This is because they don't require new homes in their jurisdictions to meet the minimum national accessibility standards in the National Construction Code (NCC).
All other Australian states and territories have committed to the NCC’s minimum accessibility standards such as a step-free entrance, wider doorways, accessible bathrooms, and corridors that allow for easy movement with mobility aids, ensuring a safe and continuous path of travel throughout a dwelling.
However, the NSW and WA governments have refused to adopt the NCC standards which advocates say is creating significant problems for older people and people with disability now and into the future.