Most listings are in the $30's per square foot per year. The Seattle submarket is going through a an increase in rates. In the last 3 months, the median rate rose $4 per sqft per year. That's a 11% rise in rent.
In the last 90 days, 466 listings have been made available, so you'll want to check back regularly for new listings. About 77% of the office spaces in the Seattle 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 3,210 sqft, there are still 0 office spaces below 2,000 sqft. Most buildings in this region are approximately 2 floors. Most buildings in this region were built in 1982 and are Class A.