In the last 90 days, 2 listings have been posted online, which means spaces might be going fast. You'll want to be prepared to make an offer immediately. About 50% of the available leases in the Helena 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 sqft. Most properties in this region are close to 3 floors. Most buildings in this market were built in 2000.