Compared to the rest of the Seattle Metropolitan Area market, the SeaTac submarket has lower rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 5 listings have come on the market, which means new listings are probably leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 40% of the listings in the SeaTac 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 on the market, so finding a space for a small business might be tough.
Even though the median size is 3,420 sqft, there are still 0 listings below 2,000 sqft. Most buildings in this market are around 3 stories. Most buildings in this region were built in 1979 and are Class B.