Most listings are in the $20's per square foot per year. The Kent region is going through a decrease in rates. In the last 3 months, the median rate fell $9 per sqft per year. That's a 30% decrease in rent.
Compared to the rest of the Seattle Metropolitan Area market, the Kent submarket has lower rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 8 listings have been made available, which means spaces most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 25% of the listings in the Kent 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 available, so finding a space for a small business might be tough.
Even though the median size is 8,500 sqft, there are still 0 new availabilities below 2,000 sqft. Most buildings in this region are close to 2 floors. Most buildings in this region were built in 1986 and are Class A.