The typical asking rate per listing is in the $10's per square foot per year. The Spokane Valley submarket is going through a an increase in rates. In the last 3 months, the median rate rose $18 per sqft per year.
In the last 90 days, 49 listings have been posted online, so you'll want to check back regularly for new listings. About 173% of the available space in the Spokane Valley are subleases, so you might be able to snag a great spot on a short term. 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 1,400 sqft. Most buildings in this area are approximately 1 stories. Most buildings in this area were built in 1980 and are Class B.