The typical asking rate per listing is in the $10's per square foot per year. The Yellowstone County submarket is experiencing a decline in rates. In the last 3 months, the median rate fell $1 per sqft per year. That's a 5% decline in rent.
In the last 90 days, 38 listings have been made available, which means listings might be going fast. You'll want to be prepared to make an offer immediately. About 3% of the available space in the Yellowstone County are subleases, so you will probably need to sign a longer term lease with the landlord directly. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,500 sqft. Most properties in this market are around 2 floors. Most buildings in this region were built in 1984 and are Class A.