On average, listings lease in the $10's per square foot per year. The Spokane submarket is experiencing a a boost in rates. In the last 3 months, the median rate rose $1 per sqft per year. That's a 7% increase in rent.
In the last 90 days, 98 listings have been posted online, so you'll want to check back regularly for new listings. 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 1,590 sqft. Most properties in this area are approximately 2 floors. Most buildings in this area were built in 1967 and are Class B.