Flood Risk in Hawkesbury, NSW
Check whether a Hawkesbury property address falls within a flood planning area. Hawkesbury has ARI-quantified flood data from the Hawkesbury-Nepean River Flood Study 2024 — 12 scenarios mapped (1-in-2yr, 1-in-5yr, 1-in-10yr, 1-in-20yr, 1-in-50yr, 1-in-100yr, 1-in-200yr, 1-in-500yr, 1-in-1000yr, 1-in-2000yr, 1-in-5000yr, PMF). Flood status directly affects granny flat eligibility and nearby development activity in Hawkesbury.
Flood data
12 AEP scenarios
Flood features
1,256
Heritage items
604
Flood planning in Hawkesbury — common questions
What flood data exists for Hawkesbury?
The 2024 Hawkesbury-Nepean River Flood Study provides ARI-quantified data including 1-in-100-year through PMF scenarios. This is the most recent flood study for the Hawkesbury-Nepean catchment, published following the 2022 flood events.
How bad were the 2022 Hawkesbury floods?
The March 2022 flood event on the Hawkesbury-Nepean reached levels not seen since 1961 in some areas. The event triggered the 2024 flood study update. Properties in affected areas should check their statutory flood overlay classification, as some may have been reclassified following the study.
Can I build a granny flat on a flood-affected lot in Hawkesbury?
Under SEPP Housing 2021, properties on flood control lots are ineligible for complying development (CDC) for secondary dwellings. A DA with a flood risk management report is required. The Hawkesbury-Nepean catchment has significant flood-mapped areas — use the checker above to see your address's flood status.
Does flood status affect property values in Hawkesbury?
Flood zone classification is a material fact in NSW property transactions and must be disclosed in a Section 10.7 certificate. Properties in high flood risk zones typically face lower market values, higher insurance premiums, and potential restrictions on future development.
Need the full planning picture?
Flood is one layer. A full report covers heritage, CDC eligibility, DCP setbacks, and nearby DA activity.
See all property checks →Also check: granny flat eligibility in Hawkesbury
Also check nearby councils
Flood data for Hawkesbury sourced from the Hawkesbury-Nepean River Flood Study 2024 and NSW Planning Portal EPI statutory overlay. ARI scenarios: 1-in-2yr, 1-in-5yr, 1-in-10yr, 1-in-20yr, 1-in-50yr, 1-in-100yr, 1-in-200yr, 1-in-500yr, 1-in-1000yr, 1-in-2000yr, 1-in-5000yr, PMF. Not a Section 10.7 flood certificate. Not legal advice. Confirm with Hawkesbury Council or a licensed flood consultant before making property or development decisions.