Building Solution Australia

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

Concept PlanClass 1a — Dual Occupancy

Detached Dual Occupancy

Two separate dwellings on one lot — maximum privacy

350m² 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 fully separate dwellings on a single lot — no shared walls. Maximum privacy for both households. Suitable for multi-generational living, dual income investment, or subdivision into two separate lots.

Floor Plan

Concept Plan

Principal dwelling: three to four bedrooms, two bathrooms, open-plan living, double garage, alfresco. Secondary dwelling: two bedrooms, one bathroom, open-plan living, single garage. Separate buildings on one lot. 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

Each dwelling is fully self-contained and separate. No shared walls. Separate entries, garages, and outdoor spaces. Full privacy between dwellings.

External Design Options

  • Matching cladding — unified estate appearance
  • Complementary cladding — distinct dwellings
  • Brick veneer
  • Fibre cement — painted

Construction Method

LGS framing — each dwelling constructed separately. Factory-prefabricated components throughout. Concrete slab ground floor.

Product Specifications

structureLGS framing to NASH Standard — each dwelling
party wallNot applicable — detached dwellings, no shared wall
floor groundConcrete slab on ground — each dwelling
floor upperLGS floor cassette system — each dwelling
roofColorbond steel — each dwelling
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 or double garage — 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

Torrens Title Subdivision

Design and documentation to support Torrens title subdivision — two separate lots

Landscaping Package

Coordinated landscaping for both dwellings — privacy screening, turf, planting

Solar Package

Solar PV for each dwelling — separate systems

Typical Applications

Multi-generational living — maximum privacyDual income investmentSubdivision potential — two separate lotsLarge residential lots

Approval Considerations

Detached dual occupancy requires DA and is subject to lot size, zoning, and council controls. Many councils require minimum lot sizes of 700m²+ for detached dual occupancy. Subdivision into two separate Torrens title lots requires separate approval. Seek planning advice.

Project Examples

  • Detached dual occupancy — subdivision potential — Hills District 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.