On 1 July 2024 the NSW Government amended the Housing SEPP so that dual occupancies (attached and detached) and semi-detached dwellings became permissible with consent in every R2 Low Density Residential zone across the state, with limited exclusions. Before that date, permissibility depended on each council’s LEP, and several Sydney councils prohibited or restricted dual occupancies in R2. The change did not remove the LEP minimum lot size for dual occupancies, did not make a duplex complying development on its own, and did not stop councils assessing each DA on merit. Two years on, those three points are still where most of the confusion sits.
Key takeaways
- Stage 1 of the Low and Mid-Rise Housing Policy commenced on 1 July 2024 and applies to R2 zones across all of NSW, not only the Sydney region.
- The change deals with permissibility; a DA is still required and is assessed under section 4.15 of the Environmental Planning and Assessment Act 1979.
- Council LEP minimum lot sizes for dual occupancies still apply, except in low and mid-rise housing areas where stage 2 (from 28 February 2025) sets a 450 square metre and 12 metre non-refusal standard.
- Exclusions include heritage items and certain hazard affected land, and the policy does not apply in the Hawkesbury, Blue Mountains, Wollondilly and Bathurst LGAs.
- Because the use is now permitted with consent, the Low Rise Housing Diversity Code CDC pathway has opened on many R2 lots where it was previously unavailable.
What R2 looked like before July 2024
Every Standard Instrument LEP has an R2 Low Density Residential zone, but each council chose its own land use table. In the years before the reform, the position across our service area was patchy:
- Some LEPs permitted both attached and detached dual occupancies in R2 with a minimum lot size, which is how Blacktown, Penrith and Liverpool generally operated.
- Some permitted attached dual occupancies only, so a front and back detached pair was prohibited.
- Some prohibited dual occupancies in R2 altogether or limited them through DCP controls to corner lots.
The same 600 square metre block could support a duplex on one side of an LGA boundary and not the other. That inconsistency was the stated reason for the state wide change.
What the 1 July 2024 amendment did
Stage 1 of the Low and Mid-Rise Housing Policy amended State Environmental Planning Policy (Housing) 2021 to make dual occupancies and semi-detached dwellings permissible with consent on land in the R2 zone across NSW. Where a council LEP prohibited the use, the Housing SEPP now overrides that prohibition. Where the LEP already permitted it, nothing changed for permissibility.
Three things it deliberately did not do. It did not set a statewide minimum lot size or other development standards for dual occupancies at that stage. It did not change the R2 zone objectives or the DCP controls that councils use to assess design. And it did not touch subdivision, so the ability to split the duplex into two Torrens titles stayed with the LEP lot size clause.
What stage 2 added in February 2025
Stage 2 commenced on 28 February 2025 and is limited to low and mid-rise housing areas, being residential land within 800 metres walking distance of nominated town centres and stations in Greater Sydney, the Central Coast, the Lower Hunter and the Illawarra-Shoalhaven. For dual occupancies in those areas it introduced non-discretionary development standards that a council cannot use as a reason for refusal. According to the department’s summary of key provisions they are:
| Standard | Dual occupancy in a low and mid-rise housing area (R1, R2, R3, R4) | Dual occupancy elsewhere in R2 |
|---|---|---|
| Permissibility | Permitted with consent (Housing SEPP) | Permitted with consent (Housing SEPP, stage 1) |
| Minimum lot size | 450 square metres, non-refusal | Council LEP minimum lot size for dual occupancies, if any |
| Minimum lot width | 12 metres, non-refusal | Council DCP control |
| Height | 9.5 metres, non-refusal | Council LEP height of buildings map |
| FSR | 0.65:1, non-refusal | Council LEP FSR map, if any, or DCP controls |
| Parking | 1 space per dwelling, non-refusal | Council DCP rate |
| Torrens subdivision (R1, R2, R3) | 225 square metres and 6 metres width per lot, non-refusal | Council LEP clause 4.1 and any dual occupancy exception |
Where the local control is more generous than the non-refusal standard, the local control applies. Where the local control is stricter, the state standard prevails. Confirm the current figures in the legislation before relying on them.
