Thinking about a second dwelling in Victoria?

Here’s what’s changed – and what to do next

Whether you’re thinking about a granny flat for ageing parents, a backyard studio for a grown child, a rental to help with the mortgage, or simply a smarter use of your block – Victoria has quietly become one of the easier places in Australia to build a second dwelling.

Under a major planning reform – Amendment VC253 – the Victorian Government overhauled the rules. For most properties, a second dwelling no longer needs a planning permit, and the categories of who can live in one have opened up too. If you’ve been sitting on this idea because it all seemed too hard, it’s a genuinely good time to take another look.

Here’s a practical overview of what’s changed and how to work out whether your property qualifies.

What is a ‘Small Second Dwelling’?

In Victoria, a second dwelling – also called a granny flat, secondary dwelling, backyard studio or accessory dwelling unit (ADU) – is now officially known as a Small Second Dwelling (SSD).

To qualify as an SSD, a dwelling must:

•       Be no larger than 60m² in floor area

•       Be self-contained (its own kitchen, bathroom and living space)

•       Sit on the same title as the existing home

•       Not be subdivided off or sold separately

If your project fits within those parameters, you’re working with the streamlined SSD pathway. If it doesn’t – say you want something larger, or you want to subdivide – you’re back in standard planning territory, which is a different conversation.

Do I need a planning permit? In most cases, no.

This is the big shift. For most Victorian properties, a Small Second Dwelling no longer requires a planning permit, provided your lot is larger than 300m² and you meet the standard siting requirements.

That said, a building permit is still always required. And certain overlays – heritage, bushfire, flooding, significant landscape – can change things significantly. So the first real question isn’t “can I build one,” it’s “what does my particular title actually allow.”

Four things to check before you commit to anything

Before you start working with a designer or a builder, there are four things worth knowing about your own property. These save you real money later.

• Your lot size and zoning. Anything under 300m² changes the picture. Most residential zones in Victoria allow an SSD, though some zones (such as Rural Conservation) still require a planning permit.

• Your overlays. Head to Planning Maps Online and look up your address. Heritage, bushfire, flooding and landscape overlays don’t necessarily stop a project, but they do change what’s required.

• Your services. Power, water, sewer or septic, stormwater – all of these need to cope with a second dwelling. On a sewered block this is usually straightforward. On a septic block, it can be the single biggest cost you didn’t see coming.

• Your title. Some titles carry Section 173 agreements or restrictive covenants that limit what can be built, regardless of what the zoning allows.

None of these are deal-breakers on their own. But they’re the four things that turn a straightforward project into a complicated one – and the four things most people only discover after they’ve already paid for a design.

What the process actually looks like

In broad strokes, the journey from idea to moving in looks something like this: work out whether your site qualifies, clarify your goals and budget, engage a designer or builder, lodge your building permit application, build, and occupy. Each of those stages has its own detail, but the shape is reassuringly simple when you know what you’re looking at.

The hard part, honestly, is the thinking you do before you engage anyone. Getting the brief right – what you actually want, what your site actually allows, what your budget actually covers – is where most of the value lives.

Common questions about second dwellings in Victoria

Do I need a planning permit for a second dwelling in Victoria?

In most cases, no – not on a lot larger than 300m² in a standard residential zone. A building permit, however, is always required.

How big can a second dwelling be in Victoria?

Up to 60m² in floor area, and it must be self-contained – its own kitchen, bathroom and living space – on the same title as your existing home.

Can I rent out a second dwelling?

Yes. The rules now allow anyone to live in a Small Second Dwelling, including a tenant – not just a dependent family member, as was once the case.

Can I subdivide or sell it separately?

No. A Small Second Dwelling stays on the same title as the existing home and can’t be subdivided off or sold on its own.

What can complicate a second dwelling project?

Four things, mostly: overlays on your title, septic capacity on an unsewered block, restrictive covenants or Section 173 agreements, and lots under 300m². They’re worth checking before you spend a cent on design.

Prefer a conversation?

Our free 15-minute consultations are exactly that – a conversation, not a sales pitch. Paul has decades of experience navigating Victorian planning and building rules, and he’s happy to point you in the right direction, whatever you end up building. Book your conversation here.