Side-by-Side Duplex — Duplex and Dual Occupancy | Building Solution Australia
Side-by-Side Duplex
Two dwellings, one lot, maximum yield
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 separate dwellings on a single lot, side by side with a shared party wall. The most common duplex configuration in Australia — suitable for owner-occupier plus rental income, or full investment with two rental incomes. Designed for factory production with LGS framing and prefabricated components.
Floor Plan
Concept Plan
Each dwelling: ground floor open-plan living/dining/kitchen, powder room, single garage. Upper floor: master suite with ensuite, two secondary bedrooms, main bathroom. Shared party 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
Each dwelling is fully self-contained. Shared party wall with acoustic separation. Separate entries, garages, and outdoor spaces. Identical or mirrored floor plans.
External Design Options
- Brick veneer — matching or complementary
- Fibre cement sheet — painted finish
- Rendered masonry
- Mixed material facade
Construction Method
LGS framing with shared party wall. Factory-prefabricated wall panels, modular bathroom pods, prefabricated kitchens. Concrete slab ground floor, LGS floor cassette upper floor.
Product Specifications
Standard Finishes
- Brick veneer or painted fibre cement
- Colorbond roof
- Stone benchtops — kitchens and bathrooms
- Hybrid flooring — ground floor living
- Carpet — upper floor bedrooms
- Ceramic tiles — wet areas
Upgrade Packages
Strata Subdivision Package
Design and documentation to support strata subdivision — two separate titles
Premium Finishes
Engineered timber flooring, semi-frameless shower screens, upgraded tapware — both dwellings
Investor Package
Durable investor-grade finishes, depreciation schedule, property management setup
Typical Applications
Approval Considerations
Side-by-side duplexes require DA in most jurisdictions. Lot size, zoning, and council controls determine feasibility. Many councils require minimum lot sizes of 600m²+ for duplex development. Subdivision of a duplex into two separate lots (strata or Torrens title) requires separate approval. Seek planning advice for your specific site.
Project Examples
- Side-by-side duplex investment — Western Sydney
- Owner-occupier plus rental — 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.