On average, listings lease in the $10's per square foot per year. The Gallatin County region is going through a decline in rates. In the last 3 months, the median rate fell $6 per sqft per year. That's a 24% decrease in rent.
In the last 90 days, 18 listings have come on the market, which means spaces most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. 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 1,950 sqft. Most properties in this area are around 2 floors. Most buildings in this region were built in 2001 and are Class A.