Most listings are in the $10's per square foot per year. The Spokane Valley region is going through a decline in rates. In the last 3 months, the median rate fell $1 per sqft per year. That's a 7% decline in rent.
In the last 90 days, 49 listings have been made available, so you'll want to check back regularly for new listings. About 2% of the available leases in the Spokane Valley are subleases, so you will probably have to focus your search on direct office leases. 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 1,930 sqft. Most properties in this region are approximately 2 floors. Most buildings in this area were built in 1980 and are Class B.