On average, listings lease in the $30's per square foot per year. The Clackamas region is going through a an increase in rates. In the last 3 months, the median rate went up $1 per sqft per year. That's a 4% rise in rent.
Compared to the rest of the Greater Portland market, the Clackamas region has higher rates, and you'll need to pay a premium to be in this hot region.
In the last 90 days, 13 listings have been listed, which means office spaces are probably leasing quickly. You'll want to be prepared to make an offer immediately. About 8% of the available space in the Clackamas are subleases, so you will probably have to consider a longer term lease. 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 2,290 sqft. Most buildings in this area are close to 2 floors. Most buildings in this region were built in 1998 and are Class A.