The Northern Beaches is one of the few LGAs in Sydney still governed by four separate Local Environmental Plans. Each one treats dual occupancy differently. Some allow it. Some prohibit it. Some set minimum lot sizes. Others stay silent.
A draft consolidated LEP is working its way through the NSW planning system. If adopted, it will replace all four LEPs with a single set of rules for the entire LGA, and dual occupancy provisions are one of the biggest changes on the table.
This article compares the current dual occupancy rules under each LEP, explains what the draft proposes, identifies who benefits and who loses, and clarifies how the CDC pathway under the Codes SEPP (Low Rise Housing Diversity Code) fits around all of it. If you own a site on the Northern Beaches and want to know where you stand for a dual occupancy or duplex subdivision, this is the breakdown.
The Four Current LEPs and Northern Beaches Dual Occupancy Rules
The Northern Beaches Council was formed in 2016 from three former councils: Manly, Pittwater, and Warringah. Each brought its own LEP, and a fourth plan (the Warringah LEP 2000) still applies to a pocket of deferred lands. The result is four different rule sets sitting side by side within one LGA.
Here is how each LEP treats dual occupancy as of April 2026.
Manly LEP 2013
Dual occupancy (both attached and detached) is permissible in the R2 Low Density Residential and R3 Medium Density Residential zones. There is no dual-occupancy-specific minimum lot size in the LEP. The lot size falls back to the Lot Size Map, which typically ranges from 450 to 600 sqm depending on the locality.
For subdivision of the completed dual occupancy, subdivision falls to the SEPP prescribed minimum of 200 sqm for Torrens title and 180 sqm for Strata.
Pittwater LEP 2014
Dual occupancy (attached and detached) is permissible in R2 and R3. However, cl. 4.1B of the Pittwater LEP sets a specific minimum lot size of 800 sqm for any dual occupancy development.
For subdivision of the completed dual occupancy, subdivision falls to the SEPP prescribed minimum of 200 sqm for Torrens title and 180 sqm for Strata.
Warringah LEP 2011
Dual occupancy is prohibited in R2 under this LEP. It is only permissible in R3 Medium Density Residential zones. There is no dual-occupancy-specific minimum lot size for R3. It would fall back to Code SEPP requirements.
Warringah LEP 2000 (Deferred Lands)
This is a limited, place-based plan that applies to specific deferred lands within the former Warringah area. It uses locality statements rather than standard residential zones, and dual occupancy is generally not permitted in residential localities. Minimum lot sizes are not specified in the same way as the standard instrument LEPs.
For subdivision, the SEPP minimum of 200 sqm per lot applies as the fall-back position.
| LEP | Permissible in R2? | Permissible in R3? | Min. Lot Size for Dual Occ (R2) | Min. Lot Size for Subdivision of Dual Occ |
|---|---|---|---|---|
| Manly LEP 2013 | Yes (attached and detached) | Yes | No LEP-specific minimum. Falls to Lot Size Map (typically 450 to 600 sqm) | SEPP prescribed min. 200 sqm (Torrens) / 180 sqm (Strata) |
| Pittwater LEP 2014 | Yes (attached and detached) | Yes | 800 sqm (cl. 4.1B) | SEPP prescribed min. 200 sqm (Torrens) / 180 sqm (Strata) |
| Warringah LEP 2011 | No (prohibited). Overridden by Housing SEPP from July 2024 (DA only) | Yes (R3 only) | N/A in R2 under LEP. No dual-occ-specific minimum in R3. Falls back to Code SEPP requirements | SEPP prescribed min. 200 sqm (Torrens) / 180 sqm (Strata) |
| Warringah LEP 2000 (Deferred Lands) | Limited. Place-based plan, generally not permitted | N/A (uses locality statements, not standard zones) | Not specified | SEPP prescribed min. 200 sqm (Torrens) / 180 sqm (Strata) |
What Does the Draft Northern Beaches LEP Propose for Dual Occupancy?
The draft Northern Beaches LEP was presented to Council at the Extraordinary Meeting on 17 June 2024. It proposes to consolidate all four LEPs into a single plan for the LGA. The exact clause wording sits in Appendix F (indicative LEP) of the Planning Proposal.
