Most listings are in the $20's per square foot per year. The Downtown Portland region is experiencing a decline in rates. In the last 3 months, the median rate decreased $0 per sqft per year. That's a 1% decline in rent.
In the last 90 days, 26 listings have been posted online, which means new listings most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 4% of the available space in the Downtown 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,400 sqft. Most properties in this area are close to 4 stories. Most buildings in this area were built in 1900 and are Class B.
This area is fairly equally mixed residential and commercial. Waste services is the dominant industry in this area. Commute by car is the most popular way to get to work amongst Downtown Portland occupants. Commuting between 30 and 45 minutes a day is the norm for those who opt to reside in this part of town.