Dual occupancy rules in New South Wales (2026)
Usually yes, if the block is big enough. Since 1 July 2024 dual occupancies have been permitted with consent in every R2 low density residential zone across NSW, with four council areas excepted - but the minimum lot size and frontage mapped to your property still decide whether a specific block qualifies.
Permitted in R2 and most residential zones, subject to lot size and frontage
Usually yes, if the block is big enough. Since 1 July 2024 dual occupancies have been permitted with consent in every R2 low density residential zone across NSW, with four council areas excepted - but the minimum lot size and frontage mapped to your property still decide whether a specific block qualifies.
Key rules at a glance
| Minimum lot size | Commonly 450-600 m², and 700-1,000 m² or more in some councils (indicative - mapped per property in the LEP). In mapped low and mid-rise housing areas a non-refusal standard of 450 m² applies. |
| Minimum frontage | 12 m in mapped low and mid-rise housing areas. Under the Low Rise Housing Diversity Code, 15 m at the building line, or 12 m where access is from a lane, parallel road or secondary road. |
| Zones permitted | R1, R2, R3 and R4 where the LEP allows it. Permitted with consent in R2 statewide since 1 July 2024, except in Bathurst Regional, Hawkesbury, Blue Mountains and Wollondilly. |
| Approval pathway | Complying development certificate in about 20 days if the Codes SEPP standards are met, otherwise a development application to council. |
| Height and floor space | 9.5 m maximum height and 0.65:1 floor space ratio as non-refusal standards in mapped low and mid-rise housing areas (indicative - LEP controls apply elsewhere). |
| Can it be subdivided or strata titled? | Often yes. For consents granted on or after 28 February 2025 in R1, R2 and R3, subdivision cannot be refused where each resulting lot is at least 225 m² and 6 m wide with lawful road access and no battle-axe configuration. Otherwise your LEP decides whether Torrens or strata subdivision of a dual occupancy is allowed. |
| Typical timeframe | About 20 days for a complying development certificate; commonly 3-6 months for a development application. |
Conditions & eligibility
- The lot must meet the minimum lot size mapped to it in the LEP, or the applicable non-refusal standard.
- The lot must meet the minimum width or frontage at the building line for the pathway you are using.
- Complying development is not available on heritage items, in heritage conservation areas, or on land in an environmentally sensitive area.
- Flood control lots and bushfire prone land usually force a development application rather than a CDC.
- Bathurst Regional, Hawkesbury, Blue Mountains and Wollondilly sit outside the statewide R2 permissibility change.
- Subdivision into two titles is a separate approval and is never automatic.
Heritage, flood and bushfire 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 approval works in New South Wales
There are two routes. Where your council's local environmental plan (LEP) permits dual occupancy and the design meets the Low Rise Housing Diversity Code in the Codes SEPP, council or a private certifier can issue a complying development certificate (CDC) in about 20 days with no neighbour notification. Otherwise you lodge a development application (DA) with council, which is assessed on merit and usually advertised. Where permissibility comes only from the Housing SEPP rather than your LEP, access to the complying development pathway has been progressively opened up since 2025 - confirm the current position with a certifier before relying on it.
Minimum lot sizes for dual occupancy still vary widely between councils - Hornsby, Ku-ring-gai and several regional LGAs map figures well above the 450 m² non-refusal standard.
Dual occupancy rules by council in New South Wales
Local councils apply the New South Wales framework and can add their own controls. Pick your council:
Frequently asked questions
What size block do I need for a duplex in NSW?
There is no single figure. Most councils map a minimum lot size for dual occupancy between 450 m² and 600 m², and in mapped low and mid-rise housing areas a 450 m² lot at least 12 m wide cannot be refused on lot size grounds. Some councils, including Hornsby and Ku-ring-gai, require 700 m² or more. Check the minimum lot size mapped to your address before you buy or design.
Can I subdivide a duplex in NSW and sell the two halves separately?
Often, but it is a separate approval. For dual occupancy consents granted on or after 28 February 2025 in R1, R2 and R3 zones, subdivision cannot be refused where each new lot is at least 225 m² and 6 m wide with its own lawful road access. Outside that, your LEP decides whether Torrens or strata subdivision of a dual occupancy is permitted at all - some councils allow strata only, some neither.
Do I need a DA for a dual occupancy in NSW?
Not always. If your LEP permits dual occupancy and the proposal meets the Low Rise Housing Diversity Code, a certifier can issue a complying development certificate in about 20 days without notifying neighbours. Heritage, flood or bushfire constraints, or a design that does not meet the code, push you into a full development application with council instead.
Sources
- Low and Mid-Rise Housing Policy - Planning NSW ↗
- Low-Rise Housing Diversity Code - Planning NSW ↗
- State Environmental Planning Policy (Housing) 2021 ↗
Related building rules
This is general guidance, not professional planning advice. Figures are summarised from the sources above and can change — confirm with your council or the NSW Planning Portal before starting work. Last reviewed: July 2026.
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