Most listings are in the $20's per square foot per year. The Wilsonville region is going through a decrease in rates. In the last 3 months, the median rate fell $11 per sqft per year. That's a 27% decrease in rent.
Compared to the rest of the Greater Portland market, the Wilsonville region has lower rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 2 listings have been posted online, which means new listings are probably going fast. You'll want to be prepared to tour spaces as quick as possible. About 700% of the listings in the Wilsonville are subleases, so you might be able to sign a shorter term by taking over a previous lease. There aren't many listings below 2,000 square feet available, 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 region are around 1 stories. Most buildings in this region were built in 1980 and are Class B.