In the last 90 days, 0 listings have come on the market, which means leases most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About NaN% of the listings in the Portland are subleases, so you will probably have to focus your search on direct office leases. 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 sqft. Most properties in this region are approximately 1 stories. Most buildings in this region were built in 1974 and are Class B.