Whether or not you need a structural report for your building project depends on the scope of the work. You do not need a structural report if you simply install a lintel above an existing opening. However, you should notify building control of the work so that they can inspect it and ensure that it meets the code. If you are creating a new opening or altering a structural wall, you will need a structural report to obtain the correct specifications for the new RSJ. And if you own a listed building, you must apply for a listed building consent before carrying out any repair work that could alter the structure's historic fabric. Following these guidelines ensures that your building project is carried out properly and up to code.