Most listings are in the $10's per square foot per year. The Everett submarket is going through a a rise in rates. In the last 3 months, the median rate went up $1 per sqft per year. That's a 4% rise in rent.
Compared to the rest of the Seattle Metropolitan Area market, the Everett region has less expensive rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 38 listings have been listed, which means new availabilities most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,870 sqft. Most properties in this market are around 2 floors. Most buildings in this market were built in 1981 and are Class B.