The typical asking rate per listing is in the $20's per square foot per year. The Kenmore region is going through a an increase in rates. In the last 3 months, the median rate went up $21 per sqft per year.
Compared to the rest of the Seattle Metropolitan Area market, the Kenmore region has lower rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 1 listings have come on the market, which means new availabilities might be going fast. You'll want to be prepared to tour spaces as quick as possible. About 100% of the office spaces in the Kenmore 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 870 sqft. Most buildings in this market were built in 1950 and are Class A.