On average, listings lease in the $10's per square foot per year. The Gresham submarket is experiencing a decrease in rates. In the last 3 months, the median rate fell $3 per sqft per year. That's a 18% decrease in rent.
Compared to the rest of the Greater Portland market, the Gresham region has less expensive rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 3 listings have been made available, which means listings are probably going fast. You'll want to be prepared to make an offer immediately. About 33% of the available space 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 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 2,000 sqft. Most buildings in this area are approximately 2 floors. Most buildings in this area were built in 1998 and are Class B.