Knights Hill flood map & planning overlays
A planning-constraint profile of Knights Hill
(Kiama, NSW) - 10.44 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
10.44 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Knights Hill'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 Knights Hill
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 26 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.
Knights Hill at a glance
How Knights Hill is zoned
Buying in Knights Hill? 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 10.44 km², Knights Hill is highly constrained by planning overlays. Flood mapping covers the suburb and none of it falls within a mapped flood overlay, and 100% is flagged bushfire-prone. There is 1 heritage-listed site on record, and the dominant land-use zone is Environmental Conservation. The median lot measures about 233,985 m² across 38 parcels.
Who lives in Knights Hill
Census 2021 figures published by the ABS for the Knights Hill 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 1067, and decile 9 within New South Wales. The national average is 1000.
Population trend, 2001 to 2025
Estimated resident population of Robertson - Fitzroy Falls, the wider ABS statistical area containing Knights Hill. There is no annual population series published at suburb level, so this describes the surrounding area rather than Knights Hill itself.
3,277 in 2001 to 3,899 in 2025, up 19%.
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.
Knights Hill 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 Knights Hill 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 Knights Hill lot.
See what's in the $9 report →Knights Hill planning - frequently asked
Is Knights Hill flood-prone?
Flood mapping covers Knights Hill and none of the suburb falls within a mapped flood overlay.
Is Knights Hill bushfire-prone?
Around 100% of Knights Hill is mapped as bushfire-prone, compared with a Kiama average of 80%.
Is Knights Hill under a flight path?
Aircraft were observed over about 34% of Knights Hill in the period sampled, but only above 3,000 ft - the lowest measured was 2,000 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 Knights Hill?
The dominant planning zone in Knights Hill is Environmental Conservation, though the suburb also includes Environmental Management and National Parks and Nature Reserves.
Does Knights Hill have heritage-listed places?
Knights Hill has 1 heritage-listed place on record.
What is the typical lot size in Knights Hill?
Across 38 surveyed parcels in Knights Hill, the median lot size is about 233,985 m². There are also 7 registered easements mapped in the suburb.
Is Knights Hill an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Knights Hill scores 1067 and sits in decile 9 of 10 nationally and decile 9 within New South Wales (decile 1 is the most disadvantaged tenth, decile 10 the least).
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Tongarra Shellharbour |
3.9 km | 0% | 100% |
| Carrington Falls | 4.5 km | 0% | 100% |
| Yellow Rock Ridge Shellharbour |
5.1 km | 0% | 100% |
| Tullimbar Shellharbour |
5.7 km | Not mapped | 82% |
| Budderoo | 6.4 km | 0% | 100% |
| Curramore | 6.7 km | Not mapped | 98% |
| Macquarie Pass Shellharbour |
7.1 km | 0% | 100% |
| Calderwood Shellharbour |
7.2 km | 0% | 87% |
| Jamberoo | 7.4 km | Not mapped | 98% |
| Upper Kangaroo Valley Wingecarribee |
7.6 km | 0% | 100% |