The typical asking rate per listing is in the $0's per square foot per year. The Longwood region is seeing a decline in rates. In the last 3 months, the median rate decreased $18 per sqft per year. That's a 100% decrease in rent.
In the last 90 days, 10 listings have been posted online, which means office spaces most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 10% of the listings in the Longwood are subleases, so you will probably need to consider the implications of signing a direct lease with the building. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,070 sqft. Most buildings in this market are approximately 2 stories. Most buildings in this market were built in 1984 and are Class B.