Multi-Generational Living Configuration — Granny Flats | Building Solution Australia

Concept PlanSecondary Dwellings

Multi-Generational Living Configuration

Two dwellings, one lot, one family

60 floor area2 bedrooms1 bathroom1 storey

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.

A secondary dwelling designed specifically for multi-generational family living — with a connecting door option between the main dwelling and the granny flat, shared outdoor spaces, and a privacy-focused layout. A backyard home that keeps family close while maintaining independent living. Available in one- or two-bedroom configurations. No garage — a secondary dwelling on a residential lot.

Key Features

  • Optional connecting door to main dwelling — keeps family close
  • Private separate entry — independent living maintained
  • Acoustic insulation to shared walls — Rw 45 minimum
  • Shared or divided outdoor living area
  • Fully self-contained — kitchen, bathroom, laundry
  • Australian compliant design — NCC 2022 and Housing SEPP
  • Energy-efficient — 7-star NatHERS minimum

Floor Plan

Concept Plan

Two bedrooms, open-plan living/kitchen, full bathroom, separate laundry, private entry, optional connecting door to main dwelling, shared or private outdoor area. No garage or internal car access. 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

Designed for privacy while enabling family connection. Private entry separate from main dwelling. Optional internal connecting door. Shared or divided outdoor space. Full self-contained facilities. No internal garage or car access.

External Design Options

  • Matching cladding to main dwelling — fibre cement or Colorbond
  • Complementary but distinct cladding — for visual separation
  • Shared roofline design — where structurally appropriate

Construction Method

LGS framing with factory-prefabricated wall panels, modular bathroom pod, and prefabricated kitchen unit. Designed for connection to existing main dwelling where approved.

Product Specifications

structureLGS framing to NASH Standard and AS/NZS 4600
floorConcrete slab on ground
roofColorbond steel — designed to complement main dwelling
walls externalLGS framing with fibre cement or Colorbond cladding
walls internalPlasterboard lining — acoustic batts to shared walls
insulationR2.5 wall batts, R4.0 ceiling batts — NCC 2022 compliant
windowsAluminium powder-coated — double glazed
doorsSolid-core entry door, hollow-core internal
kitchenPrefabricated kitchen unit — 600mm appliances, stone benchtop
bathroomModular bathroom pod
laundrySeparate laundry
acousticAcoustic insulation to shared walls — Rw 45 minimum
electricalSingle-phase connection, LED lighting throughout
plumbingCopper or PEX — WaterMark certified fittings
energy rating7-star NatHERS minimum — NCC 2022 compliant

Standard Finishes

  • Painted fibre cement cladding — to complement main dwelling
  • Colorbond roof
  • Stone benchtop — kitchen
  • Ceramic tiles — wet areas
  • Carpet — bedrooms
  • Hybrid flooring — living areas

Upgrade Packages

Acoustic Upgrade

Enhanced acoustic separation between dwellings — Rw 50+ to shared walls and floor

Shared Outdoor Living

Coordinated outdoor living design — shared alfresco, garden, and privacy screening

Accessibility Package

Step-free entry, wider doorways, accessible bathroom — suitable for elderly family members

Typical Applications

Extended family living — grandparents on the same lotElderly parent accommodation — ageing-in-placeAdult children returning homeShared childcare arrangementsIndependent living with family connection

Approval Considerations

Connecting doors between principal dwelling and secondary dwelling may affect the secondary dwelling classification in some states. Seek planning advice before specifying a connecting door. Multi-generational configurations are approvable as secondary dwellings in most jurisdictions.

Project Examples

  • Multi-generational living — grandparents and grandchildren — 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.