Most listings are in the $10's per square foot per year. The Wallingford Center submarket is going through a a boost in rates. In the last 3 months, the median rate went up $15 per sqft per year.
In the last 90 days, 11 listings have been listed, which means spaces most likley are going fast. You'll want to be prepared to make an offer immediately. About 127% of the listings in the Wallingford Center 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 posted, so finding a space for a small business might be tough.
Even though the median size is 2,770 sqft, there are still 0 new availabilities below 2,000 sqft. Most buildings in this region are around 1 stories. Most buildings in this market were built in 1970 and are Class B.