Amenity provisions (NCC)

Amenity provisions are the NCC requirements for a habitable room’s livability: minimum ceiling height, natural light, and ventilation. A non-habitable space does not have to meet them until it is reclassified for habitable use.

The NCC sets a baseline for spaces people live in, so a habitable room is genuinely usable, not just enclosed. The core amenity requirements are:

• Ceiling height: a minimum height for habitable rooms (commonly 2.4 m for living areas, with lower allowances for parts of the room and for non-habitable spaces).
• Natural light: a minimum glazed area to outdoor light for habitable rooms (a percentage of floor area), or compliant artificial light where natural light cannot be achieved.
• Ventilation: a minimum openable area for natural ventilation (commonly 5% of floor area), or mechanical ventilation.

These apply to habitable rooms (bedrooms, living rooms, kitchens, studies). Non-habitable spaces, a garage, a shed, a bathroom or laundry, are held to less (or different) requirements, which is exactly why turning one into a habitable room triggers an upgrade.

For a builder the practical points are to check ceiling height, light, and ventilation against the amenity provisions at the design and window-schedule stage, room by room, because they are common occupancy-certificate fail points. A converted garage, a roof-space room, or an internal “study” with no window is where amenity provisions bite: a room called habitable on the plans must actually achieve the ceiling height, the glazed light area, and the openable ventilation, or it cannot be signed off as habitable.

Also known as: Habitable room amenity, livability provisions.

Category: Building / Amenity.

Related

• Habitable room
• NCC building classes

See also

• Openable area
• Reclassification

References

• Habitable room (Chalkline) (verified 2026-06-01)

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Last updated: 2026-06-01. Verified: 2026-06-01. Quarterly review for currency.