ALT2: Multiple types of work, not affecting use, egress or occupancy.ALT1: Major alterations that will change use, egress or occupancy.The primary permit applications are: New Building (NB) and Alterations Type-1, 2, and 3: There are many permit types, such as construction, boiler, elevator and plumbing. Most often, a New York State licensed Professional Engineer (PE) or Registered Architect (RA) must file plans and pull permits before work begins. The majority of construction requires a Department of Buildings permit.