Australia does not have one national map that gives a final property-level flood answer for every address. Use the national catalogue to find the available study and its owner, then move to the responsible state, territory, catchment authority, or local council for current property information. Record the flood source, modelled event, study date, parcel match, and intended decision before interpreting a shaded area.
Geoscience Australia’s Australian Flood Risk Information Portal page says AFRIP is a catalogue and snapshot of contributed flood studies and maps up to 2018, with ownership remaining with the listed commissioning body or author. Queensland’s official flood-mapping guidance directs property-level questions to the relevant local council. Victoria’s Know Your Risk map routes current property information to the listed Catchment Management Authority and separates general mapping from planning and emergency use. All three routes were reviewed August 26, 2026.
Use the national catalogue to identify the study owner
Search AFRIP by address or location and inspect the returned study record rather than stopping at the national map. Note the study title or identifier, commissioning organisation, completion date, covered watercourses, modelled scenarios, and whether the report or map itself is available. A catalogue marker shows that information was recorded for an area; it is not automatically the current council map for one lot.
The focused Australia Flood Risk Portal Guide covers the AFRIP record itself. For a property decision, use that record as a routing clue. Follow the named custodian to its current website, then check whether a later study, amended planning scheme, property report, or flood certificate has replaced or supplemented the catalogued material.
Confirm the government responsible for the address
Prepare the street address, suburb, state or territory, postcode, local government area, and lot-and-plan identifier when available. A postal locality does not always identify the responsible council boundary. Verify the parcel in an official property or planning map before joining it to a flood layer.
Then identify which organisation owns each answer. Depending on location, that may include a local council, state mapping agency, catchment management authority, planning authority, or emergency service. Queensland explicitly points property-level users to local councils. Victoria’s tool identifies the relevant council and Catchment Management Authority after an address search. Other jurisdictions have their own arrangements; do not copy one state’s workflow across Australia.
Read the event and flood source before the colour
Australian flood studies commonly describe events through Annual Exceedance Probability or other scenario labels. Record the exact AEP, depth, velocity, hazard category, climate or freeboard assumption, and flood source stated by the map. Riverine flooding, creek flooding, overland flow, storm tide, and local drainage can appear in separate layers and may not share one boundary.
A 1% AEP event describes an annual probability, not a timetable and not a promise that flooding occurs only once in a century. A planning overlay may include allowances or controls beyond a modelled flood extent. An emergency display may show current or forecast conditions. Keep these roles visible so a reader does not use a planning layer as a live warning or a historical study as a current property certificate.
For a cross-country starting point, Flood Risk Map by Address explains why national and local systems cannot be reduced to one worldwide zone scale.
Ask the local source for property-level evidence
Open the council, catchment authority, or state tool that actually covers the parcel. Search the address and verify the lot shape, road position, and any building footprint. Record the map or report name, adoption or study date, scenario, visible legend, and whether the property is wholly, partly, or not visibly within the mapped extent.
Where available, request the official property report, flood certificate, planning certificate, or written flood-information service intended for the decision. Ask whether the map reflects recent development, changed ground levels, drainage work, or a newer study. A screenshot from a broad viewer may be useful for screening, but it does not replace a document that the local authority specifically provides for property or development use.
Keep these fields together when requesting help:
- street address and lot-and-plan identifier;
- council, state or territory, and catchment authority;
- study title, custodian, completion date, and map version;
- flood source and exact AEP or modelled scenario;
- parcel or building relationship to the mapped extent;
- purpose of the request and the document the receiving party expects.
Keep purchase, planning, insurance, and emergency answers separate
For purchase or lease due diligence, preserve the current local property information and ask about known building-level history through the appropriate process. For development, use the adopted planning scheme, overlay, flood planning level, and council requirements. For insurance, provide the insurer with the exact current report it requests and ask how its risk model uses the property evidence. For an active event, follow the Bureau of Meteorology, state emergency service, and local disaster dashboard rather than a static study map.
One source can inform several conversations without controlling all of them. A council map does not issue an insurance price. An insurer’s classification does not amend a planning overlay. An AFRIP entry does not certify the present condition of a building. State that boundary in the evidence file.
Reconcile study dates and map disagreement
When two official maps differ, compare the custodian, covered flood source, modelled event, study or adoption date, terrain data, parcel geometry, and intended use. A newer map is not automatically the controlling map for every purpose; an adopted planning instrument and a newer technical study may coexist. Ask the authority responsible for the intended decision to explain which product it uses.
If AFRIP lists a study but the linked document is unavailable, record the commissioning body and study details, then contact the custodian. If the local map does not find the address, retry with lot-and-plan data or coordinates. If the parcel crosses a mapped edge, save the full lot and building position instead of reporting one label for the entire property.
Preserve an Australian flood-source register
Create one register with the verified property identity, jurisdiction, study owner, study title and date, flood source, AEP or scenario, local map or report, parcel relationship, planning status, lookup date, and the office responsible for follow-up. Attach the legend and source page to every exported map.
The defensible conclusion is limited to what each named authority displayed or documented for that parcel and scenario on the checked date. It does not prove that flooding will or will not occur, determine planning approval, guarantee insurance terms, or replace emergency instructions. Unresolved ownership, stale study coverage, or conflicting products should remain open until the responsible local authority answers them.