Helidon flood map & planning overlays

42 heritage-listed places, the most in Lockyer Valley Regional. Helidon keeps its history.

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A planning-constraint profile of Helidon (Lockyer Valley Regional, QLD) - 48.76 km², mapped from live council and state overlay data. This suburb is highly constrained.
Profile updated 7 November 2026.

Planning schematicHelidon

Constraint readout

48.76 km² - this suburb is highly constrained by planning overlays.

Flood overlay 19%

below council avg (29%) · #35 of 71 mapped council suburbs

Modelled flood depth held over parts of Helidon

See the Lockyer Valley flood map by suburb.

Bushfire-prone 82%

1.3× council avg (61%) · #27 of 79 mapped council suburbs

Environmental79%

1.5× council avg (51%) · #23 of 79 in council

Heritage sites 42 Noise corridor 13% Aircraft seen below 3,000 ft 33% Mostly Rural Flood 35th most affected of 71 → Bushfire 27th most affected of 79 →

Elevation hillshade with street names, clipped to Helidon'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 Helidon

The ANEF contour is a published planning forecast and observed overflight is what a sampled tracking feed recorded - neither describes any individual property.

Observed overflight - sampled 4 Sep to 7 Nov 2026

Under observed aircraft

96%

of the suburb, at or below 10,000 ft

Below 3,000 ft

33%

of the suburb's area

Lowest measured

1,000 ft

averaging 4,000 ft

Busiest square

~3 a day

0 a day below 3,000 ft · ±26%
typical observed square 1 a day

Night movements: observed, lowest 3,000 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.

How this is measured

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.

Helidon at a glance

Parcels 652 Median lot 2,025 m² Mapped easements 144 Bus stops 1 Schools in suburb 1

Schools in and near Helidon

Public school-location data shows availability across the suburb; it does not rate schools or assign any individual address to a catchment.

Inside the suburb boundary

1 school providing primary years and 0 providing secondary years. A combined school may be counted in both teaching levels.

Nearest school availability

Primary: inside the suburb

Secondary: 10.92 km from the suburb boundary

Source: Queensland Government school geographic information. Catchment boundaries can divide a suburb and change over time.

Which school zone is a Helidon address in? Check an address with our free school zone checker.

How Helidon is zoned

Rural 55%

Conservation 18%

Special Industry 18%

Rural Residential 2%

Low Density Residential 2%

Low density residential 2%

Selling in Helidon? The lot-level zone is the zoning Part 3 of Queensland's Form 2 seller disclosure statement asks for - see our Form 2 planning data guide.

Across its 48.76 km², Helidon is highly constrained by planning overlays. About 19% of the suburb sits within a mapped flood overlay, and 82% is flagged bushfire-prone. There are 42 heritage-listed sites on record, and the dominant land-use zone is Rural. The median lot measures about 2,025 m² across 652 parcels.

Who lives in Helidon

Census 2021 figures published by the ABS for the Helidon suburb boundary itself, not a wider region.

Population

1,130

usual residents, 2021

Median age

years

Median household income

$1,342

per week, Lockyer Valley Regional suburb typical $1,521

Median rent

$313

per week, Lockyer Valley Regional suburb typical $310

Median mortgage

$1,300

per month

Household size

2.6

people, average

Socio-economic standing

ABS SEIFA 2021 ranks every Australian suburb. Decile 1 is the most disadvantaged tenth of the country, decile 10 the least.

Advantage and disadvantage (IRSAD) Decile 2

most disadvantagedleast disadvantaged

Score 893, and decile 2 within Queensland. The national average is 1000.

Relative disadvantage (IRSD) Decile 2

most disadvantagedleast disadvantaged

Age profile

Share of Helidon's 1,130 residents in each ABS age band.

