On average, listings lease in the $30's per square foot per year. The West Linn submarket is going through a an increase in rates. In the last 3 months, the median rate went up $3 per sqft per year. That's a 8% increase in rent.
Compared to the rest of the Greater Portland market, the West Linn submarket has greater rates, and you'll have to negotiate above asking rent to be in this hot submarket.
In the last 90 days, 3 listings have been posted online, which means leases 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 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 1,630 sqft. Most buildings in this area were built in 2006 and are Class A.