Most listings are in the $10's per square foot per year. The Tukwila region is going through a decrease in rates. In the last 3 months, the median rate decreased $11 per sqft per year. That's a 40% decline in rent.
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 discounted submarket.
In the last 90 days, 6 listings have been listed, which means new availabilities are probably going fast. You'll want to be prepared to tour spaces as quick as possible. About 17% of the office spaces in the Tukwila are subleases, so you might be able to snag a great spot on a short term. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
Even though the median size is 10,730 sqft, there are still 0 new listings below 2,000 sqft. Most properties in this area are around 2 floors. Most buildings in this region were built in 1978 and are Class A.