Three-Bedroom 80
Eighty square metres is the 60 m² design with one more structural bay: the bedrooms grow, an ensuite joins the family bathroom, and the living room gains the width a family actually uses. It sits above the Victorian exemption, so it is the plan for owners whose lot or state makes the planning pathway workable — and who want the second bathroom.
- Floor area
- 80 m²
- Bedrooms
- 3
- Bathrooms
- 2 (one ensuite)
- Laundry
- Dedicated
- Classification
- NCC Class 1a
- Typical site time
- 3–7 weeks, by delivery method
Three bedrooms, two bathrooms (one an ensuite), open-plan kitchen and living, and a dedicated laundry, on the same engineered slab and Class 1a footing as the 60 m².
Structurally the same roof line, cladding and window family — the render on this page is the 60 m² design extended by one bay, which is exactly how the drawings are derived.
In Victoria an 80 m² second dwelling needs a planning permit in most zones; in Queensland the council scheme decides, and several SEQ councils allow secondary dwellings of this size. The pathway and its timing are confirmed in writing at feasibility.
- —Town-planning assessment and, where required, the planning permit application
- —Building permit and building surveyor fees
- —Engineered reinforced concrete slab with termite management
- —Timber frame, roof, cladding, insulation and waterproofing
- —Kitchen with full-height pantry, two bathrooms, laundry, flooring and painting
- —Split-system air conditioning and hot water
- —Plumbing and electrical, connected to existing mains within a stated allowance
- —Double-glazed aluminium windows and sliding door
- —Handover with occupancy certificate
- Roofing
- BlueScope Colorbond® steel, Lysaght Klip-Lok 700 concealed-fix
- Cladding
- James Hardie Scyon™ Axon™ fibre cement, non-combustible
- Frame
- Australian MGP10 H2 termite-treated pine to AS 1684
- Insulation
- CSR Bradford Gold walls and ceiling
- Windows
- Double-glazed aluminium, AS 2047
- Benchtop
- Silica-free — engineered stone has been prohibited nationally since 1 July 2024
Three-Bedroom 80
Victoria
Above the 60 m² small second dwelling exemption, so a planning permit is required in most residential zones in addition to the building permit. Typical assessment runs months rather than weeks; we confirm the zone, overlays and likely timing for your lot before contract.
New South Wales
Secondary dwellings under the Housing SEPP 2021 are capped at 60 m² (or 20% of the principal dwelling). An 80 m² dwelling is assessed as a development application under the council LEP, or as a dual occupancy where the lot qualifies.
Queensland
The council planning scheme sets the secondary dwelling size cap — Brisbane 80 m², Logan and Ipswich larger, Moreton Bay and Sunshine Coast smaller — plus a building approval by a QBCC-licensed certifier. This plan was drawn for the SEQ councils that allow it.
Is this just the 60 with a room added?
Structurally, yes — one more bay on the same roof line — and that is deliberate: the engineering, the material kit and the prefab modules are already proven on the 60. What changes for the tenant is real: larger bedrooms, a second bathroom, and a living room a family can use.
Do I need a planning permit?
In Victoria, in most residential zones, yes — this plan is above the 60 m² exemption. Queensland depends on the council cap; New South Wales assesses it as a development application. Feasibility answers it for your lot in writing before you commit.
Which delivery method?
All three. As prefab it arrives as two modules; as a kit or a local build the extra bay is simply one more frame section. The choice is made at feasibility from your site access and programme.
See it on your lot
Send the address. The feasibility read tells you whether this plan fits, which approval pathway applies and which delivery method suits the site.