Most listings are in the $50's per square foot per year. The Waltham region is going through a an increase in rates. In the last 3 months, the median rate rose $51 per sqft per year.
Compared to the rest of the Greater Boston market, the Waltham submarket has higher rates, and you'll need to pay a premium to be in this hot submarket.
In the last 90 days, 28 listings have been posted online, which means office spaces most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. About 14% of the available space in the Waltham 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 on the market, so finding a space for a small business might be tough.
Even though the median size is 5,700 sqft, there are still 0 new availabilities below 2,000 sqft. Most buildings in this area are close to 4 stories. Most buildings in this area were built in 1981 and are Class A.