Most listings are in the $20's per square foot per year. The Kirkland submarket is going through a decrease in rates. In the last 3 months, the median rate fell $10 per sqft per year. That's a 27% decline in rent.
Compared to the rest of the Seattle Metropolitan Area market, the Kirkland submarket has less expensive rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 25 listings have been listed, which means office spaces most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 16% of the listings in the Kirkland 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.
Even though the median size is 4,620 sqft, there are still 0 spaces below 2,000 sqft. Most buildings in this area are around 2 floors. Most buildings in this area were built in 1987 and are Class A.