Design the ultimate Class 1a liveable shed with shed designer.

What is a Class 1a liveable shed?

A Class 1a liveable shed is a steel-framed building engineered, certified and approved as a single-occupancy dwelling under the National Construction Code. Class 1a is the same building classification as a standard family home (Australian Building Codes Board, NCC Volume Two, Class 1a single dwelling). It's the difference between a shed you can legally live in full-time, and a shed that's classified Class 10a as a non-habitable outbuilding.

ShedDesigner Class 1a liveable sheds are built from 100% Australian-made BlueScope steel, clad in Colorbond®, engineered to AS/NZS 1170.2 wind loading and AS 3959 bushfire requirements where the block is in a designated bushfire-prone area, and certified to current NCC Volume Two energy efficiency, fire safety, structural and amenity provisions.

Class 1a versus Class 10a (and why it matters)

Most "sheds with a kitchen and bed" sold in Australia are actually classified Class 10a (non-habitable) and Class 10b. Council, lender and insurer treatment is fundamentally different.

• Legal full-time occupancy. Class 1a yes. Class 10a no.
• Mortgage eligibility. Class 1a qualifies with most major lenders. Class 10a is declined or hard.
• NCC energy efficiency rating. Class 1a requires a NatHERS minimum. Class 10a has no requirement.
• Bushfire BAL assessment. Class 1a required in bushfire-prone areas. Class 10a limited.
• Insurance as a primary residence. Class 1a yes. Class 10a no.
• Council pathway. Class 1a runs a DA or CDC with most councils. Class 10a is often exempt or simpler.

Practical consequence: a Class 10a "shouse" or "barn with a bed" cannot be your nominated principal place of residence in most Australian councils, can't usually be mortgaged, and won't be insured as a home. A Class 1a shed home can. The build cost is meaningfully higher because of insulation, glazing, energy rating, sound separation and bushfire compliance, but the legal and financial pathway is the same as a brick-and-tile home.

For the lifestyle barn-style version (full home behind a barn shell), see also barndominium designs.

What Class 1a actually requires

Five compliance lines drive most of the build cost and design pathway.

Energy efficiency (NatHERS). Under NCC 2022 and as carried into NCC 2025, all new Class 1a buildings must achieve a minimum 7-star NatHERS rating, with whole-of-home energy use limits set under the same provisions (Australian Building Codes Board, NCC 2022 Volume Two, Section 13.7 Energy efficiency). Insulation, glazing, orientation and air-tightness all factor into the rating.

Structural and wind. Engineered to AS/NZS 1170.2 wind region for the actual block, with footing and connection details signed off by a structural engineer.

Bushfire (where applicable). A site in a designated bushfire-prone area requires a Bushfire Attack Level (BAL) assessment under AS 3959. Class 1a buildings must be constructed to the BAL rating of the site (BAL-LOW through BAL-FZ Flame Zone). Cladding, framing, glazing and ember mesh all change with the BAL rating.

Plumbing, glazing and amenity. Class 1a buildings carry minimum-standard provisions for natural light, ventilation, ceiling height, kitchen, bathroom and laundry layout, and weatherproofing. The shed shell is the easy part. The internal fit-out is what triggers the lender and insurer.

Approval pathway. Most Class 1a builds need a Development Application or Complying Development Certificate (state and council dependent). NSW Complying Development pathways under State Environmental Planning Policy (Exempt and Complying Development Codes) 2008 cover many Class 1a builds in residential and rural zones, where the design meets the predetermined criteria. Outside CDC, full DA applies.

Before you get quotes

100% Australian-made BlueScope steel. Structural framing and Colorbond® cladding, certified to NCC structural requirements. COLORBOND® steel roofing on residential dwellings carries BlueScope warranties of up to 36 years against corrosion to perforation, depending on location; for non-habitable shed and garage applications the warranty runs up to 15 years (BlueScope, Warranty pages). Check your build on BlueScope's online warranty estimator.

ShedSafe accredited dealers, no exceptions. Every dealer on ShedDesigner is ShedSafe accredited under the Australian Steel Institute programme, which independently assesses dealer design and engineering against the National Construction Code and AS/NZS 1170.2. For Class 1a builds, your dealer also carries the registered builder credentials needed to deliver a habitable structure and works alongside an independent NatHERS assessor and (where required) a bushfire consultant.

One design, multiple quotes. Your Class 1a shed home design goes out to dealers covering your region. Every quote prices the same shell, in the same steel, to the same engineering. Internal fit-out, glazing schedule and energy rating pathway are itemised so you can compare like for like.

Lender expectations. Class 1a engineering and certification are what most major Australian lenders require to mortgage a steel-framed home. We can't promise any specific lender, but the certification path is the one most lender policies are written against.