The typical asking rate per listing is in the $10's per square foot per year. The Gresham submarket is experiencing a decline in rates. In the last 3 months, the median rate fell $1 per sqft per year. That's a 4% decline 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, 3 listings have come on the market, which means office spaces most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 33% of the available leases 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 region were built in 1998 and are Class C.