Bigga flood map & planning overlays
A planning-constraint profile of Bigga
(Upper Lachlan Shire, NSW) - 602.43 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 26 September 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
602.43 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Bigga's boundary, with the flood, bushfire and environmental overlays drawn on top.
Nearby suburbs, nearest first
Aircraft noise and flight paths over Bigga
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 25 Sep 2026
Night movements: not established - night is sampled as often as day, but too few night flights have been seen here to conclude either way.
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.
Bigga at a glance
How Bigga is zoned
Buying in Bigga? 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 602.43 km², Bigga is highly constrained by planning overlays. Flood mapping covers the suburb and none of it falls within a mapped flood overlay, and 98% is flagged bushfire-prone. There are 6 heritage-listed sites on record, and the dominant land-use zone is Rural Landscape. The median lot measures about 163,289 m² across 1,376 parcels.
Who lives in Bigga
Census 2021 figures published by the ABS for the Bigga 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 988, and decile 5 within New South Wales. The national average is 1000.
Age profile
Share of Bigga's 268 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Goulburn Surrounds, the wider ABS statistical area containing Bigga. There is no annual population series published at suburb level, so this describes the surrounding area rather than Bigga itself.
10,839 in 2001 to 14,411 in 2025, up 33%.
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.
Bigga 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 26 September 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 Bigga 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.
Building or pricing a slab? The $119 geotechnical desktop report covers geology, soils, bores and an indicative AS 2870 site class for a Bigga lot.
See what's in the $9 report →Bigga planning - frequently asked
Is Bigga flood-prone?
Flood mapping covers Bigga and none of the suburb falls within a mapped flood overlay.
Is Bigga bushfire-prone?
Around 98% of Bigga is mapped as bushfire-prone, compared with a Upper Lachlan Shire average of 100%.
Is Bigga under a flight path?
No aircraft were observed over Bigga in the period sampled (4 Sep 2026 to 25 Sep 2026). Sampling is intermittent, so that is a floor rather than proof that none fly over. 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 Bigga?
The dominant planning zone in Bigga is Rural Landscape, though the suburb also includes Environmental Conservation and National Parks and Nature Reserves.
Does Bigga have heritage-listed places?
Bigga has 6 heritage-listed places on record.
What is the typical lot size in Bigga?
Across 1,376 surveyed parcels in Bigga, the median lot size is about 163,289 m². There are also 17 registered easements mapped in the suburb.
What is the population of Bigga?
At the 2021 Census Bigga had 268 usual residents, with a median age of 57 and an average household size of 2.0 people. The wider Goulburn Surrounds statistical area, which contains Bigga, went from 10,839 people in 2001 to 14,411 in 2025, up 33%.
Is Bigga an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Bigga scores 988 and sits in decile 6 of 10 nationally and decile 5 within New South Wales (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Bigga?
Median household income in Bigga was $875 a week at the 2021 Census, against $1,607 for the typical suburb in Upper Lachlan Shire. Median rent was $215 a week and the median mortgage repayment $1,192 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Curragh Bathurst Regional |
11.7 km | 0% | 100% |
| Tuena | 17.5 km | 0% | 100% |
| Reids Flat Hilltops |
18.6 km | Not mapped | 32% |
| Copperhannia Bathurst Regional |
20.7 km | 0% | 100% |
| Wyangala Cowra |
20.7 km | Not mapped | 42% |
| Crooked Corner | 21.8 km | Not mapped | 100% |
| Roseberg Cowra |
22.8 km | 0% | 88% |
| Abercrombie River Bathurst Regional |
25.1 km | 0% | 100% |
| Hovells Creek Hilltops |
25.4 km | Not mapped | 6% |
| Taylors Flat Hilltops |
26.8 km | Not mapped | 41% |