Tumbi Umbi flood map & planning overlays
A planning-constraint profile of Tumbi Umbi
(Central Coast, NSW) - 12.86 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
12.86 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Tumbi Umbi'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 Tumbi Umbi
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
typical observed square 1 a day
Night movements: observed, lowest 9,000 ft - night is sampled as often as day, but night traffic is light, so this is a floor and no rate can be put on it.
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.
Tumbi Umbi at a glance
How Tumbi Umbi is zoned
Buying in Tumbi Umbi? 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 12.86 km², Tumbi Umbi is highly constrained by planning overlays. About 24% of the suburb sits within a mapped flood overlay, and 88% is flagged bushfire-prone. There are 3 heritage-listed sites on record, and the dominant land-use zone is Environmental Living. The median lot measures about 660 m² across 1,800 parcels.
Who lives in Tumbi Umbi
Census 2021 figures published by the ABS for the Tumbi Umbi 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 1007, and decile 6 within New South Wales. The national average is 1000.
Age profile
Share of Tumbi Umbi's 5,369 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Chittaway Bay - Tumbi Umbi, the wider ABS statistical area containing Tumbi Umbi. There is no annual population series published at suburb level, so this describes the surrounding area rather than Tumbi Umbi itself.
15,143 in 2001 to 16,559 in 2025, up 9%.
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.
Tumbi Umbi 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 Tumbi Umbi 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.
Aircraft have been seen below 3,000 ft over about 46% of Tumbi Umbi. 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 Tumbi Umbi lot.
See what's in the $9 report →Tumbi Umbi planning - frequently asked
Is Tumbi Umbi flood-prone?
About 24% of Tumbi Umbi falls within a mapped flood overlay, against the council-wide suburb average of 30%.
Is Tumbi Umbi bushfire-prone?
Around 88% of Tumbi Umbi is mapped as bushfire-prone, compared with a Central Coast average of 69%.
Is Tumbi Umbi under a flight path?
Aircraft were observed below 3,000 ft over about 46% of Tumbi Umbi, and over about 70% at any altitude up to 10,000 ft, in the period sampled (4 Sep 2026 to 26 Sep 2026). The lowest measured aircraft was at 1,000 ft, with an average of 3,500 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 Tumbi Umbi?
The dominant planning zone in Tumbi Umbi is Environmental Living, though the suburb also includes Environmental Management and Environmental Conservation.
Does Tumbi Umbi have heritage-listed places?
Tumbi Umbi has 3 heritage-listed places on record.
What is the typical lot size in Tumbi Umbi?
Across 1,800 surveyed parcels in Tumbi Umbi, the median lot size is about 660 m². There are also 28 registered easements mapped in the suburb.
Does Tumbi Umbi have a train station?
There is no train station inside Tumbi Umbi itself. The suburb is served by 94 bus stops.
What is the population of Tumbi Umbi?
At the 2021 Census Tumbi Umbi had 5,369 usual residents, with a median age of 45 and an average household size of 2.7 people. The wider Chittaway Bay - Tumbi Umbi statistical area, which contains Tumbi Umbi, went from 15,143 people in 2001 to 16,559 in 2025, up 9%.
Is Tumbi Umbi an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Tumbi Umbi scores 1007 and sits in decile 7 of 10 nationally and decile 6 within New South Wales (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Tumbi Umbi?
Median household income in Tumbi Umbi was $1,657 a week at the 2021 Census, against $1,735 for the typical suburb in Central Coast. Median rent was $410 a week and the median mortgage repayment $2,146 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Matcham | 2.9 km | 7% | 91% |
| Glenning Valley | 3.1 km | 22% | 93% |
| Holgate | 3.5 km | 8% | 97% |
| Killarney Vale | 3.8 km | 50% | 20% |
| Lisarow | 3.9 km | 13% | 89% |
| Bateau Bay | 4.1 km | 34% | 53% |
| Berkeley Vale | 4.2 km | 67% | 44% |
| Fountaindale | 4.3 km | 13% | 98% |
| Wamberal | 4.5 km | 31% | 63% |
| Mount Elliot | 4.8 km | <1% | 100% |