Kooyong

  • 476
4
2.5
2
1
476m2
View plan

Essendon

  • 400
6
4
2
2
400m2
View plan

Ashwood

  • 403
7
2.5
3
3
403m2
View plan

Northcote

  • 452
4
2.5
2
1
452m2
View plan

Riverview

  • 485
4
2.5
2
1
485m2
View plan

Caulfield

  • 405
7
2.5
3
3
405m2
View plan

Yarraville

  • 414
3
2.5
2
1
414m2
View plan

Morningside

  • 505
4
2.5
2
2
505m2
View plan

Brunswick

  • 464
4
2.5
2
1
464m2
View plan

Chadstone

  • 460
4
3.5
2
1
460m2
View plan

Oxley

  • 294
3
2.5
1
1
294m2
View plan

Duplex home designs in NSW that maximise your block

A duplex opens up more ways to build on the land you own. It might be about keeping family close while maintaining independence, creating an additional income stream, or building with flexibility in mind for the future. Our duplex home designs in NSW are shaped around these real world goals, helping you make the most of a single block without overcomplicating the process.

Each design focuses on balance and usability, with layouts that allow both households to settle in comfortably from day one. Clear separation, intuitive planning, and thoughtful use of space mean daily life can unfold naturally across the site, giving you the benefits of shared land without shared routines.

Built with everyday ease in mind

A good duplex should feel easy to live in once real life settles in. One home winding down for the night while the other has friends over. Dinner bubbling away on one side while the other packs up. Outdoor spaces that give each household room to step outside, unwind, or potter without feeling on display.

Our duplex house plans in NSW are shaped around these everyday moments, with balanced layouts that feel complete once furniture, people and routines move in.

With more than 60,000 homes built across Australia, we bring practical experience to every duplex build, including working through local planning requirements, access and parking considerations, and site constraints.

Build two homes that feel balanced, liveable, and ready for what’s next. Explore our modern duplex house designs in NSW today.

FAQs

  • What is a duplex home?

    A duplex is made up of two separate dwellings joined by a shared wall, with each home functioning as a complete residence. Both homes face the same street and may sit on one title or be subdivided into separate titles, depending on council approvals and planning requirements.

  • What are the benefits of building a duplex?

    A duplex offers a smart mix of affordability, flexibility, and investment potential. Many homeowners choose to live in one home and rent or sell the other, helping offset build costs. Others build both dwellings as an investment, creating two income streams from a single block without body corporate involvement. Duplexes can also open up opportunities to build in areas where a traditional house and land package may be out of reach.

  • Can duplex home designs be customised?

    Absolutely. Our duplex house designs in NSW can be tailored to suit your needs. That might include extending an alfresco area for outdoor entertaining, incorporating a European laundry, or adjusting bathroom finishings. Your New Homes Consultant will guide you through the options to make sure the design works for your goals and your block.

  • Can each side of the duplex be different?

    Yes. While the exterior is designed to feel cohesive, internal layouts and finishes can vary between the two homes. This works well if one home is owner-occupied and the other is intended for family, guests, or rental use.

  • Are these designs suitable for NSW’s climate?

    They sure are. From coastal humidity to cooler inland towns, our design solutions factor in local weather to keep your home comfortable year round. That includes smart design features like orientation, insulation, ventilation and shade.

  • How do I get started?

    Getting started is simple. Contact your local G.J. Gardner Homes team to explore duplex home designs in NSW, talk through planning considerations, and take the next step in your building journey.