Most listings are in the $10's per square foot per year. The Mukilteo region is going through a decline in rates. In the last 3 months, the median rate decreased $8 per sqft per year. That's a 33% decline in rent.
Compared to the rest of the Seattle Metropolitan Area market, the Mukilteo submarket has less expensive rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 6 listings have been listed, which means listings are probably 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 posted, so finding a space for a small business might be tough.
Even though the median size is 15,000 sqft, there are still 0 spaces below 2,000 sqft. Most buildings in this market are close to 2 stories. Most buildings in this region were built in 2001 and are Class B.