The typical asking rate per listing is in the $10's per square foot per year. The Missoula County region is seeing a a rise in rates. In the last 3 months, the median rate went up $20 per sqft per year.
In the last 90 days, 63 listings have been posted online, so you'll want to check back regularly for new listings. About 24% of the listings in the Missoula County are subleases, so you might be able to find a shorter term or below market rent. 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 2,040 sqft. Most buildings in this area are around 2 stories. Most buildings in this area were built in 1971 and are Class C.