In the last 90 days, 0 listings have been made available, which means listings most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About NaN% of the office spaces in the East Orange 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 region are close to 3 floors. Most buildings in this area were built in 1970 and are Class A.