Most listings are in the $10's per square foot per year. The Federal Way submarket is going through a decrease in rates. In the last 3 months, the median rate fell $4 per sqft per year. That's a 19% decline in rent.
Compared to the rest of the Seattle Metropolitan Area market, the Federal Way submarket has less expensive rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 14 listings have been made available, which means new availabilities are probably going fast. You'll want to be prepared to make an offer immediately. About 14% of the office spaces in the Federal Way 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,160 sqft. Most properties in this region are around 2 floors. Most buildings in this region were built in 1986 and are Class A.