The typical asking rate per listing is in the $30's per square foot per year. The Mukilteo submarket is going through a an increase in rates. In the last 3 months, the median rate went up $2 per sqft per year. That's a 7% increase in rent.
Compared to the rest of the Seattle Metropolitan Area market, the Mukilteo region has less expensive rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 44 listings have been listed, so you'll want to check back regularly for new listings. About 11% of the office spaces in the Mukilteo 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 1,060 sqft. Most properties in this region are around 2 floors. Most buildings in this region were built in 1990 and are Class A.