The Building Permit application should be filled out for anything that's not Mechanical, Electrical, or Plumbing, and should be used for residential and commerical projects. Some examples include: New houses, Structural work, Demolition work, Fire Sprinklers (stand alone systems), Fire Alarms, Fire Suppression, etc. If you have any questions on which applications to complete, please feel free to contact us, we're here to help.