The typical asking rate per listing is in the $20's per square foot per year. The Wilsonville region is going through a a boost in rates. In the last 3 months, the median rate went up $29 per sqft per year.
Compared to the rest of the Greater Portland market, the Wilsonville submarket has less expensive rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 2 listings have come on the market, which means new listings might be going fast. You'll want to be prepared to make an offer immediately. About 700% of the listings in the Wilsonville 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 390 sqft. Most buildings in this market are approximately 1 stories. Most buildings in this region were built in 1980 and are Class B.