Access to private residences (Class 1a buildings) and the accessibility of the internal parts of flats or apartments (Class 2 buildings) are generally not subject to the DDA and are therefore not addressed by the Premises Standards.
Those responsible for private residences, however, are encouraged to consider the design guidelines issued by Livable Housing Australia www.livablehousingaustralia.org.au/
Be warned that State Legislation is in place which, in NSW for instance, imposes obligations on developers to provide diversity including Adaptable Housing and Livable Housing.