0-4 7.1%

5-14 14.3%

15-19 5.8%

20-24 5.2%

25-34 13.9%

35-44 9.4%

45-54 12.8%

55-64 13.7%

65-74 10.9%

75-84 5.3%

85+ 1.5%

Population trend, 2001 to 2025

Estimated resident population of Lockyer Valley - West, the wider ABS statistical area containing Helidon. There is no annual population series published at suburb level, so this describes the surrounding area rather than Helidon itself.

8,973 in 2001 to 13,029 in 2025, up 45%.

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.

Helidon 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	the relevant council planning scheme and Queensland Government spatial data
Bushfire-prone mapping	Mapped	the relevant council planning scheme and Queensland Government spatial data
Zoning	Mapped	the relevant council planning scheme and Queensland Government spatial data
Heritage and environment	Mapped where published	the relevant council planning scheme and Queensland Government spatial data
Aircraft noise contours (ANEF)	Not held	the relevant council planning scheme and Queensland Government spatial data, Defence
Observed flight paths	Observed	adsb.lol, under the Open Database License
Demographics	Available	Australian Bureau of Statistics (2021 Census and SEIFA)
School availability	Available	Queensland Government

Profile last materially updated 7 November 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 Helidon 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.

See what's in the $9 report →

Aircraft have been seen below 3,000 ft over about 33% of Helidon. 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 Helidon. 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 the indicative soil reactivity range to expect for a Helidon lot.

Helidon planning - frequently asked

Is Helidon flood-prone?

About 19% of Helidon falls within a mapped flood overlay, against the council-wide suburb average of 29%. Published flood models are held over parts of Helidon; the free check on the Flood Model Report page says whether one reaches a given address.

Is Helidon bushfire-prone?

Around 82% of Helidon is mapped as bushfire-prone, compared with a Lockyer Valley Regional average of 61%.

Is Helidon under a flight path?

Aircraft were observed below 3,000 ft over about 33% of Helidon, and over about 96% at any altitude up to 10,000 ft, in the period sampled (4 Sep 2026 to 7 Nov 2026). The lowest measured aircraft was at 1,000 ft, with an average of 4,000 ft. At the busiest point in the suburb about 3 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 Helidon?

The dominant planning zone in Helidon is Rural, though the suburb also includes Conservation and Special Industry.

Does Helidon have heritage-listed places?

Helidon has 42 heritage-listed places on record.

What is the typical lot size in Helidon?

Across 652 surveyed parcels in Helidon, the median lot size is about 2,025 m². There are also 144 registered easements mapped in the suburb.

Does Helidon have a train station?

There is no train station inside Helidon itself. The suburb is served by 1 bus stop.

What is the population of Helidon?

At the 2021 Census Helidon had 1,130 usual residents, with a median age of 38 and an average household size of 2.6 people. The wider Lockyer Valley - West statistical area, which contains Helidon, went from 8,973 people in 2001 to 13,029 in 2025, up 45%.

Is Helidon an advantaged suburb?

On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Helidon scores 893 and sits in decile 2 of 10 nationally and decile 2 within Queensland (decile 1 is the most disadvantaged tenth, decile 10 the least).

What is the median household income in Helidon?

Median household income in Helidon was $1,342 a week at the 2021 Census, against $1,521 for the typical suburb in Lockyer Valley Regional. Median rent was $313 a week and the median mortgage repayment $1,300 a month.

Compare nearby suburbs

Nearby suburb	Distance	Flood mapped	Bushfire-prone
Helidon Spa	3.3 km	32%	83%
Lockyer	5.9 km	25%	83%
Grantham	5.9 km	26%	71%
Iredale	5.9 km	5%	45%
Postmans Ridge	6.7 km	26%	89%
Upper Lockyer	7.0 km	13%	94%
Carpendale	7.2 km	22%	28%
Derrymore	8.6 km	2%	46%
White Mountain	9.2 km	2%	100%
Seventeen Mile	9.3 km	Not mapped	100%

See all Lockyer Valley Regional suburb profiles →