On average, listings lease in the $20's per square foot per year. The Portland submarket is seeing a decrease in rates. In the last 3 months, the median rate decreased $1 per sqft per year. That's a 4% decrease in rent.
In the last 90 days, 44 listings have been posted online, so you'll want to check back regularly for new listings. About 9% of the office spaces in the Portland are subleases, so you will probably need to consider the implications of signing a direct lease with the building. 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 1,700 sqft. Most buildings in this market are approximately 3 floors. Most buildings in this market were built in 1900 and are Class B.