In the last 90 days, 56 listings have been made available, so you'll want to check back regularly for new listings. About 9% of the available space in the Portland are subleases, so you will probably need to sign a longer term lease with the landlord directly. 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 1,630 sqft. Most properties in this area are close to 3 floors. Most buildings in this region were built in 1900 and are Class B.