On average, listings lease in the $10's per square foot per year. The Billings region is going through a a boost in rates. In the last 3 months, the median rate increased $4 per sqft per year. That's a 23% rise in rent.
In the last 90 days, 45 listings have been listed, so you'll want to check back regularly for new listings. About 122% of the available leases in the Billings 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 2,390 sqft. Most properties in this area are around 2 stories. Most buildings in this area were built in 1979 and are Class A.