On average, listings lease in the $10's per square foot per year. The Billings submarket is experiencing a decrease in rates. In the last 3 months, the median rate decreased $1 per sqft per year. That's a 5% decline in rent.
In the last 90 days, 38 listings have been listed, which means new availabilities most likley are going fast. You'll want to be prepared to make an offer immediately. About 3% of the office spaces in the Billings are subleases, so you will probably have to focus your search on direct office leases. 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 1,500 sqft. Most properties in this market are close to 2 stories. Most buildings in this region were built in 1984 and are Class A.