Most listings are in the $10's per square foot per year. The Gresham region is experiencing a decline 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 region.
In the last 90 days, 5 listings have been made available, which means spaces most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. About 20% of the available space in the Gresham are subleases, so you might be able to find a shorter term or below market rent. There aren't many listings below 2,000 square feet on the market, 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 buildings in this area are around 2 floors. Most buildings in this area were built in 1998 and are Class B.