In the last 90 days, 5 listings have come on the market, which means leases most likley are going fast. You'll want to be prepared to make an offer immediately. About 20% of the office spaces in the Cambridge are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 1,000 sqft. Most buildings in this region are approximately 1 floors. Most buildings in this market were built in 1979 and are Class C.