In the last 90 days, 0 listings have been posted online, which means spaces most likley are going fast. You'll want to be prepared to make an offer immediately. About NaN% of the available space in the East Orange are subleases, so you will probably have to consider a longer term lease. 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 B.