Compared to the rest of the Greater Portland market, the Lake Oswego region has higher rates, and you'll have to negotiate above asking rent to be in this hot region.
In the last 90 days, 14 listings have come on the market, which means leases most likley are going fast. You'll want to be prepared to make an offer immediately. About 14% of the available space in the Lake Oswego 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 posted, so finding a space for a small business might be tough.
Even though the median size is 3,150 sqft, there are still 0 leases below 2,000 sqft. Most properties in this area are around 4 stories. Most buildings in this region were built in 1988 and are Class A.