The typical asking rate per listing is in the $30's per square foot per year. The Bonney Lake region is experiencing a a rise in rates. In the last 3 months, the median rate went up $32 per sqft per year.
Compared to the rest of the Seattle Metropolitan Area market, the Bonney Lake region has less expensive rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 3 listings have been listed, which means office spaces 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 800 sqft. Most properties in this market are around 3 stories. Most buildings in this area were built in 2002 and are Class A.