Non-habitable
A non-habitable building is one not designed for people to live or sleep in. Class 10a garages, sheds, and carports are the most common residential example under the NCC.
Ask Chalkline about this →A non-habitable building is one that is not designed, constructed, or used for people to live or sleep in. Under the NCC, Class 10a covers non-habitable buildings on a residential lot: private garages, carports, sheds, and other outbuildings. Because they are non-habitable, Class 10a structures are not required to meet the insulation, ventilation, and amenity standards that apply to Class 1a dwellings.
The distinction matters practically: a garage or shed built as a Class 10a non-habitable structure that is later converted to habitable use (a granny flat, home office used for sleeping) triggers reclassification. The converted space must then meet the full Class 1a requirements for weatherproofing, insulation, ceiling heights, natural light, and ventilation before a certifier can approve occupation.
Also known as: non-habitable building, non-habitable room.
Category: Compliance and approvals.
Related
- NCC building classes, where Class 10a non-habitable buildings sit in the NCC classification system
See also
Last updated: 2026-05-09. Verified: 2026-05-09. Quarterly review for currency.