Most listings are in the $10's per square foot per year. The Worcester submarket is going through a a boost in rates. In the last 3 months, the median rate went up $20 per sqft per year.
Compared to the rest of the Greater Boston market, the Worcester region has lower rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 12 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 25% of the listings in the Worcester 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 on the market, so finding a space for a small business might be tough.
Even though the median size is 5,450 sqft, there are still 0 spaces below 2,000 sqft. Most properties in this area are close to 1 stories. Most buildings in this market were built in 1986 and are Class A.