Here is what the draft proposes for dual occupancy.
R2 Low Density Residential
Attached dual occupancy would be permissible LGA-wide, with a minimum lot size of 800 sqm.
Detached dual occupancy would also be permissible, but only on sites with dual street frontage (for example, corner lots or through-site lots).
R3 Medium Density Residential
Dual occupancy would remain permissible. Minimum lot sizes and frontages follow the Lot Size Map and LEP/DCP controls.
Subdivision Under the Draft LEP
Subdivision falls to the SEPP prescribed minimum of 200 sqm for Torrens title and 180 sqm for Strata.
| Zone | Permissible? | Min. Lot Size for Dual Occ | Min. Lot Size for Subdivision of Dual Occ |
|---|---|---|---|
| R2 Low Density Residential | Attached: Yes, LGA-wide. Detached: Yes, but only on dual-street-frontage sites (e.g. corner lots) | 800 sqm | SEPP prescribed min. 200 sqm (Torrens) / 180 sqm (Strata) |
| R3 Medium Density Residential | Yes | Per Lot Size Map | As above |
Who Wins and Who Loses Under the Draft LEP?
Not every property owner benefits equally. The draft LEP creates clear winners and clear losers depending on which former council area your site sits in.
Winners
• Owners of large R2 lots in the former Warringah area. Suburbs like Brookvale, Dee Why, Beacon Hill, Forestville, Frenchs Forest, Allambie, Cromer, Narraweena, and Manly Vale see the biggest uplift. Dual occupancy goes from prohibited under Warringah LEP 2011 to permissible at 800 sqm / 18 m under the draft LEP. This is the single largest change in the LGA.
• Owners of corner lots or dual-frontage lots in R2 LGA-wide. Detached dual occupancy becomes permissible on these sites
Losers
• Owners of smaller R2 lots in the former Manly area (sub-800 sqm). Under Manly LEP 2013, sites ranging from 450-600 sqm are permissible.
• Residents in former Warringah R2 streets relying on the prohibition for amenity protection. Density and dual occupancy activity will increase in those streets once the LEP is adopted.
How Does the CDC Pathway Work for Northern Beaches Dual Occupancy?
This is where it gets commercially important. The LEP controls what is permissible. But the approval pathway you use, whether CDC or DA, determines the speed, cost, and certainty of the project.
The Codes SEPP (Low Rise Housing Diversity Code) and CDC Thresholds
The Codes SEPP (State Environmental Planning Policy (Exempt and Complying Development Codes) 2008) allows dual occupancy to be approved as a complying development certificate (CDC) in R1, R2, R3, and RU5 zones, provided dual occupancy is already permissible under the relevant LEP.
Pathway is faster (20-day determination), does not require council assessment, and can be issued by a registered certifier. For most dual occupancy projects on the Northern Beaches, this is the preferred commercial pathway.
Where the Housing SEPP (LMR) Fits In (DA Only)
The Housing SEPP Low and Mid-Rise reforms (Stage 1, from 1 July 2024) overrode the Warringah LEP 2011 prohibition and made dual occupancy permissible in all R2 zones statewide. However, this permissibility operates through the DA pathway only.
For areas where dual occupancy was not previously permissible under the LEP (such as R2 in the former Warringah area), CDC approval was not available until 1 July 2025. This delay was built into the reforms to give councils time to establish new minimum lot size rules for CDC assessment.
What this means in practice: if your site is in R2 in the former Warringah area, the Housing SEPP gave you DA permissibility from July 2024 and CDC availability from July 2025. But the CDC runs through the Codes SEPP thresholds, not the Housing SEPP numbers.
Why Subdivision Is a Separate Step
Regardless of whether you build via CDC or DA, the subdivision of the completed dual occupancy is a separate step. Torrens title subdivision requires a Subdivision Certificate and must meet the SEPP prescribed minimum of 200 sqm per lot. Strata subdivision has a lower threshold of 180 sqm under the SEPP.
The Codes SEPP controls the building approval, not the resulting lot sizes. That is why many dual occupancy projects on smaller sites choose the strata pathway over Torrens.
