On average, listings lease in the $10's per square foot per year. The Cambridge submarket is going through a a boost in rates. In the last 3 months, the median rate rose $18 per sqft per year.
In the last 90 days, 0 listings have come on the market, which means new availabilities are probably going fast. You'll want to be prepared to make an offer immediately. About Inf% of the available leases in the Cambridge 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.
Even though the median size is 3,700 sqft, there are still 0 new availabilities below 2,000 sqft. Most buildings in this area are around 1 stories. Most buildings in this market were built in 1951 and are Class A.