Dual occupancy rules in Canterbury-Bankstown
Building a dual occupancy in Canterbury-Bankstown? City of Canterbury-Bankstown applies the New South Wales planning framework. Here's what that means locally — plus the overlays worth checking on your specific block.
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. |
| Bush fire prone land | Not a barrier to complying development for a dual occupancy. The Low Rise Housing Diversity Code excludes only multi dwelling housing (terraces) on bush fire prone land, and Codes SEPP cl 1.19A excludes only land assessed as BAL-40 or the Flame Zone. Construction to AS 3959 and the Planning for Bush Fire Protection standards still apply. |
Heritage, flood 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. Bushfire mapped on your lot adds requirements, but does not by itself close the fast-track route.
How often this applies in Canterbury-Bankstown
These are the overlays that can remove the fast-track, measured across every parcel in Canterbury-Bankstown 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 | 2.8% | 2,725 parcels flagged. The rest are mapped and sit outside it. |
| Flood | 0% | 3 parcels flagged. 100% of the council carries no flood mapping at all — unassessed, not cleared. |
| Bushfire | 5.16% | 5,024 parcels flagged. The rest are mapped and sit outside it. |
The most common zone in Canterbury-Bankstown is Low Density Residential, covering 56.0% of its 97,381 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 2026-09-06. Overlays are checked live for a specific address on the address tool.
Dual occupancys in Canterbury-Bankstown
City of Canterbury-Bankstown is the authority for Canterbury-Bankstown in Sydney. The statewide New South Wales 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 Canterbury-Bankstown ↗ Full New South Wales rules →
See the Canterbury-Bankstown zoning map → — every parcel in Canterbury-Bankstown by zone, lot size and mapped constraints.
Frequently asked questions
Do I need council approval for a dual occupancy in Canterbury-Bankstown?
Usually yes. In New South Wales, a dual occupancy generally needs an application, and City of Canterbury-Bankstown 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 Canterbury-Bankstown?
City of Canterbury-Bankstown is the consent authority for Canterbury-Bankstown (Sydney). You can review local planning controls on the council website and lodge through your state planning portal.
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.
Sources
- Low and Mid-Rise Housing Policy - Planning NSW ↗
- Low-Rise Housing Diversity Code - Planning NSW ↗
- State Environmental Planning Policy (Housing) 2021 ↗
- SEPP (Exempt and Complying Development Codes) 2008 - cl 1.19A and Part 3B ↗
Related building rules
General guidance only — not professional planning advice. Local requirements in Canterbury-Bankstown can differ from the statewide summary and change over time; always confirm with City of Canterbury-Bankstown before starting work. Last reviewed: July 2026.
Talk to a town planner in Canterbury-Bankstown
This page covers the general rules. A qualified town planner can tell you what applies to your actual block — the zone, the overlays and the approval path — before you spend money on drawings.
- Qualified, practising town planners
- Advice on your property, not a generic rule
- No cost, no obligation