Duplex home designs bring two complete homes together on one asset, offering flexibility for living, investing, or planning for the future.

Kooyong

  • 476
4
2.5
2
1
476m2
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Essendon

  • 400
6
4
2
2
400m2
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Ashwood

  • 403
7
2.5
3
3
403m2
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Northcote

  • 452
4
2.5
2
1
452m2
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Riverview

  • 485
4
2.5
2
1
485m2
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Caulfield

  • 405
7
2.5
3
3
405m2
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Yarraville

  • 414
3
2.5
2
1
414m2
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Morningside

  • 505
4
2.5
2
2
505m2
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Brunswick

  • 464
4
2.5
2
1
464m2
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Chadstone

  • 460
4
3.5
2
1
460m2
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Oxley

  • 294
3
2.5
1
1
294m2
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Two complete homes. One block. Built for flexibility now and later.

Duplex home designs offer a powerful way to do more with your land—without asking either home to compromise. Whether you’re planning to live in one and rent the other, build for extended family with clear separation, or create a property that can be sold or leased independently in the future, a duplex gives you options that evolve with your life.

Duplexes are designed as two complete homes, joined by a shared wall. That independence is what makes duplex home designs especially appealing for buyers who want long term flexibility, financial confidence and a clear path to future resale.

Smarter living, tailored to you

 

Proven Building Expertise

With over 40 years of experience and 60,000 homes built around Australia, we know how to make a duplex home that works with your vision.

Confidence Through Regulations

Managing council regulations can be tricky– but you don't have to do it alone. We provide expert support with council and zoning requirements, giving you confidence that your duplex build is compliant.

Quality and Modern Living

Our duplex home designs combine contemporary style, natural light, and privacy, ensuring high quality homes built for everyday comfort.

Take a tour of a G.J. Gardner duplex home

Taking a tour of a display home is an exciting part of the building journey; it's where you can truly imagine design decisions come to life. Breakfast sizzling away in one home, while the other enjoys a Sunday sleep in. One hosting friends in the living room while the other enjoying a quiet moment on the balcony. Visit a G.J. duplex display home today and get inspired.

Interested in duplex living? Contact us to learn more!

FAQs

  • What is a duplex home?

    A duplex is two separate dwellings with separate titles. Both dwellings front the same street and share an adjoining wall. They can exist on one land title (owned and sold together), or separate titles (individually owned and sold). The land that the duplexes are built on can be subdivided. The subdivision laws are the main difference between dual occupancy and a duplex.

  • How big does my land have to be?

    Council requirements for duplex home designs in Australia vary greatly in different areas, so there is no standard block size, shape or plan that will guarantee approval across all locations. It’s also important to remember that each residence in a duplex is a complete, standalone home. Both dwellings need enough space to comfortably accommodate their own kitchens, bedrooms, bathrooms, living areas and front door. That requirement plays a key role in determining whether a block is suitable for a duplex build.

    Talk to your local G.J. Gardner office for area specific recommendations.

  • What are the benefits of building a duplex?

    A duplex allows residents to own a house and block of land (as opposed to an apartment or unit), at a fraction of the price of a usual house and land package. Many people live in one home and rent or sell the other, helping offset build costs without dealing with body corporate fees. Others might use a duplex to keep adult children or elderly relatives close while maintaining privacy and independence.

  • Can duplex home plans be customised?

    Yes. Our modern duplex home designs can be customised to suit your block and how each dwelling will be used. Some homeowners stick to mirrored layouts while others might opt for different floorplans—for example, a larger owner-occupied home paired with a more compact rental. You can vary other aspects such as rooms, storage, and finishes so that each dwelling has its own look and feel.

  • Is a duplex a good investment?

    Absolutely—it’s one of the most cost effective ways to use your block. For example, you can rent one dwelling while living in the other, rent both to separate households or sell dwellings separately.