Cogra Bay flood map & planning overlays
A planning-constraint profile of Cogra Bay (Central Coast, NSW) - 0.58 km², mapped from live council and state overlay data. This suburb is highly constrained.
Everything below is suburb-wide. Overlays change block to block - see which ones actually touch your lot. The map is free.
Constraint readout
0.58 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Cogra Bay's boundary, with the flood, bushfire and environmental overlays drawn on top. It shows where constraints fall; the interactive map shows them on your exact address.
Cogra Bay at a glance
How Cogra Bay is zoned
Buying in Cogra Bay? 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 0.58 km², Cogra Bay 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 are 2 heritage-listed sites on record, and the dominant land-use zone is Environmental Conservation. The median lot measures about 1,098 m² across 59 parcels. These figures are suburb-wide - the overlays that actually apply to a given lot can differ block to block, which is what a property-level check tells you.
Who lives in Cogra Bay
Census 2021 figures published by the ABS for the Cogra Bay 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 1023, and decile 7 within New South Wales. The national average is 1000.
Population trend, 2001 to 2025
Estimated resident population of Calga - Kulnura, the wider ABS statistical area containing Cogra Bay. There is no annual population series published at suburb level, so this describes the surrounding area rather than Cogra Bay itself.
4,793 in 2001 to 4,678 in 2025, down 2%.
Source: Australian Bureau of Statistics. Census of Population and Housing 2021 (General Community Profile) and SEIFA 2021, both published at the Suburbs and Localities level; Regional Population (estimated resident population) at Statistical Area Level 2. Used under CC BY 4.0. Census counts of small populations are randomly adjusted by the ABS to protect confidentiality, so figures for small suburbs are indicative.
Cogra Bay data sources and coverage
Every figure below is an aggregate for the suburb boundary. “Not mapped” means LayeredGeo does not hold a source layer covering this suburb; it is never an all-clear for a particular property.
| 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 |
| Demographics | Available | Australian Bureau of Statistics (2021 Census and SEIFA) |
Profile last materially updated 5 August 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 Cogra Bay 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 →Cogra Bay planning - frequently asked
Where can I see a flood map of Cogra Bay?
The schematic on this page is a Cogra Bay flood map: the mapped flood overlays drawn over the suburb's terrain and street grid. Flood lines vary block to block, so for a specific property use the free interactive map - search any Cogra Bay address and it shows the flood, zoning and bushfire mapping on the exact lot boundary.
Is Cogra Bay flood-prone?
Flood mapping covers Cogra Bay and none of the suburb falls within a mapped flood overlay. Flood overlays vary block to block, so whether a particular lot is affected needs a property-level check.
Is Cogra Bay bushfire-prone?
Yes - around 100% of Cogra Bay is mapped as bushfire-prone, compared with a Central Coast average of 69%. A bushfire-prone designation can trigger additional building requirements, so check the specific address.
What is the zoning in Cogra Bay?
The dominant planning zone in Cogra Bay is Environmental Conservation, though the suburb also includes Environmental Management and Infrastructure. Zoning sets what you can build and do on a site, and can differ lot by lot.
Does Cogra Bay have heritage-listed places?
Cogra Bay has 2 heritage-listed places on record. Heritage listing affects what you can alter or demolish, so confirm whether a specific property is listed or near a heritage place.
What is the typical lot size in Cogra Bay?
Across 59 surveyed parcels in Cogra Bay, the median lot size is about 1,098 m².
Is Cogra Bay an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Cogra Bay scores 1023 and sits in decile 8 of 10 nationally and decile 7 within New South Wales - decile 1 being the most disadvantaged tenth of Australian suburbs and decile 10 the least. The national average score is 1000. SEIFA summarises income, education, occupation and housing across the whole suburb, so it describes the area, not any particular household in it.
Do I need a planning report for a Cogra Bay property?
A Cogra Bay planning report pulls every overlay - zoning, flood, bushfire, heritage and environmental - that touches a single lot, on live council and state data. The interactive map preview is free; a full PDF report is $9.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Mooney Mooney | 1.6 km | 0% | 31% |
| Dangar Island Hornsby |
2.0 km | 0% | 56% |
| Wondabyne | 2.3 km | 0% | 90% |
| Little Wobby | 3.2 km | 0% | 52% |
| Cheero Point | 3.7 km | 0% | 94% |
| Milsons Passage Hornsby |
4.7 km | 0% | 44% |
| Patonga | 5.1 km | 0% | 62% |
| Woy Woy | 5.3 km | 0% | 62% |
| Bar Point | 5.8 km | 0% | 74% |
| Mooney Mooney Creek | 6.4 km | 0% | 93% |