On average, listings lease in the $30's per square foot per year. The Clackamas region is experiencing a an increase in rates. In the last 3 months, the median rate rose $1 per sqft per year. That's a 4% increase in rent.
Compared to the rest of the Greater Portland market, the Clackamas submarket has greater rates, and you'll need to pay a premium to be in this hot region.
In the last 90 days, 13 listings have been posted online, which means leases most likley are going fast. 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 area were built in 1998 and are Class A.