Four to eleven or twelve story buildings. Former commercial buildings converted to apartments. Large open space. Usually elevator with exception of few doorman buildings. Most are found in lower Manhattan in Soho, Tribeca or Chelsea.
Most lofts are co-ops.
Twenty to forty or more floors. Full or part-time doorman. The more luxurious buildings also have a concierge that provides services such as receiving laundry and packages. Ten to thirty floors. Doorman or non-doorman.