The typical asking rate per listing is in the $20's per square foot per year. The Rhode Island region is going through a a rise in rates. In the last 3 months, the median rate went up $0 per sqft per year. That's a 1% rise in rent.
In the last 90 days, 229 listings have been listed, so you'll want to check back regularly for new listings. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,650 sqft. Most buildings in this market are around 2 floors. Most buildings in this region were built in 1941 and are Class B.