Most listings are in the $20's per square foot per year. The Wilsonville region is experiencing a decrease in rates. In the last 3 months, the median rate decreased $19 per sqft per year. That's a 48% decline in rent.
Compared to the rest of the Greater Portland market, the Wilsonville submarket has lower rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 3 listings have come on the market, which means office spaces most likley are leasing quickly. You'll want to be prepared to make an offer immediately. 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 850 sqft. Most buildings in this region are approximately 1 stories. Most buildings in this market were built in 1980 and are Class B.