On average, listings lease in the $20's per square foot per year. The Mountlake Terrace region is going through a decrease in rates. In the last 3 months, the median rate fell $4 per sqft per year. That's a 12% decline in rent.
Compared to the rest of the Seattle Metropolitan Area market, the Mountlake Terrace region has lower rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 0 listings have been posted online, which means listings most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About Inf% of the available leases in the Mountlake Terrace 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 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 1,160 sqft. Most properties in this region are close to 3 floors. Most buildings in this region were built in 1987 and are Class A.