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Duplex Designs Sydney

Thinking of building a duplex home? Whether you need extra space for your extended family or you’re considering building capital and rental income, the Sorensen Design & Planning team is here to help.

Established in 2002, Sorensen Design has become one of Sydney's leaders in duplex home designs. We are Class 2 Certified under the NSW Design and Building Practitioner Act from NSW Design and Building Practitioner Act from NSW Government Fair Trading, ensuring our practice is legally able to design Class 2 Buildings & Developments under the new industry reform.

Contact our team for a free consultation and quote! Our designers will listen to your design aspirations and provide solutions to help you reach your goals on time and on budget.

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Home design projects in New South Wales

Your guide to building a duplex in Sydney

A duplex house design ingeniously integrates two dwellings within a single building framework, offering a unique solution for extended family living or as an investment to generate rental income.

These duplex homes are crafted with dual-living home designs, which cater to the needs of families seeking extra living space or desiring independent living arrangements under one roof. The beauty of a duplex design lies in its ability to provide separate living spaces that, while physically connected, often have separate entrances and are sometimes on separate titles, ensuring privacy and autonomy for occupants.

Duplexes are an attractive option for homeowners interested in dual-occupancy home designs. Dual-occupancy homes allow for versatile use of the property, where one unit can be occupied by owner occupiers. At the same time, the other can be rented out, offering a steady source of rental income. This arrangement is particularly appealing for those with a growing family, an extended family who wish to live nearby but independently, or investors looking to maximise the potential of their property.

The dual living aspect of duplex homes extends beyond just financial benefits; it also fosters a close-knit community feel while maintaining personal space. Whether it's a new duplex aiming for modern dual living comforts or a traditional duplex home looking to accommodate a growing family, the duplex design inherently promotes a balanced communal and private living lifestyle.

The benefits of a duplex home design

There are many benefits to choosing a duplex home design in Sydney.

  • You will have two homes for the price of one! This can be a great way to invest in property and make extra money from rent or resale value.
  • You can save time and construction costs as multiple units will be built simultaneously.
  • Duplex designs often allow more space than a traditional single-family home. You can effectively double your living space without increasing your land footprint — this is perfect for growing families who need the extra room or those who love entertaining guests.
  • Duplex designs can add value to your property and make it more appealing to potential buyers. If you're considering selling your home in the future, a well-designed duplex could be just what you need to boost its value.
  • You have more flexibility when it comes to choosing the layout and features of each unit to meet the specific needs of your tenants or family members.
  • Duplexes can be adapted to any block size or shape, offering more room for custom design.

Contact us today if you want to learn more about duplex designs or start the design and planning process. We have over 20 years of experience helping Sydney home owners achieve the duplex dream, and we would love the opportunity to help you, too. Get in touch with us now for a free consultation and quote.

FAQs about our award-winning duplex designs in Sydney

  • What approvals are needed to build a duplex?

    Building a duplex requires obtaining various approvals, including development applications (DA), construction certificates (CC), and complying development certificates (CDC). Our team at Sorensen Design will guide you through the approval process to ensure all regulatory requirements are met.
  • How does Sorensen Design support clients throughout the duplex design process?

    Sorensen Design offers comprehensive support from initial consultation through to project completion. Our services include site assessment, custom design, and regulatory approvals, ensuring a seamless and stress-free building experience. We can also provide recommendations for reliable duplex builders in Sydney.
  • What should I expect during the initial consultation with Sorensen Design?

    During the initial consultation, we will discuss your vision, requirements, and budget for your duplex project. Our team will also provide insights into the design process, timelines, and potential challenges. This meeting is an opportunity to outline your goals and start planning your dream duplex.
  • What factors should I consider when designing a duplex?

    Key considerations for designing a duplex include local zoning regulations, land size and shape, desired layout and amenities, privacy between units, and future resale value. It's essential to work with an experienced design team to ensure all aspects are thoughtfully planned.


We found Sorensen Design when we walked through their award-winning duplex on Sunset Beach, which was for sale at the time. We engaged Adrian and the team to design our duplex on a steep and sloping block. We can’t believe the result! Adrian and his team are truly experts at what they do and a pleasure to work with.

Colin and Barbara Brown

From the inception of a project through to completion, Sorensen provides an incredible service. The entire team is extremely knowledgeable and ultra-professional. Thank you to Adrian, Madison, Scott and Mark for ensuring my projects become a reality.”

Daniel Crowe