Mandatory Part (MP) 4.4 of the Queensland Development Code (QDC) commenced on 1 September 2010 and applies to building work for the construction or renovation of a residential building in a designated transport noise corridor. MP4.4 seeks to ensure that the habitable rooms of Class 1, 2, 3 and 4 buildings located in a transport noise corridor are designed and constructed to reduce transport noise. Transport noise corridor means land designated under Chapter 8B of the Building Act 1975 as a transport noise corridor.

Information about transport noise corridors is available at State and Local Government offices. A free online search tool can be used to find out whether a property is located in a designated transport noise corridor. This tool is available at the Department Infrastructure, Local Government and Planning website and allows searches on a registered lot number and/or property address to determine whether and how the QDC applies to the land.