Exclusions and the councils outside the policy
The policy exclusions remove certain land from the reforms, including heritage items, bushfire prone land in the mapped vegetation categories, flood planning areas in nominated councils, airport noise contours and Transport Oriented Development areas. Four local government areas are excluded in full: Hawkesbury, Blue Mountains, Wollondilly and Bathurst. On excluded land the council’s own LEP decides whether a dual occupancy is permitted, exactly as it did before July 2024. The section 10.7(2) planning certificate flags heritage, bushfire and flood affectation, so read it alongside the exclusions list.
How councils assess a dual occupancy DA now
Permissibility was the barrier the reform removed. What remains is a normal merit assessment, and in our experience across Western Sydney it has become more detailed rather than less. The controls that decide the outcome are:
- Lot size and width. Outside low and mid-rise housing areas the LEP minimum lot size for dual occupancies is the first check. Many Sydney LEPs set it above 450 square metres in R2, and it is a development standard, so a shortfall needs a Clause 4.6 request.
- Streetscape. DCP controls on garage width, front setback, building form and articulation are applied firmly to keep a duplex reading as a house sized building in a low density street.
- Private open space and landscaping. Each dwelling needs its own usable open space with solar access, and the DCP landscaped area minimum still applies.
- Stormwater and trees. Rear dwellings on lots that fall away from the street need drainage designed to AS/NZS 3500.3:2021, and detached pairs in the rear yard often need an arborist report under AS 4970-2009.
- Subdivision. If separate titles are the goal, apply for the dual occupancy and the subdivision together, and be clear whether the LEP or the state standard supports the lot sizes.
On duplex DAs we write the permissibility section of the Statement of Environmental Effects briefly, citing the Housing SEPP provision, and spend the bulk of the document on the DCP assessment because that is where the planner’s attention goes.
The CDC pathway that opened as a side effect
The Low Rise Housing Diversity Code allows a dual occupancy as complying development only where the use is permitted with consent in the zone. Before July 2024 that shut the Code out of R2 land in councils that prohibited the use. The department’s policy FAQ confirms the Code pathway is now available where the Housing SEPP newly permits the use, so on a regular, flat lot above the Code’s minimum size a private certifier can approve the duplex without a council assessment. Our DA or CDC pathway advice tests whether a site fits.
Owners in Quakers Hill, St Clair, Revesby, Minto and Woy Woy ask us the same question: does the rule change mean I can build a duplex. It means you can apply, and a council can no longer say the use is prohibited. Whether the DA is approved depends on the lot size, the design against the DCP, the site’s constraints and the quality of the application.
Frequently asked questions
Are dual occupancies allowed in all R2 zones in NSW?
Yes, since 1 July 2024 dual occupancies and semi-detached dwellings are permissible with consent in R2 zones across NSW under the Housing SEPP, with limited exclusions. Heritage items, certain hazard affected land and the Hawkesbury, Blue Mountains, Wollondilly and Bathurst LGAs are excluded, and a DA is still required.
What is the minimum lot size for a dual occupancy in R2?
Outside low and mid-rise housing areas, the council LEP minimum lot size for dual occupancies applies and varies by council. Within a low and mid-rise housing area near a nominated centre or station, the state non-refusal standard is 450 square metres with a 12 metre lot width.
Can my council still refuse a dual occupancy in R2?
Yes, on merit. The council cannot refuse because the use is prohibited, and in low and mid-rise housing areas it cannot refuse on the non-refusal standards if you comply. It can still refuse for design, amenity, stormwater, tree or streetscape reasons under section 4.15, which is why the DA documentation matters.
URBA prepares pathway advice, Statements of Environmental Effects and Clause 4.6 requests for dual occupancy and duplex projects across Sydney, Western Sydney, the Central Coast and the Hunter, and we have been lodging R2 duplex DAs under the new rules since they commenced. Send us the address and we will provide a fee proposal with a clear view of what your lot supports.