The typical asking rate per listing is in the $20's per square foot per year. The Oregon region is seeing a a rise in rates. In the last 3 months, the median rate rose $1 per sqft per year. That's a 5% rise in rent.
In the last 90 days, 404 listings have come on the market, so you'll want to check back regularly for new listings. About 5% of the office spaces in the Oregon are subleases, so you will probably have to consider a longer term lease. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,890 sqft. Most properties in this market are close to 2 stories. Most buildings in this market were built in 1985 and are Class A.