Duplex & dual occupancy design

Smart dual occupancy design focused on buildability, approvals and long-term value.

Designing a duplex or dual occupancy is about more than simply fitting two dwellings onto a block. The layout, orientation, privacy, parking, approval pathway and construction approach all play a major role in the success of the project.

At Williams Building Design, Sarah works directly with homeowners and developers across Wollongong, the Illawarra and Shoalhaven to create practical dual occupancy designs that balance functionality, liveability and long-term value.

Whether you are planning to live in one dwelling, accommodate extended family or maximise the potential of your site, the early design decisions matter.

A successful duplex needs to work both on paper and in real life.

Williams Building Design can help with:

✓ Side-by-side duplexes
✓ Detached dual occupancies
✓ Dual occupancies for owner occupiers or investment
✓ Sloping or constrained sites
✓ DA and CDC documentation
✓ Floor plans designed for privacy and functionality
✓ Practical, builder-friendly documentation

The goal is to create dual occupancies that feel comfortable to live in, make practical sense to build and suit the long-term goals of the project.

The best dual occupancies do not feel like compromised homes squeezed onto a block.

Careful planning around privacy, natural light, outdoor spaces, parking and internal layout can make a significant difference to both liveability and long-term value.

Sarah works closely with clients to understand how the property will be used and what makes the most practical sense for the site before the design process moves too far.