In the last 90 days, 3 listings have come on the market, which means leases most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 33% of the listings in the Rahway 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.
The standard measurement for office space in this area is around sqft. Most buildings in this region are around 2 floors. Most buildings in this region were built in 1952 and are Class B.