Most listings are in the $20's per square foot per year. The Spokane County submarket is experiencing a a rise in rates. In the last 3 months, the median rate increased $2 per sqft per year. That's a 11% rise in rent.
In the last 90 days, 106 listings have been made available, so you'll want to check back regularly for new listings. About 3% of the available space in the Spokane 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,630 sqft. Most buildings in this market are close to 2 floors. Most buildings in this market were built in 1978 and are Class B.