, 57 listings have been posted online, so you'll want to check back regularly for new listings. About 67% of the listings in the Yellowstone County 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,380 sqft. Most properties in this area are approximately 2 floors. Most buildings in this area were built in 1984 and are Class A.