Residential Tenancies (Smoke Alarms and Insulation) Regulations 2016, regs 11–16
Yes. From 1 July 2019 all rental homes must have ceiling and underfloor insulation, unless your place is an exception because it’s not reasonably practicable for insulation to be installed. (Social housing provided by the government or community providers has been required to have insulation since July 2016.)
An example of an exception is if your place is built on a concrete slab so that it’s not possible to install underfloor insulation – or if you have a “skillion” roof, where there’s no ceiling space between the ceiling and the roof where insulation could be installed.
All new tenancy agreements also have to include a separately signed “insulation statement”, covering what insulation the place has and what type it is.