The typical asking rate per listing is in the $10's per square foot per year. The Warwick region is experiencing a a boost in rates. In the last 3 months, the median rate increased $3 per sqft per year. That's a 15% rise in rent.
Compared to the rest of the Greater Boston market, the Warwick region has smaller rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 37 listings have been listed, which means office spaces most likley are going fast. You'll want to be prepared to make an offer immediately. About 3% of the available space in the Warwick 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 1,500 sqft. Most properties in this market are close to 1 floors. Most buildings in this region were built in 1970 and are Class B.