The typical asking rate per listing is 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 $2 per sqft per year. That's a 11% decrease in rent.
Compared to the rest of the Greater Portland market, the Gresham region has lower rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 13 listings have been posted online, which means new listings most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. 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 1,330 sqft. Most buildings in this market are approximately 2 floors. Most buildings in this market were built in 1998 and are Class B.