Londonderry flood map & planning overlays
A planning-constraint profile of Londonderry
(Penrith, NSW) - 35.44 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 3 October 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
35.44 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Londonderry's boundary, with the flood, bushfire and environmental overlays drawn on top. Magenta is where aircraft were observed in the sampled period, brightest below 3,000 ft.
Nearby suburbs, nearest first
Aircraft noise and flight paths over Londonderry
Two different things, kept apart on purpose. The ANEF contour is the planning instrument - a forecast published per airport that planning schemes use to control noise-sensitive development. Observed overflight is what a sampled aircraft-tracking feed actually recorded over the suburb - where aircraft flew, how low and how often.
Observed overflight - sampled 4 Sep to 2 Oct 2026
typical observed square 1 a day
Night movements: observed, lowest 500 ft - night is sampled as often as day, but night traffic is light, so this is a floor and no rate can be put on it.
Traffic is sampled rather than watched continuously, so every figure is a floor: aircraft not captured between samples are not represented. Rates are per 500 m square - the busiest square in the suburb, not a count of flights over the suburb - and a square is only rated where enough traffic was seen to measure it. Altitudes are above mean sea level. Flight paths change with runway use, weather, season and airspace design. This is a record of observed traffic; it is not a noise contour and not a planning control.
Londonderry at a glance
How Londonderry is zoned
Buying in Londonderry? The zoning, flood and bushfire lines on the section 10.7 certificate attached to the contract are mapped controls - see our s10.7 certificate guide.
Across its 35.44 km², Londonderry is highly constrained by planning overlays. About 15% of the suburb sits within a mapped flood overlay, and 98% is flagged bushfire-prone. There are 4 heritage-listed sites on record, and the dominant land-use zone is Primary Production Small Lots. The median lot measures about 19,599 m² across 1,355 parcels.
Who lives in Londonderry
Census 2021 figures published by the ABS for the Londonderry suburb boundary itself, not a wider region.
Socio-economic standing
ABS SEIFA 2021 ranks every Australian suburb. Decile 1 is the most disadvantaged tenth of the country, decile 10 the least.
Score 976, and decile 4 within New South Wales. The national average is 1000.
Age profile
Share of Londonderry's 4,024 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Yarramundi - Londonderry, the wider ABS statistical area containing Londonderry. There is no annual population series published at suburb level, so this describes the surrounding area rather than Londonderry itself.
5,963 in 2001 to 7,636 in 2025, up 28%.
Source: ABS Census 2021 and SEIFA 2021 (Suburbs and Localities), Regional Population (SA2), CC BY 4.0. Small counts are randomly adjusted by the ABS.
Londonderry data sources and coverage
“Not mapped” means we hold no source layer for this suburb - never an all-clear.
| Dataset | Coverage | Publisher |
|---|---|---|
| Flood mapping | Mapped | NSW Government spatial services, NSW ePlanning and published council flood studies |
| Bushfire-prone mapping | Mapped | NSW Government spatial services, NSW ePlanning and published council flood studies |
| Zoning | Mapped | NSW Government spatial services, NSW ePlanning and published council flood studies |
| Heritage and environment | Mapped where published | NSW Government spatial services, NSW ePlanning and published council flood studies |
| Aircraft noise contours (ANEF) | Not held | NSW Government spatial services, NSW ePlanning and published council flood studies, Defence |
| Observed flight paths | Observed | adsb.lol, under the Open Database License |
| Demographics | Available | Australian Bureau of Statistics (2021 Census and SEIFA) |
Profile last materially updated 3 October 2026. See the methodology and full source list. Source data changes over time and critical decisions should be checked with the responsible authority.
Check a specific Londonderry address
See exactly which overlays touch a single property - the interactive map is free. Need it on paper? A full planning PDF is just $9.
Aircraft have been seen below 3,000 ft over about 71% of Londonderry. The report's Aircraft Overflight page narrows that to the address itself: how many aircraft a day, how low, and at what heights.
Published flood models are held over parts of Londonderry. The free check tells you whether one reaches an address; where it does, a Flood Model Report is +$9 with the planning report.
Building or pricing a slab? The $119 geotechnical desktop report covers geology, soils, bores and an indicative AS 2870 site class for a Londonderry lot.
See what's in the $9 report →Londonderry planning - frequently asked
Is Londonderry flood-prone?
About 15% of Londonderry falls within a mapped flood overlay, against the council-wide suburb average of 12%. Published flood models are held over parts of Londonderry; the free check on the Flood Model Report page says whether one reaches a given address.
Is Londonderry bushfire-prone?
Around 98% of Londonderry is mapped as bushfire-prone, compared with a Penrith average of 42%.
Is Londonderry under a flight path?
Aircraft were observed below 3,000 ft over about 71% of Londonderry, and over about 76% at any altitude up to 10,000 ft, in the period sampled (4 Sep 2026 to 2 Oct 2026). The lowest measured aircraft was at 500 ft, with an average of 2,000 ft. At the busiest point in the suburb about 2 aircraft a day were recorded passing over one 500 m square. Traffic is sampled rather than watched continuously and flight paths change with runway use, weather and season; the ANEF contour is the planning instrument.
What is the zoning in Londonderry?
The dominant planning zone in Londonderry is Primary Production Small Lots, though the suburb also includes Deferred Matter and Environmental Conservation.
Does Londonderry have heritage-listed places?
Londonderry has 4 heritage-listed places on record.
What is the typical lot size in Londonderry?
Across 1,355 surveyed parcels in Londonderry, the median lot size is about 19,599 m².
Does Londonderry have a train station?
There is no train station inside Londonderry itself. The suburb is served by 55 bus stops.
What is the population of Londonderry?
At the 2021 Census Londonderry had 4,024 usual residents, with a median age of 38 and an average household size of 3.3 people. The wider Yarramundi - Londonderry statistical area, which contains Londonderry, went from 5,963 people in 2001 to 7,636 in 2025, up 28%.
Is Londonderry an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Londonderry scores 976 and sits in decile 5 of 10 nationally and decile 4 within New South Wales (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Londonderry?
Median household income in Londonderry was $2,158 a week at the 2021 Census, against $2,067 for the typical suburb in Penrith. Median rent was $460 a week and the median mortgage repayment $2,400 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Berkshire Park | 4.1 km | 7% | 97% |
| Agnes Banks | 4.8 km | 46% | 76% |
| Llandilo | 5.4 km | 14% | 95% |
| Hobartville Hawkesbury |
5.5 km | 10% | 4% |
| Bligh Park Hawkesbury |
5.8 km | 36% | 24% |
| Richmond Hawkesbury |
6.3 km | 56% | 64% |
| Cranebrook | 6.4 km | 3% | 56% |
| South Windsor Hawkesbury |
6.7 km | 80% | 54% |
| Melonba Blacktown |
6.7 km | 70% | 56% |
| Castlereagh | 6.7 km | 46% | 94% |