Flood Risk Precinct (NSW)

A Flood Risk Precinct (FRP) is the NSW planning classification system that ranks flood-affected land into Low, Medium, or High Risk precincts based on the depth, velocity, and difficulty of evacuation at the design flood event. The precinct controls what development is permissible, what floor-level and flood-resilience standards apply, and whether the streamlined CDC pathway is available. The system is set out in the NSW Flood Risk Management Manual 2023 and codified through council DCPs across most NSW LGAs (verified 2026-05-16).

The three precincts:

Precinct	Definition	Typical control
Low Risk Precinct	Between the Flood Planning Area (1% AEP + freeboard) and the Probable Maximum Flood (PMF)	Standard residential generally OK; CDC may be available; FPL applies for habitable floors
Medium Risk Precinct	Within the FPA but outside the floodway, where hazards (depth, velocity, evacuation) are moderate	DA required; flood-compatible materials below FPL; evacuation considered
High Risk Precinct	Within the FPA with high velocity x depth hazard, or where evacuation is difficult or impossible	DA strongly restricted; major new residential often prohibited; existing dwellings may be permitted modifications only

Boundaries that define the precincts:

• PMF (Probable Maximum Flood): the theoretical worst-case flood event. Anything above PMF is not classified flood-affected.
• FPA (Flood Planning Area): the area covered by the 1% AEP design flood, plus the freeboard.
• Floodway: the active conveyance zone within the FPA (high velocity, high hazard, see floodway).
• High-hazard FPA: areas within the FPA where the velocity x depth product exceeds the safe-for-vehicles or safe-for-pedestrians threshold.

Worked example (NSW):

Site condition	Precinct	What this means
Ground level above the PMF	Not classified	No flood controls
Ground level between PMF and FPA	Low Risk	CDC may be available; FPL applies
Ground level within FPA, low velocity, easy evacuation	Medium Risk	DA, FPL, some flood-resilience
Ground level within FPA, high velocity, or no safe evacuation route	High Risk	DA strongly restricted, often refused
Ground level within the floodway	Floodway	Development generally prohibited

Why the precinct matters for a builder:

• CDC eligibility: high-risk precincts and floodway are excluded from CDC under SEPP (Exempt and Complying Development Codes) 2008 Schedule 2/4. Builders relying on a CDC will be redirected to DA.
• Insurance and financing: high-risk classification can drive up home-owner flood insurance premiums significantly. Lenders may apply LVR caps.
• Resale value: precinct classification appears on the section 10.7 certificate at every future sale.
• Materials and detailing: medium and high-risk precincts trigger flood-compatible materials below FPL (silicone-resistant wall linings, gravity-drained subfloor cavities, accessible electrical above FPL, etc.).

How to find the precinct for a site:

1. Section 10.7 Certificate (NSW): question 7 names the precinct for the property.
2. Council DCP: maps the precinct boundaries; download from council planning portal.
3. Flood study: technical hydraulic model underlying the precincts.
4. NSW Spatial Services flood viewer: state-level flood mapping (lower resolution than council DCPs but useful as overview).

Distinguishing from other state systems:

State	Equivalent system
NSW	Flood Risk Precinct (this), Low/Medium/High
VIC	Flood Overlay (LSIO, FO, SBO) under planning scheme
QLD	Flood hazard area mapping per LGA (varies)
WA, SA, TAS, NT, ACT	Council-specific mapping

Also known as: FRP; Flood Risk Precinct classification; precinct map; flood precinct.

Category: Site & ground.

Related

• Floodway
• Freeboard
• Flood study

See also

• Flood-prone area

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Last updated: 2026-05-16. Verified: 2026-05-16. Quarterly review for currency.