The typical asking rate per listing is in the $20's per square foot per year. The Federal Way region is seeing a an increase in rates. In the last 3 months, the median rate increased $21 per sqft per year.
Compared to the rest of the Seattle Metropolitan Area market, the Federal Way region 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 posted online, which means office spaces most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 250% of the available leases in the Federal Way 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,480 sqft. Most buildings in this market are close to 2 stories. Most buildings in this region were built in 1985 and are Class A.