On average, listings lease in the $30's per square foot per year. The Bonney Lake region is seeing a a rise in rates. In the last 3 months, the median rate rose $8 per sqft per year. That's a 33% rise in rent.
Compared to the rest of the Seattle Metropolitan Area market, the Bonney Lake submarket has lower rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 3 listings have come on the market, which means office spaces are probably going fast. You'll want to be prepared to make an offer immediately. About 133% of the available leases in the Bonney Lake are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 300 sqft. Most buildings in this region are around 1 floors. Most buildings in this area were built in 1999 and are Class C.