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% decline in rent.
In the last 90 days, 541 listings have been listed, so you'll want to check back regularly for new listings. About 4% of the office spaces in the Greater Portland are subleases, so you will probably have to consider a longer term lease. 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 1,810 sqft. Most buildings in this area are approximately 2 floors. Most buildings in this area were built in 1985 and are Class A.