The typical asking rate per listing is in the $10's per square foot per year. The Fort Smith region is going through a a boost in rates. In the last 3 months, the median rate increased $0 per sqft per year. That's a 2% increase in rent.
In the last 90 days, 28 listings have been posted online, which means listings most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. About 4% of the available leases in the Fort Smith are subleases, so you will probably have to consider a longer term lease. 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 2,250 sqft. Most buildings in this market are around 2 stories. Most buildings in this region were built in 1990 and are Class B.