Dual Occupancy Design & Architecture
Thinking about two homes on one block? A well-designed dual occupancy can unlock the full potential of your land - whether you're building for family, creating an income-producing investment, or looking for a smarter way to downsize without leaving the area you love.
LTAA designs considered, light-filled dual occupancy homes across the Central Coast, Lake Macquarie, Newcastle and Port Stephens, led by registered architect Lauran Trevena. Every design is tailored to your block, your council's rules and the way you want to live.
What is a dual occupancy?
A dual occupancy is two separate dwellings on a single lot of land. They can be attached – sharing a common wall, often called a duplex – or detached, where two independent homes sit on the same block.
It’s different from a secondary dwelling, or granny flat, which is a smaller home that sits secondary to a main residence. With a dual occupancy, both homes are designed as complete, standalone dwellings – and depending on your block and zoning, they may be able to be subdivided and sold or rented separately.
Looking for a granny flat instead? See our Secondary Dwellings .
Can you build a dual occupancy on your block?
Recent changes to NSW planning have made dual occupancies possible in many more locations. Under the state government’s Low and Mid-Rise Housing reforms, dual occupancies are now permitted with council consent in low-density residential (R2) zones across NSW – including throughout the Central Coast, Lake Macquarie and Newcastle.
What you can actually build still depends on your block: its size, shape, zoning and your local council’s controls all play a part, and things like minimum lot sizes and setbacks vary from one area to the next.
The best way to know what’s possible is a feasibility check. We assess your site early – before any detailed design – so you have a clear, honest picture of what your block can support and what approvals will be involved.
What it costs and how it works
A dual occupancy is a significant investment, and the right design makes a real difference to both the outcome and the budget. Costs depend on the size of the homes, the slope and access of your site, the finishes you choose, and your council’s requirements.
We’re upfront about this from the start. After an initial consultation we provide a tailored fee proposal for the design and approval work, and we help you understand likely build costs early – so you can plan with confidence and avoid surprises later on.
Our job is to design two homes that are beautiful, practical and genuinely suited to your block, while keeping a close eye on buildability and value the whole way through.
Our dual occupancy design service
- Two homes that feel private and separate, each with its own sense of arrival and outlook
- Light-filled interiors with a natural connection between indoor and outdoor living
- Energy-efficient, passive-solar design that’s comfortable year-round and cheaper to run
- Street-facing façades designed to suit the character of your neighbourhood
- Layouts that make the most of your land, aspect and views
- Full guidance through council approvals and the DA process
Our process
- Consultation – We get to know you, your goals and your block, and talk through what’s possible.
- Concept Design – We explore options and shape an initial design that responds to your site and brief.
- Design Development – We refine the design, materials and detail until it’s right.
- Documentation & Approvals – We prepare the drawings and documentation and guide your application through council.
- Construction Support – We stay involved through the build to make sure the design is delivered as intended.
Areas we serve
We design dual occupancy homes across the Central Coast, Lake Macquarie, Newcastle, Port Stephens and the Hunter. Based in Swansea, we know the local councils, the landscape and the lifestyle – and we design with all three in mind.
Portfolio
Ready to explore what's possible?
Get in touch for an initial consultation and we’ll help you understand your options for a dual occupancy on your block.
Frequently Asked Questions
What's the difference between a dual occupancy and a duplex?
A duplex is one type of dual occupancy – two attached homes sharing a common wall. “Dual occupancy” is the broader planning term, covering both attached homes (duplexes) and two detached homes on the one lot.
What's the difference between a dual occupancy and a granny flat?
A granny flat (secondary dwelling) is a smaller home that’s secondary to a main house and usually can’t be sold on its own. A dual occupancy is two complete, equal dwellings – and depending on your block, they may be able to be subdivided and sold or rented separately.
What size block do I need in NSW?
It depends on your council and zoning. Minimum lot sizes for dual occupancy vary between local government areas, and recent NSW reforms have changed what’s allowed in many R2 zones. We check your specific block as part of an early feasibility assessment.
Can I sell the two homes separately?
Often, yes. Many dual occupancies can be subdivided so each home has its own title and can be sold or rented individually – but this depends on your block, zoning and council approval. We’ll let you know what’s possible for your site.
How much does a dual occupancy design cost?
It depends on the scale and complexity of the project and your site. We provide a tailored fee proposal after an initial consultation, and help you understand likely build costs early so you can plan your budget with confidence.