On average, listings lease in the $10's per square foot per year. The Yakima submarket is going through a a boost in rates. In the last 3 months, the median rate went up $1 per sqft per year. That's a 4% increase in rent.
In the last 90 days, 2 listings have been listed, which means listings are probably going fast. You'll want to be prepared to tour spaces as quick as possible. 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 2,000 sqft. Most properties in this market are approximately 2 stories. Most buildings in this area were built in 1998 and are Class A.