The Manhattan records in this catalog divide into two practical building groups: prewar apartment and taller facade programs, and townhouse or rowhouse work. The recorded addresses reach from Greenwich Village and SoHo to the Upper East and Upper West Sides, Harlem, Hamilton Heights, and Washington Heights, so one borough label does not imply one construction system.
For ironwork, determine what is wrought iron, cast iron, or steel, then define retained sections, replicas, connections, corrosion treatment, coatings, and masonry anchors.
The current intersection lists 4 contractors that offer this work and have separate local evidence. Within that set, 0 contractors have this service named on projects at 0 confirmed buildings. These are catalog observations, not a description of every building in Manhattan.
See the complete Manhattan contractor hub for other services, companies, and local building context.