On average, listings lease in the $10's per square foot per year. The Salem submarket is going through a an increase in rates. In the last 3 months, the median rate rose $1 per sqft per year. That's a 5% increase in rent.
In the last 90 days, 91 listings have been made available, so you'll want to check back regularly for new listings. About 52% of the available space in the Salem are subleases, so you might be able to find a shorter term or below market rent. 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 1,190 sqft. Most properties in this region are approximately 2 floors. Most buildings in this market were built in 1984 and are Class A.