Most listings are in the $10's per square foot per year. The Yakima County region is experiencing a a rise in rates. In the last 3 months, the median rate increased $16 per sqft per year.
In the last 90 days, 12 listings have been made available, which means office spaces most likley are leasing quickly. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,140 sqft. Most properties in this area are approximately 2 stories. Most buildings in this region were built in 1993 and are Class A.