Most listings are in the $0's per square foot per year. The Salem region is experiencing a decline in rates. In the last 3 months, the median rate decreased $20 per sqft per year. That's a 100% decline in rent.
In the last 90 days, 8 listings have been listed, which means new listings are probably leasing quickly. You'll want to be prepared to make an offer immediately. 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 sqft. Most buildings in this region are approximately 2 floors. Most buildings in this region were built in 1966 and are Class B.