The typical asking rate per listing is in the $0's per square foot per year. The Kuna region is going through a decline in rates. In the last 3 months, the median rate decreased $16 per sqft per year. That's a 100% decrease in rent.
In the last 90 days, 1 listings have come on the market, which means new availabilities most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around sqft. Most buildings in this area were built in 2007 and are Class B.