The typical asking rate per listing is in the $10's per square foot per year. The Spokane Valley region is going through a a boost in rates. In the last 3 months, the median rate went up $18 per sqft per year.
In the last 90 days, 49 listings have been made available, so you'll want to check back regularly for new listings. About 184% of the available space in the Spokane Valley 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,400 sqft. Most properties in this area are approximately 1 stories. Most buildings in this market were built in 1980 and are Class B.