The typical asking rate per listing is in the $20's per square foot per year. The Bozeman region is going through a an increase in rates. In the last 3 months, the median rate went up $24 per sqft per year.
In the last 90 days, 24 listings have come on the market, which means listings most likley are going fast. You'll want to be prepared to make an offer immediately. About 79% of the available leases in the Bozeman are subleases, so you might be able to snag a great spot on a short term. 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 1,400 sqft. Most properties in this region are approximately 2 stories. Most buildings in this region were built in 1997 and are Class A.