The typical asking rate per listing is in the $0's per square foot per year. The Watertown region is going through a decrease in rates. In the last 3 months, the median rate fell $18 per sqft per year. That's a 100% decline in rent.
In the last 90 days, 0 listings have come on the market, which means spaces are probably leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About NaN% of the listings in the Watertown 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 sqft. Most buildings in this market are close to 25 stories. Most buildings in this area were built in 1965 and are Class A.