On average, listings lease in the $20's per square foot per year. The Malden region is seeing a an increase in rates. In the last 3 months, the median rate went up $29 per sqft per year.
Compared to the rest of the Greater Boston market, the Malden submarket has higher rates, and you'll have to negotiate above asking rent to be in this hot region.
In the last 90 days, 19 listings have been listed, which means office spaces most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. 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 750 sqft. Most properties in this area are around 4 floors. Most buildings in this market were built in 1920 and are Class B.