Building Solution Australia

Attached Dual Occupancy — Duplex and Dual Occupancy | Building Solution Australia

Concept PlanClass 1a — Dual Occupancy

Attached Dual Occupancy

Two dwellings attached — one lot, two incomes

320m² floor area5 bedrooms3 bathrooms2 car spaces2 storeys

Concept Plan — this floor plan is for illustrative purposes only. It does not represent an approved design. Subject to design development, engineering, and planning approval.

Two dwellings attached by a common wall on a single lot — typically a principal dwelling at the front and a secondary dwelling at the rear, connected by a shared wall or garage. Suitable for multi-generational living or dual income investment.

Floor Plan

Concept Plan

Principal dwelling: three to four bedrooms, two bathrooms, open-plan living, double garage. Secondary dwelling: one to two bedrooms, one bathroom, open-plan living, single garage or parking. Attached by shared wall. Separate entries. Dimensions indicative only.

Concept Plan — indicative layout only, subject to design development and approval

Concept Plan — indicative layout only, subject to design development and approval

Internal Layout

Principal and secondary dwellings are fully self-contained. Shared wall with acoustic and fire separation. Separate entries and outdoor spaces.

External Design Options

  • Matching cladding — unified appearance
  • Complementary cladding — distinct but coordinated
  • Brick veneer
  • Fibre cement — painted

Construction Method

LGS framing with shared party wall. Factory-prefabricated components throughout. Concrete slab ground floor.

Product Specifications

structureLGS framing to NASH Standard
party wallLGS framing with acoustic and fire separation — FRL 60/60/60, Rw 50 minimum
floor groundConcrete slab on ground
floor upperLGS floor cassette system
roofColorbond steel
walls externalLGS framing with brick veneer or fibre cement
walls internalPlasterboard lining — 10mm
insulationR2.5 wall batts, R4.0 ceiling batts — NCC 2022 compliant
windowsAluminium powder-coated — double glazed
kitchensPrefabricated kitchen units — each dwelling
bathroomsModular bathroom pods — each dwelling
laundrySeparate laundry — each dwelling
garageSingle garage or carport — each dwelling
electricalSeparate metering — each dwelling
plumbingSeparate services — each dwelling
energy rating7-star NatHERS minimum — each dwelling

Standard Finishes

  • Brick veneer or painted fibre cement
  • Colorbond roof
  • Stone benchtops
  • Hybrid flooring — living areas
  • Carpet — bedrooms
  • Ceramic tiles — wet areas

Upgrade Packages

Acoustic Upgrade

Enhanced acoustic separation — Rw 55+ to shared wall

Accessibility Package

Accessible secondary dwelling — step-free, wider doorways, accessible bathroom

Strata Subdivision

Design and documentation to support strata subdivision

Typical Applications

Multi-generational livingDual income investmentOwner-occupier plus rentalExtended family accommodation

Approval Considerations

Attached dual occupancy requires DA in most jurisdictions. The definition of 'attached' varies by state and council. Seek planning advice for your specific site and intended configuration.

Project Examples

  • Attached dual occupancy — multi-generational living — Parramatta NSW

Important Notice

All floor plans, specifications, and product information are indicative only and subject to change without notice. Concept plans and indicative layouts are for illustrative purposes only and do not represent approved designs. Final designs are subject to design development, structural engineering, services coordination, and planning and building approval. Building Solution Australia does not guarantee that any product can be approved or constructed on any specific site without site-specific assessment. Consult a qualified building professional and your relevant planning authority before making any decisions based on this information.