The question most owners ask first is "how big does my block need to be?" The honest answer is that Victoria doesn't set one number. We've built multi-dwelling projects, and the blocks that worked and the blocks that didn't were separated by a handful of rules, not by a single square-metre figure.
The short answer. There is no single statewide minimum land size for putting two dwellings on a block in Victoria. A permit is required in the residential zones, and the block works if two homes can fit within the garden area and site coverage limits, the overlays, any easements or covenants, and the tree rules on your site and your neighbours'. Bigger blocks make that easier. They aren't a guarantee.
1. The zone decides whether a permit is needed, and which rules apply
In the General Residential, Neighbourhood Residential and Residential Growth zones, a planning permit is required to construct or extend two or more dwellings on a lot. Council assesses the application against the Victorian standards, and your zone and any overlay add their own conditions. A knockdown and a single replacement home is a different path. Dual occupancy always means a permit.
2. The Townhouse and Low-Rise Code
Since 31 March 2025, the state's Townhouse and Low-Rise Code has set out deemed-to-comply standards for townhouses and low-rise apartments in residential zones. If a proposal meets every standard, council must treat the relevant design standards as met, and neighbours can't take it to VCAT on those grounds. That's why the standards below matter more than they used to. They are the checklist your block is measured against.
3. Garden area: the rule that most often caps a small block
Garden area is the part of the lot that stays as open ground. Under the Victorian standards it's any area with a minimum dimension of 1 metre that isn't taken up by dwellings, driveways or car parking. Ask how your designer is treating pools, paving, retaining walls and outbuildings, because they can eat into it quickly.
| Lot size | Minimum garden area |
|---|---|
| Under 400 m² (existing lot) | Exempt when you build or extend |
| 400 to 500 m² | 25% of the lot |
| Over 500 to 650 m² | 30% of the lot |
| Over 650 m² | 35% of the lot |
A vacant lot under 400 m² created by subdivision needs 25%. The exemption for existing small lots applies to the lot as it sits today.
4. Site coverage: the other cap
Site coverage limits how much of the lot the buildings can cover. The percentage depends on the zone. As a worked example, a 600 m² lot in the General Residential Zone, with a 65 per cent cap, allows about 390 m² of buildings, and its 30 per cent garden-area requirement means at least 180 m² of open ground. Two homes, two garages, two driveways and a shared crossover all have to fit inside that. This is why a block that looks generous on paper can run out of room.
5. Overlays, easements and covenants
These are the quiet block-killers. A sewer or drainage easement can take a strip of the block out of play. A restrictive covenant on the title can prohibit more than one dwelling outright. Heritage, vegetation and design and development overlays each add permit triggers or conditions. Check the title and the planning certificate before you spend on design.
6. Trees
Under Clause 52.37, a canopy tree on your site, or one close to the boundary, can restrict where a second dwelling goes, and removing it can need a permit and replacement planting. Trees on the neighbour's side matter too, because their root zones reach into your block. Our guide to tree protection zones, canopy trees and overlays walks through how that works.
7. Subdividing, or holding the block as one title
Two dwellings on one lot and two dwellings on two separate titles are different projects. Subdividing needs its own permit and certification, and each lot has to satisfy the rules above on its own. Some owners build both homes and hold one title for now, then subdivide later. Others build in stages. We've seen all three, including on our Lorraine development in Langwarrin. Which one suits you depends on your finance, your tax position and what you want to do with the second home, so take that to your accountant and lender as well as your builder.
How to check your own block
Start with the facts, not the square metres. Get your title and plan of subdivision, check the zone and overlays, and measure what the garden-area and coverage numbers leave you. Our free feasibility check runs your address against Victoria's official planning data and returns your zoning, overlays and flags in under a minute. It won't tell you a second dwelling will be approved, but it will tell you what to ask before you pay a designer. If you want to talk it through, book a free chat with us.
Common questions
What is the minimum land size for dual occupancy in Victoria?
There is no single statewide minimum. Whether a block works depends on its zone, the garden area and site coverage limits, overlays, easements, covenants on the title and tree rules. Larger blocks make it easier to meet them, but a smaller block with a good design can work and a large one with a covenant or easement may not.
Do I need a planning permit for dual occupancy in Victoria?
Yes, in the General Residential, Neighbourhood Residential and Residential Growth zones a permit is required to construct or extend two or more dwellings on a lot.
What is garden area, and how much do I need?
Garden area is open ground with a minimum dimension of 1 metre that isn't covered by dwellings, driveways or car parking. The requirement is 25 per cent for lots of 400 to 500 square metres, 30 per cent for lots over 500 and up to 650, and 35 per cent for lots over 650. Existing lots under 400 square metres are exempt when you construct or extend.
Can I knock down my house and build two homes?
Often yes, subject to a planning permit and the rules above. A knockdown for a single replacement home is a simpler path. Two homes means a permit, and a check of the zone, overlays, title and trees before you design.
Do I have to subdivide to build two dwellings?
No. You can build two dwellings on one lot and subdivide later, or not at all. Subdividing needs its own permit and each new lot has to meet the standards on its own.
General guidance current at October 2026, drawn from the Victorian planning scheme and Planning Practice Note 84. Standards, zone schedules and overlays vary by council and by site, and the rules have been changing. This is not legal or planning advice. Check your specific block with council or a town planner before you commit.
