SEPP vs LEP hierarchy (NSW planning instruments)
NSW planning instrument hierarchy: SEPPs override LEPs, which override DCPs. EP&A Act s3.28: SEPP prevails on conflict. Why granny flats can land where the LEP says no.
Ask Chalkline about this →The NSW planning instrument hierarchy under the Environmental Planning and Assessment Act 1979 (EP&A Act) is SEPP > LEP > DCP. State Environmental Planning Policies (SEPPs) are state-wide instruments. Local Environmental Plans (LEPs) are council-wide instruments. Development Control Plans (DCPs) are council-wide design and development guidance documents. Where a SEPP and an LEP conflict, EP&A Act Section 3.28 says the SEPP prevails. The implications are real-world: Housing SEPP 2021 lets you build a secondary dwelling (granny flat) on land where the LEP’s land use table doesn’t permit it; the Codes SEPP runs a CDC pathway the LEP doesn’t.
The three layers:
| Instrument | Who issues | Scope | Force of law |
|---|---|---|---|
| SEPP (State Environmental Planning Policy) | NSW Government (Minister for Planning) | NSW-wide, applies to all councils | Statutory; overrides LEP on conflict |
| LEP (Local Environmental Plan) | Council, gazetted by NSW Government | Council area | Statutory; subordinate to SEPP |
| DCP (Development Control Plan) | Council | Council area | Council policy; not a head of power |
The conflict resolution rule:
EP&A Act Section 3.28 states explicitly that where a SEPP and an LEP cover the same matter and conflict, the SEPP prevails. There is no merit-based discretion; the SEPP wins.
This rule is the single most important planning rule for NSW residential builders because it unlocks pathways the LEP would otherwise block.
Real-world examples:
| Build | LEP says | SEPP says | Result |
|---|---|---|---|
| Granny flat (secondary dwelling) in R2 zone | Land use table doesn’t list secondary dwelling as permissible | Housing SEPP 2021 says secondary dwelling permissible with CDC | Permissible via SEPP |
| Single dwelling on R3 zone with marginal CDC compliance | LEP setback requires 6 m | Codes SEPP Housing Code requires 4 m for the Class | CDC available at 4 m setback |
| Childcare centre in R2 zone | LEP doesn’t list as permissible | Childcare SEPP makes it permissible with CDC | CDC available under Childcare SEPP |
| Granny flat in R5 (large lot residential) | LEP doesn’t list secondary dwelling | Housing SEPP applicability varies by zone | Check zone applicability carefully |
Common builder errors:
- Reading the LEP first and assuming the answer. The LEP is necessary but not sufficient; check the SEPPs that apply.
- Town planner doesn’t surface SEPP availability: a thorough planning advice should canvas SEPP options. If your town planner only quotes LEP, ask about Housing SEPP and Codes SEPP explicitly.
- Confusing DCP with statute: a DCP is council guidance. Compliance is required for council assessment but a DCP doesn’t override an LEP or SEPP.
- Out-of-date SEPP version: SEPPs are revised periodically. The 2021 Housing SEPP consolidated several earlier SEPPs; ensure the current version is being applied.
The current major SEPPs for residential builders:
| SEPP | Coverage |
|---|---|
| Codes SEPP 2008 | Exempt and Complying Development Codes (CDC pathway, exempt development) |
| Housing SEPP 2021 | Secondary dwellings, dual occupancies, group homes, build-to-rent, social housing |
| Resilience and Hazards SEPP 2021 | Coastal, flood, bushfire-related controls |
| Industry and Employment SEPP 2021 | Industrial, business, retail |
| Transport and Infrastructure SEPP 2021 | Major projects, infrastructure |
| Biodiversity and Conservation SEPP 2021 | Biodiversity offsets, conservation |
For builders:
- Walk the SEPP layer first for any non-trivial residential build. SEPPs unlock pathways the LEP closes.
- Read Section 3.28 when the LEP says “no” but a SEPP suggests “yes”. The SEPP wins.
- Engage a town planner who knows the SEPP-LEP interplay in your area. Council planners are sometimes conservative about SEPP-overriding interpretations.
- Treat DCP as guidance, not statute. A DCP-noncompliant build can still be approved if the LEP and SEPP allow it.
- Keep a current planning instrument check on every site as part of the lead workflow. This is one Section 10.7 + a quick SEPP scan; cheap insurance.
Also known as: NSW planning instrument hierarchy, SEPP overrides LEP, EP&A planning hierarchy.
Category: Approvals / NSW / planning instruments.
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Last updated: 2026-05-15. Verified: 2026-05-15.