Where Is the Draft Northern Beaches LEP Up To?
Making a new LEP is a multi-stage process with sign-offs at each step. Here is where Northern Beaches Council stands as of April 2026.
The Approval Stages in Plain English
1. Background work (2020 to 2023). Council spent roughly four years on environment studies, housing studies, traffic studies, and community engagement under the Planning Our Sustainable Future program. Over 2,300 people gave feedback.
2. Drafting the Planning Proposal (2023 to early 2024). Council wrote the proposal explaining the new rules and their justification.
3. Local Planning Panel review (23 May 2024). An independent panel reviewed the work and endorsed it to proceed.
4. Council vote (17 June 2024). Councillors voted at an Extraordinary Meeting to send the proposal to the NSW Minister for Planning.
5. Gateway Determination (14 October 2025). The State Government gave conditional approval to proceed, subject to Council addressing specific conditions before public exhibition.
6. Public Exhibition (scheduled for 2026). Once the conditions are addressed, the public gets to read the proposal and submit comments. This is the step everyone is waiting for.
7. Final adoption (expected after exhibition). Council reviews the submissions, makes final changes, and the Minister signs the LEP into law.
Where It Sits Today (April 2026)
Post-Gateway, pre-exhibition. Council is revising the Planning Proposal to address the Minister’s conditions from October 2025. Nothing beyond the June 2024 version is publicly available yet. Public exhibition is expected during 2026, with final adoption likely in late 2026 or 2027.
What to Watch
The Minister’s Gateway conditions from October 2025 are not yet public. They may change the 800 sqm or 18 m numbers before exhibition.
The Housing SEPP (LMR) already overrides large parts of the existing LEPs. The draft LEP has to work around the SEPP, not ignore it.
Anything built or subdivided before the new LEP is made still runs under the current four LEPs plus the Housing SEPP and Codes SEPP.
Can You Build a Dual Occupancy CDC in the Former Warringah Area Right Now?
Yes. Since 1 July 2025, CDC approval for dual occupancy is available in R2 zones in the former Warringah area through the Codes SEPP (Low Rise Housing Diversity Code). The Housing SEPP gave DA permissibility from July 2024, and CDC availability followed from July 2025.
The CDC thresholds under the Codes SEPP apply. This is a lower bar than the draft LEP’s proposed 800 sqm / 18 m for DA, which means many sites that would not qualify under the draft LEP can still proceed via CDC right now.
Do You Need 800 sqm for a Northern Beaches Dual Occupancy?
It depends on the pathway and the LEP that applies to your site.
Under the Codes SEPP (CDC pathway), the SEPP requirements are to be met where not specified. This applies LGA-wide where dual occupancy is permissible.
Under the current Pittwater LEP 2014 (DA pathway), you need 800 sqm under cl. 4.1B.
Under the current Manly LEP 2013 (DA pathway), there is no dual-occupancy-specific minimum. The Lot Size Map applies 450-600 sqm
Under the draft Northern Beaches LEP (DA pathway, if adopted), the proposed minimum is 800 sqm for R2 zones.
The 800 sqm figure is not universal. It applies to specific LEPs and the proposed draft, not to the CDC pathway.
Should You Wait for the New LEP or Act Now?
The draft LEP is still in the pre-exhibition stage. It has not been adopted. The Gateway conditions may change the proposed rules before they are exhibited, and public submissions may change them again before adoption.
In the meantime, the current four LEPs remain in force, and the Codes SEPP CDC pathway is available now. If your site meets the CDC thresholds under the current rules, waiting for a draft LEP that may or may not improve your position carries commercial risk for no clear gain.
Projects built and subdivided under the current rules are assessed against the current rules. The new LEP, whenever it arrives, applies only to future applications.
Next Steps
If you are planning a dual occupancy or duplex subdivision on the Northern Beaches and want clear advice on the certification pathway, Southwell Certifiers can help. We have direct experience in the Northern Beaches LGA, we can confirm whether your site qualifies and which pathway gives you the fastest result.
To discuss your project and receive a no-obligation fee proposal, contact us on (02) 8734 5676, email admin@southwellcert.com.au, or request a fee proposal.
