On average, listings lease 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 $3 per sqft per year. That's a 13% decline in rent.
In the last 90 days, 21 listings have come on the market, which means new listings most likley are leasing quickly. You'll want to be prepared to make an offer immediately. 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 1,450 sqft. Most properties in this region are around 2 floors. Most buildings in this region were built in 1984 and are Class A.