Class 10 Buildings or Structures

Overview

This article outlines the definition and subcategories of Class 10 buildings under the National Construction Code (NCC). These are non-habitable buildings or structures commonly found in residential or rural settings.

Why This Is Important

Helps ensure non-habitable buildings are correctly classified for compliance.
Supports proper quoting and engineering processes for sheds, garages, and external structures.
Clarifies common confusion around garages and standalone outdoor structures.

What Are Class 10 Buildings or Structures?

Class 10 buildings are non-habitable and divided into three sub-classifications:

🔹 Class 10a

Non-habitable buildings including:

Sheds
Carports
Private garages

🔹 Class 10b

Structures such as:

Fences
Masts
Antennas
Retaining walls
Swimming pools
Other similar non-building elements

🔹 Class 10c

Private bushfire shelters, which are:

Structures associated with a Class 1a building
Not attached to the main dwelling

What Is a Private Garage?

A private garage may refer to any of the following:

A garage associated with a Class 1 building
A single-storey building with no more than 3 vehicle spaces
A separate single-storey garage associated with another building, housing no more than 3 vehicles

Additional Design Considerations Compared to Class 1A Buildings

From the webinar: Unlike Class 1A buildings, Class 10 structures generally require less bracing. Class 1A designs need 20% more bracing to control deflection and protect internal finishes, while Class 10 non-habitable buildings have fewer internal finish concerns and thus lower stiffness requirements. However, unbalanced bracing should still be avoided, as it can cause structural twist, even in non-habitable buildings.

Tips, Best Practices & Troubleshooting

Don’t confuse habitable sheds or workshops with Class 10a—they may require other classifications.
For carports or garages exceeding 3 vehicles or multi-storey, confirm with council or NCC reference.
Private bushfire shelters must meet specific safety standards and separation requirements.

Site Specific Engineering

Request Engineering (Site Check)