Dual occupancy · City of Canterbury Bankstown
Duplexes in Canterbury-Bankstown
What a house block in City of Canterbury Bankstown's area needs before it can carry two homes: the LEP minimum (500 m²), whether the state 450 m² / 12 m Low and Mid-Rise rule reaches here, and how the two homes can be titled. Read from the LEP text; the address check applies it to your lot.
The minimums under the LEP
Cl 4.1A — in ‘Area 1’ (the former Canterbury side) attached 500 m² / 15 m, detached 700 m² / 20 m, split at 250 / 350 m² per lot; in ‘Area 2’ (the former Bankstown side) 600 m² / 15 m — the Clause Application Map decides which area your lot is in, so treat 500 m² as the floor and 600 m² as the safe figure; each home must front a road.
Low and Mid-Rise
Inside the state Low and Mid-Rise area — within about an 800 m walk of a listed town centre or station — the Housing SEPP overrides the LEP: a dual occupancy on a lot of 450 m² with a 12 m frontage at the building line, FSR 0.65:1, 9.5 m high, in any R2 zone. Block Checker reads the centre layer on the Planning Portal and tells you which side of the line your lot is on. Bushfire-prone, flood-control and heritage land is carved out and the LEP figures come back.
Can I split it into two titles?
Inside the Low and Mid-Rise area (an 800 m walk of the listed centres), the state rule (Housing SEPP s 169) lets a duplex approved on or after 28 February 2025 be split onto two Torrens lots of at least 225 m² each, 6 m wide at the front building line — one home on each, both fronting the street, no battle-axe lots. So the 450 m² / 12 m minimum lot splits side by side into two 225 m² / 6 m lots. It does not cover strata subdivision.
Outside that area, or on bushfire-prone or heritage land, the council decides. Under the LEP: in ‘Area 1’ (the former Canterbury side) attached 500 m² / 15 m, detached 700 m² / 20 m, split at 250 / 350 m² per lot. The address check tells you which applies to your block.
What the blocks here actually measure
We ran 25 real addresses in each of these Canterbury-Bankstown suburbs through the engine. Median lot and frontage, and how many of the blocks we checked could carry two homes today. A spread of the addresses the NSW geocoder returns, not a census of the suburb.
| Suburb | Median lot | Median frontage | Two homes | Granny flat |
|---|---|---|---|---|
| Georges Hall | 558 m² | 17.4 m | 24 of 25 | 24 of 25 |
| Milperra | 565 m² | 21.4 m | 18 of 25 | 20 of 25 |
| Padstow Heights | 559 m² | 15.2 m | 17 of 25 | 24 of 25 |
| Padstow | 616 m² | 15.2 m | 15 of 25 | 22 of 25 |
| Picnic Point | 632 m² | 15.1 m | 15 of 25 | 19 of 25 |
| Mount Lewis | 618 m² | 15.9 m | 14 of 25 | 20 of 25 |
| Revesby | 675 m² | 15.2 m | 13 of 25 | 19 of 25 |
| East Hills | 751 m² | 13.7 m | 11 of 25 | 22 of 25 |
Getting it approved
A DA to City of Canterbury Bankstown is the universal route and the only one on heritage or constrained lots. A CDC from a private certifier under the Low Rise Housing Diversity Code fast-tracks a code-compliant pair (the greater of 400 m² and the council minimum, and 15 m at the building line — 12 m only where the parking comes off a lane or secondary road, no heritage, no bushfire). The Pattern Book pathway uses a pre-approved NSW design on a level lot that meets its tests — subject to survey (slope). Splitting the pair onto two titles is covered above.
What catches owners out here
- Frontage at the building line — the state rule measures width where the homes sit, not at the kerb; a splayed block can lose a metre.
- Just under — 449 m² is not 450 m². The area shown is the deposited-plan area; a registered survey settles it.
- Constraints — bushfire-prone, flood-control and heritage land takes the lot out of the state rules and the fast-track routes and back to the LEP figures and a DA.
- Easements and sewer — not on the public maps; order the section 10.7 certificate and the sewer diagram before you design.
Questions owners ask
What is the minimum lot size for a duplex in Canterbury-Bankstown?
500 m² under the LEP, with a 15 m frontage. Inside the state Low and Mid-Rise area, within about an 800 m walk of a listed centre or station, the test is 450 m² with a 12 m frontage at the building line instead.
Can I build a duplex on a 450 m² block in Canterbury-Bankstown?
Only inside the Low and Mid-Rise area, on R2 land that is not bushfire-prone, flood-controlled or heritage, and only with 12 m of frontage at the building line. Outside that area the council minimum applies.
Can I subdivide a duplex in Canterbury-Bankstown into two titles?
Inside the Low and Mid-Rise area, yes, for a pair approved on or after 28 February 2025: Torrens lots of at least 225 m² each with 6 m of frontage, no battle-axe. Outside it, the LEP and its Lot Size Map decide.
Do I need a DA for a duplex in Canterbury-Bankstown?
A DA to City of Canterbury Bankstown is the universal route. A code-compliant pair on a clear lot can go through a private certifier as a CDC under the Low Rise Housing Diversity Code, and a level lot that meets the tests can use a Pattern Book design, subject to survey.
More: the City of Canterbury Bankstown guide (granny flats, C4, links) · granny flats in Canterbury-Bankstown · duplex rules across NSW · the Low and Mid-Rise policy · the Pattern Book.
Enter the address — lot, frontage, zone, the Low and Mid-Rise line and the LEP minimum, in about ten seconds.