The typical asking rate per listing is in the $30's per square foot per year. The Williston region is going through a a boost in rates. In the last 3 months, the median rate increased $11 per sqft per year. That's a 50% rise in rent.
In the last 90 days, 9 listings have been made available, which means leases most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 33% of the listings in the Williston 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 on the market, so finding a space for a small business might be tough.
Even though the median size is 3,280 sqft, there are still 0 new listings below 2,000 sqft. Most buildings in this area were built in 2011 and are Class A.