The typical asking rate per listing is in the $10's per square foot per year. The Canyon County region is going through a decrease in rates. In the last 3 months, the median rate decreased $2 per sqft per year. That's a 10% decline in rent.
In the last 90 days, 26 listings have come on the market, which means office spaces are probably going fast. You'll want to be prepared to make an offer immediately. About 4% of the office spaces in the Canyon County are subleases, so you will probably need to consider the implications of signing a direct lease with the building. 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 1,150 sqft. Most buildings in this area are approximately 1 stories. Most buildings in this area were built in 2007 and are Class B.