Dual occupancy generally provides two dwellings on one site, attached or detached. Multi-unit development is a broader term that can include townhouses, triplexes or apartments. Whether dwellings remain on one title or are subdivided depends on the planning and property requirements.

There is no single lot size that guarantees suitability. Site shape, planning controls, setbacks, site coverage, access and parking, privacy, overshadowing, open space, drainage and services can all affect what may be possible. A site-specific review is a useful first step.

Consider natural light, privacy, storage, parking and usable private outdoor space, alongside the people each home is intended to suit. These choices shape the layout and should be tested with the project’s design team.

Model the full project costs—including design, consultants, approvals, site works, services, construction, finance and holding costs—against conservative rent or resale assumptions. Outcomes vary by site and market; seek independent finance and tax advice.

A common sequence is site assessment, early council or planning advice, concept design, financial modelling and a planning application. Documentation, engineering, approvals and construction requirements vary by property, so confirm the pathway with the appointed consultants and council.