Short answer: the National Construction Code (NCC) class depends on how the building is used, not how it is built. A modular granny flat is typically Class 1a, a shed or amenities block Class 10a, worker rooms Class 1b or Class 3, an office Class 5, a childcare centre Class 9b and aged care Class 9c, always confirmed by your building surveyor.*
As the manufacturer, EcoPrestige is responsible for every module: built and inspected in an offsite factory to Australian engineering and QA, then delivered to site.
The classes we see most
- Class 1a: a house or granny flat. See NCC compliance for Class 1a, 2, 3 and 9b.
- Class 1b: small boarding house or guest rooms. See what is a Class 1b building.
- Class 3: workers’ quarters, motels, larger accommodation. See Class 3 vs Class 1b.
- Class 5: offices, site offices.
- Class 9b: childcare centres and classrooms.
- Class 9c: residential aged care.
- Class 10a: sheds, amenities and non-habitable buildings. See what is a Class 10a building.
Why the class matters before design starts
The class sets fire separation, access, energy and sound requirements, and in some states who may design it. That is why our ECI Stage 1 confirms the likely class with your surveyor before the grid is set. See Design to Delivery for builders and developers and, for fire ratings, fire-rated modular buildings.
Terms, approvals and building laws vary from state to state. We confirm what applies to your site before you commit.
Frequently asked questions
What NCC class is a granny flat?
Typically Class 1a, the same as a house, confirmed by your building surveyor.*
What class is modular worker accommodation?
Typically Class 1b for a small number of rooms or Class 3 for larger workers’ quarters, confirmed by your building surveyor.*
What class is a modular childcare centre?
Typically Class 9b, confirmed by your building surveyor.*
*Rules vary by state. Design and building work is carried out by the licensed or registered practitioner your state requires. Send your enquiry first so you are fully informed.