In the last 90 days, 355 listings have been made available, so you'll want to check back regularly for new listings. About 5% of the available leases in the Greater Portland are subleases, so you will probably need to consider the implications of signing a direct lease with the building. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,870 sqft. Most properties in this market are close to 2 stories. Most buildings in this area were built in 1985 and are Class A.