Small Second Dwellings and Backyard Buildings in Victoria
Updated 5 October 2026
A backyard building can solve very different problems: space for tools, a place to work, or an independent home for family or a tenant. Define the intended use before choosing a product. A shed, studio and small second dwelling do not share one approval pathway.
What is a small second dwelling?
Planning Victoria describes a small second dwelling as a self-contained home of 60 square metres or less on a lot with an existing dwelling, including a kitchen, bathroom and toilet.
It can be occupied or rented by anyone. It cannot be subdivided or sold separately, must not connect to reticulated natural gas, and does not require an additional car space solely because it is a small second dwelling.
Planning and building permits are separate
Many properties can accommodate a small second dwelling without a planning permit, but site-specific controls may change that. A permit is required on lots under 300 square metres in the residential zones identified by Planning Victoria.
A building permit is always required for a small second dwelling. Planning exemption does not remove building, siting, safety or amenity requirements.
Choose the pathway before the building
Dependent person’s units
This is a distinct category: a movable building for a person dependent on someone living in the main dwelling. Transitional provisions can continue until 28 March 2027. Confirm eligibility and timing with council rather than using the term for any granny flat.
Sheds, workshops and studios
Structures used for storage or work follow a different pathway from independent living accommodation. Building-permit exemptions are conditional. Do not rely on the former generic height and setback checklist in this article.
Tell your architect, council and building surveyor about the intended use, including sleeping, cooking, plumbing or independent occupation. A label such as “studio” does not settle whether the use is lawful.
Five checks before committing
Identify the zone, overlays and current planning provisions.
Review the title, easements and any restrictive covenants.
Define the intended use and who will occupy the space.
Confirm the planning pathway with council and building requirements with a registered building surveyor.
Test access, trees, privacy, services, cost and the effect on the existing home before selecting a supplier.
Planning a second dwelling or backyard building?
The Home Masterplan Report can compare site constraints, layout options and early budget before you commit. Book a free 20-minute Clarity Call to discuss the most useful starting point.
