The typical asking rate per listing is in the $30's per square foot per year. The Multnomah County submarket is seeing a decrease in rates. In the last 3 months, the median rate fell $1 per sqft per year. That's a 2% decline in rent.
In the last 90 days, 183 listings have been posted online, so you'll want to check back regularly for new listings. About 5% of the listings in the Multnomah County are subleases, so you will probably need to sign a longer term lease with the landlord directly. 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 1,900 sqft. Most properties in this market are around 3 floors. Most buildings in this area were built in 1961 and are Class B.