On average, listings lease in the $10's per square foot per year. The Boise City submarket is going through a a boost in rates. In the last 3 months, the median rate went up $0 per sqft per year. That's a 2% increase in rent.
In the last 90 days, 434 listings have been listed, so you'll want to check back regularly for new listings. About 2% of the office spaces in the Boise City are subleases, so you will probably need to sign a longer term lease with the landlord directly. 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 2,010 sqft. Most properties in this region are around 1 floors. Most buildings in this area were built in 1989 and are Class A.