Compared to the rest of the Seattle Metropolitan Area market, the Sumner submarket has smaller rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 2 listings have been made available, which means office spaces most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. About 50% of the available space in the Sumner 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 4,000 sqft, there are still 0 listings below 2,000 sqft. Most buildings in this area are around 1 stories. Most buildings in this area were built in 2001 and are Class B.