Most listings are in the $10's per square foot per year. The Gresham submarket is going through a decrease in rates. In the last 3 months, the median rate fell $3 per sqft per year. That's a 14% decrease in rent.
Compared to the rest of the Greater Portland market, the Gresham submarket has lower rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 5 listings have been posted online, which means office spaces might be going fast. You'll want to be prepared to tour spaces as quick as possible. About 20% of the listings in the Gresham 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,030 sqft. Most properties in this market are close to 2 stories. Most buildings in this area were built in 1998 and are Class B.