Blue Knob zoning & planning overlays
A planning-constraint profile of Blue Knob
(Lismore, NSW) - 19.84 km², mapped from live council and
state overlay data. This suburb is highly constrained on the overlays we could measure - no flood mapping covers this suburb, so this is not a suburb-wide verdict.
Profile updated 26 September 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
19.84 km² - this suburb is highly constrained on the overlays we could measure - no flood mapping covers this suburb, so this is not a suburb-wide verdict.
Elevation hillshade with street names, clipped to Blue Knob's boundary, with the bushfire and environmental overlays drawn on top. Magenta is where aircraft were observed in the sampled period, brightest below 3,000 ft. No flood layer is drawn because we hold no flood mapping for this area.
Nearby suburbs, nearest first
Aircraft noise and flight paths over Blue Knob
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.
Blue Knob at a glance
How Blue Knob is zoned
Buying in Blue Knob? 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 19.84 km², Blue Knob is highly constrained by the planning overlays we hold. We hold no flood mapping covering this suburb, so no flood figure is shown - that is a gap in our data, not an all-clear. Of what is mapped, 72% is flagged bushfire-prone. There are 5 heritage-listed sites on record, and the dominant land-use zone is Primary Production. The median lot measures about 123,142 m² across 84 parcels.
Who lives in Blue Knob
Census 2021 figures published by the ABS for the Blue Knob 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 862, and decile 1 within New South Wales. The national average is 1000.
Age profile
Share of Blue Knob's 210 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Lismore Surrounds, the wider ABS statistical area containing Blue Knob. There is no annual population series published at suburb level, so this describes the surrounding area rather than Blue Knob itself.
14,249 in 2001 to 16,160 in 2025, up 13%.
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.
Blue Knob data sources and coverage
“Not mapped” means we hold no source layer for this suburb - never an all-clear.
| Dataset | Coverage | Publisher |
|---|---|---|
| Flood mapping | Not 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 Blue Knob 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.
The report's Aircraft Overflight page narrows that to the address itself: how many aircraft a day, how low, and at what heights.
Building or pricing a slab? The $119 geotechnical desktop report covers geology, soils, bores and an indicative AS 2870 site class for a Blue Knob lot.
See what's in the $9 report →Blue Knob planning - frequently asked
Is Blue Knob flood-prone?
We don't yet hold flood mapping covering Blue Knob, so this page can't say how much of the suburb is flood-affected - that is a gap in our data, not an indication that the suburb is free of flood risk. Lismore is the authority to check for flood mapping in this area.
Is Blue Knob bushfire-prone?
Around 72% of Blue Knob is mapped as bushfire-prone, compared with a Lismore average of 33%.
Is Blue Knob under a flight path?
Aircraft were observed over about 27% of Blue Knob in the period sampled, but only above 3,000 ft - the lowest measured was 4,000 ft. 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 Blue Knob?
The dominant planning zone in Blue Knob is Primary Production, though the suburb also includes Natural Waterways and Environmental Conservation.
Does Blue Knob have heritage-listed places?
Blue Knob has 5 heritage-listed places on record.
What is the typical lot size in Blue Knob?
Across 84 surveyed parcels in Blue Knob, the median lot size is about 123,142 m².
Does Blue Knob have a train station?
There is no train station inside Blue Knob itself. The suburb is served by 3 bus stops.
What is the population of Blue Knob?
At the 2021 Census Blue Knob had 210 usual residents, with a median age of 58 and an average household size of 1.9 people. The wider Lismore Surrounds statistical area, which contains Blue Knob, went from 14,249 people in 2001 to 16,160 in 2025, up 13%.
Is Blue Knob an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Blue Knob scores 862 and sits in decile 1 of 10 nationally and decile 1 within New South Wales (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Blue Knob?
Median household income in Blue Knob was $739 a week at the 2021 Census, against $1,458 for the typical suburb in Lismore. Median rent was $250 a week and the median mortgage repayment $1,300 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Lillian Rock Kyogle |
4.2 km | Not mapped | 100% |
| Stony Chute | 4.9 km | Not mapped | 44% |
| Mount Burrell Tweed |
5.5 km | 4% | 100% |
| Nimbin | 5.6 km | Not mapped | 59% |
| Wadeville Kyogle |
6.0 km | Not mapped | 100% |
| Kunghur Creek Tweed |
6.7 km | 2% | 100% |
| Barkers Vale Kyogle |
7.8 km | Not mapped | 100% |
| Mountain Top | 7.8 km | Not mapped | 72% |
| Midginbil Tweed |
8.6 km | 3% | 100% |
| Upper Horseshoe Creek Kyogle |
9.6 km | Not mapped | 100% |