Dual occupancy rules in Casey
City of Casey assesses these under the Victoria rules below. Heritage, flood or bushfire mapping on your own lot can change what you need to apply for.
Allowed in residential zones with a planning permit, subject to garden area and ResCode
Usually yes, with a planning permit. Victoria sets no statewide minimum lot size for a second dwelling, but the mandatory minimum garden area and the Townhouse and Low-Rise Code standards mean most successful dual occupancies sit on lots of roughly 500 m² or more.
Key rules at a glance
| Minimum lot size | No statewide minimum. Practically around 500-600 m² to fit two dwellings and still meet garden area (indicative - driven by garden area, setbacks and open space rather than a mapped number). |
| Minimum garden area | Applies in the General Residential and Neighbourhood Residential zones only: 25 percent for lots of 400-500 m², 30 percent above 500 and up to 650 m², 35 percent above 650 m². Lots under 400 m² are exempt, and there is no garden area requirement in the Residential Growth, Mixed Use, Township or Housing Choice and Transport zones. |
| Assessment code | Clause 55, now the Townhouse and Low-Rise Code, which introduced deemed-to-comply standards on 31 March 2025 under Amendment VC267. |
| Approval pathway | Planning permit required, except for a small second dwelling of 80 m² or less on a lot of 300 m² or more. VicSmart 10 business day pathway if all deemed-to-comply standards are met, otherwise a standard advertised application. |
| Maximum height | Mandatory 11 m and 3 storeys in the General Residential Zone; 9 m and 2 storeys in the Neighbourhood Residential Zone (indicative - zone schedules vary). |
| Can it be subdivided or strata titled? | Yes, through a separate two-lot subdivision permit. Since 16 October 2025 an eligible two-lot subdivision can also use the 10 business day VicSmart pathway. A public open space contribution is normally payable. |
| Typical timeframe | 10 business days under VicSmart; commonly 4-8 months for a standard advertised application. |
| Zones permitted | Dwelling is a Section 1 use in the General Residential (GRZ), Neighbourhood Residential (NRZ), Residential Growth (RGZ), Mixed Use (MUZ), Township (TZ) and Housing Choice and Transport (HCTZ) zones, including their schedules. Clause 32.08-7 then requires a planning permit to construct two or more dwellings on a lot, or a further dwelling where one already exists. In the Low Density Residential, Rural Living, Farming and Rural Activity zones a second dwelling is a Section 2 use with its own servicing tests. |
Heritage, flood, bushfire and environmental controls on your specific lot can remove the fast-track and require a full application, even when the general rules say you're fine.
How often this applies in Casey
These are the overlays that can remove the fast-track, measured across every parcel in Casey from the same data behind our zoning map. They describe the council, not your block, and they are counted separately — one parcel can carry more than one, so they cannot be added together.
| Overlay | Share of parcels | What that means here |
|---|---|---|
| Heritage | 0.44% | 719 parcels flagged. The rest are mapped and sit outside it. |
| Flood | 9.22% | 15,020 parcels flagged. The rest are mapped and sit outside it. |
| Bushfire | 2.09% | 3,412 parcels flagged. The rest are mapped and sit outside it. |
The most common zone in Casey is GENERAL RESIDENTIAL ZONE - SCHEDULE 1, covering 51.8% of its 162,974 parcels. What you can build is decided by your own lot's zone, not the council's most common one.
Measured from our mapped parcel data, snapshot taken 2026-11-08. Overlays are checked live for a specific address on the address tool.
Dual occupancys in Casey
City of Casey is the authority for Casey in South-East Melbourne. The statewide Victoria rules above set the baseline; the council can apply extra local controls, and heritage, flood or bushfire overlays on your lot can change what's allowed.
Visit City of Casey ↗ Full Victoria rules →
See the Casey zoning map →, showing every parcel in Casey by zone, lot size and mapped constraints.
Frequently asked questions
Do I need council approval for a dual occupancy in Casey?
Usually yes. In Victoria, a dual occupancy generally needs an application, and City of Casey is the authority that assesses it. See the full state rules for the pathway and what's required.
Which council approves a dual occupancy in Casey?
City of Casey is the consent authority for Casey (South-East Melbourne). You can review local planning controls on the council website and lodge through your state planning portal.
What is the minimum land size for a dual occupancy in Victoria?
There is no statewide minimum. What binds is the garden area requirement - 25 to 35 percent on lots of 400 m² or more in the General Residential and Neighbourhood Residential zones - plus setbacks, private open space and car parking under the Townhouse and Low-Rise Code. In practice most dual occupancies are built on lots of about 500 m² and up, although well-designed schemes do succeed on smaller lots in the General Residential and Residential Growth zones.
Sources
- Townhouse and Low-Rise Code - Planning Victoria ↗
- Simplifying subdivisions (Amendment VC288) - Victorian Government ↗
- VicSmart permits - Planning Victoria ↗
- Victoria Planning Provisions clause 32.08 General Residential Zone ↗
Related building rules
General guidance only. Not professional planning advice. Local requirements in Casey can differ from the statewide summary and change over time; always confirm with City of Casey before starting work. Last reviewed: July 2026.
Talk to a town planner in Casey
This page covers the general rules. A qualified town planner can tell you what applies to your block, including the zone, overlays and approval path, before you spend money on drawings.
- Qualified, practising town planners
- Advice specific to your property
- Free, with no obligation