Mount Sylvia flood map & planning overlays
Mount Sylvia: 6 heritage places, 19 ha lots, and 71.8% bushfire-mapped.
Things you won't regret: spending $9 to know the lot before you commit.
Free map preview, then PDF reports from $9 - about the price of an iced latte on a public holiday.
A planning-constraint profile of Mount Sylvia
(Lockyer Valley Regional, QLD) - 41.1 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 7 November 2026.
Constraint readout
41.1 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Mount Sylvia'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 Mount Sylvia
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
typical observed square 1 a day
Night movements: not established - night is sampled as often as day, but too few night flights have been seen here to conclude either way.
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.
Mount Sylvia at a glance
Schools in and near Mount Sylvia
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: 15.39 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 Mount Sylvia address in? Check an address with our free school zone checker.
How Mount Sylvia is zoned
Selling in Mount Sylvia? 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 41.1 km², Mount Sylvia is highly constrained by planning overlays. About 12% of the suburb sits within a mapped flood overlay, and 72% is flagged bushfire-prone. There are 6 heritage-listed sites on record, and the dominant land-use zone is Rural. The median lot measures about 191,456 m² across 127 parcels.
Who lives in Mount Sylvia
Census 2021 figures published by the ABS for the Mount Sylvia 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 1018, and decile 8 within Queensland. The national average is 1000.
Age profile
Share of Mount Sylvia's 70 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Lockyer Valley - West, the wider ABS statistical area containing Mount Sylvia. There is no annual population series published at suburb level, so this describes the surrounding area rather than Mount Sylvia 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.
Mount Sylvia 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 Mount Sylvia 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 16% of Mount Sylvia. 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 Mount Sylvia. 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 Mount Sylvia lot.
Mount Sylvia planning - frequently asked
Is Mount Sylvia flood-prone?
About 12% of Mount Sylvia falls within a mapped flood overlay, against the council-wide suburb average of 29%. Published flood models are held over parts of Mount Sylvia; the free check on the Flood Model Report page says whether one reaches a given address.
Is Mount Sylvia bushfire-prone?
Around 72% of Mount Sylvia is mapped as bushfire-prone, compared with a Lockyer Valley Regional average of 61%.
Is Mount Sylvia under a flight path?
Aircraft were observed below 3,000 ft over about 16% of Mount Sylvia, and over about 89% 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 1,500 ft, with an average of 4,000 ft. At the busiest point in the suburb about 1 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 Mount Sylvia?
The dominant planning zone in Mount Sylvia is Rural, though the suburb also includes Limited Development and Community Facilities.
Does Mount Sylvia have heritage-listed places?
Mount Sylvia has 6 heritage-listed places on record.
What is the typical lot size in Mount Sylvia?
Across 127 surveyed parcels in Mount Sylvia, the median lot size is about 191,456 m². There are also 9 registered easements mapped in the suburb.
What is the population of Mount Sylvia?
At the 2021 Census Mount Sylvia had 70 usual residents, with a median age of 45 and an average household size of 2.4 people. The wider Lockyer Valley - West statistical area, which contains Mount Sylvia, went from 8,973 people in 2001 to 13,029 in 2025, up 45%.
Is Mount Sylvia an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Mount Sylvia scores 1018 and sits in decile 7 of 10 nationally and decile 8 within Queensland (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Mount Sylvia?
Median household income in Mount Sylvia was $939 a week at the 2021 Census, against $1,521 for the typical suburb in Lockyer Valley Regional. Median rent was $250 a week and the median mortgage repayment $650 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Woodbine | 4.3 km | 31% | 60% |
| Caffey | 4.7 km | 22% | 58% |
| Mount Whitestone | 5.3 km | 11% | 69% |
| West Haldon | 6.0 km | 2% | 83% |
| Ingoldsby | 7.7 km | Not mapped | 72% |
| Lefthand Branch | 7.9 km | Not mapped | 91% |
| Junction View | 8.1 km | 15% | 80% |
| Rockside | 8.5 km | Not mapped | 68% |
| Fordsdale | 9.0 km | 5% | 94% |
| Upper Tenthill | 9.3 km | 29% | 29% |