On average, listings lease in the $10's per square foot per year. The Post Falls submarket is seeing a decrease in rates. In the last 3 months, the median rate decreased $2 per sqft per year. That's a 10% decrease in rent.
In the last 90 days, 12 listings have been posted online, which means new availabilities most likley are going fast. You'll want to be prepared to make an offer immediately. 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 1,850 sqft. Most buildings in this market are around 1 floors. Most buildings in this market were built in 1979 and are Class B.