In the last 90 days, 14 listings have been posted online, which means leases are probably going fast. You'll want to be prepared to make an offer immediately. About 7% of the available leases in the Marblehead are subleases, so you will probably have to consider a longer term 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 sqft. Most properties in this market are around 1 floors. Most buildings in this area were built in 1985 and are Class A.