Designing primary structure, the weathertight elements, or fire safety systems on residential buildings may be classified as “Restricted Building Work” (RBW). You must be a Licensed Building Practitioner in the design class or a Registered Architect or Chartered Professional Engineer to do or supervise this type of work.

You still have to comply with the requirements of the Building Code and apply for a building consent. You will also have to certify the RBW you design complies with the Building Code.

See the guidance on What Restricted Building Work means for Architects, Designers and Engineers.