On average, listings lease in the $20's per square foot per year. The Greater Portland region is experiencing a decrease in rates. In the last 3 months, the median rate fell $2 per sqft per year. That's a 7% decrease in rent.
In the last 90 days, 549 listings have been made available, so you'll want to check back regularly for new listings. About 5% of the office spaces in the Greater 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,920 sqft. Most properties in this area are around 2 stories. Most buildings in this market were built in 1985 and are Class A.