Compared to the rest of the Seattle Metropolitan Area market, the Tukwila submarket has less expensive rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 8 listings have been made available, which means leases are probably leasing quickly. You'll want to be prepared to make an offer immediately. About 13% of the available leases in the Tukwila are subleases, so you might be able to find a shorter term or below market rent. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
Even though the median size is 3,010 sqft, there are still 0 spaces below 2,000 sqft. Most properties in this market are close to 2 stories. Most buildings in this region were built in 1979 and are Class A.