There are three answers to "is this property in a flood area", not two.
The land can be inside a mapped flood area. It can be outside one. Or no authority has mapped flooding for that land at all, in which case there is nothing to be inside or outside of.
The third answer is the one most tools do not print. Asked about an address in a council with no flood mapping, they return no result, and a page showing no hazards reads as a page showing safety. It is not. It is a page showing that nobody has looked.
Flood planning maps exist for 10 of New South Wales' 128 councils. Across most of the state, a flood search has nothing to search. That is a fact about the register, not about the land.
The same holds elsewhere and for other hazards. Aircraft noise contours exist for the airports whose councils have mapped them. Landslide risk is mapped by some councils and not others. An absence in any of them means the mapping does not reach that land.
A mapped hazard area is a control, made by an authority, for a purpose. Bush fire prone land exists because a council made a map and the Rural Fire Service certified it. A flood planning map exists because a council made one and put it in its planning instrument.
Where a council has published no such map, there is nothing for the land to be inside or outside of. That is not the same as saying no control applies — the flood planning clause is compulsory in every New South Wales council's local environmental plan, whether or not that council has drawn a map. The question has not been asked, and only the council can answer it.
Treating an unmapped hazard as a negative finding overstates what the register supports, and it is the most consequential thing a property report can get wrong: a buyer who is told "no flood risk found" and proceeds is worse off than one told "nobody has mapped this, here is who to ask".
Every field in our report is one of three states. The control applies. The control does not apply, and we say which register we read and when it was current. Or no register covers this land, in which case we say that and name who would hold the answer.
The third case is not a gap in the report. It is the section of it we would keep if we could keep only one: what we looked for, what we could not get, who holds it, and what they charge to tell you.
Check an address$9.90 including GST, paid once. Check the address first — the check is free and tells you which registers cover it before you pay anything.
In Australian property data, unmapped describes land for which no responsible authority has published an assessment of a given hazard. It is distinct from land that has been assessed and found to be unaffected.
The distinction is structural. A flood planning area is land below a council's flood planning level, subject to flood-related development controls. The flood planning clause is compulsory in New South Wales local environmental plans, but the mapping is not: where a council has published no flood planning map, no land in that area is shown as inside or outside one. As at September 2026, 10 of New South Wales' 128 local government areas publish one.
Reporting an unmapped hazard as a negative finding overstates what the register supports.
Coverage figure derived from the NSW flood planning layer. © State of New South Wales (Department of Planning, Housing and Infrastructure), CC BY 4.0.
General information about New South Wales registers. Not legal, planning or valuation advice for any particular property.