Most listings are in the $20's per square foot per year. The Kent submarket is experiencing a a boost in rates. In the last 3 months, the median rate increased $26 per sqft per year.
In the last 90 days, 3 listings have been made available, which means office spaces might be leasing quickly. 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 1,600 sqft. Most buildings in this market were built in 2013 and are Class A.