Marchmont flood map & planning overlays
A planning-constraint profile of Marchmont
(Yass Valley, NSW) - 53.27 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 3 October 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
53.27 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Marchmont'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 Marchmont
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 2 Oct 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.
Marchmont at a glance
How Marchmont is zoned
Buying in Marchmont? 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 53.27 km², Marchmont 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 5 heritage-listed sites on record, and the dominant land-use zone is Primary Production. The median lot measures about 79,111 m² across 143 parcels.
Who lives in Marchmont
Census 2021 figures published by the ABS for the Marchmont 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 1098, and decile 10 within New South Wales. The national average is 1000.
Age profile
Share of Marchmont's 285 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Yass Surrounds, the wider ABS statistical area containing Marchmont. There is no annual population series published at suburb level, so this describes the surrounding area rather than Marchmont itself.
8,258 in 2001 to 13,346 in 2025, up 62%.
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.
Marchmont 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 3 October 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 Marchmont 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 2% of Marchmont. 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 Marchmont lot.
See what's in the $9 report →Marchmont planning - frequently asked
Is Marchmont flood-prone?
Flood mapping covers Marchmont and none of the suburb falls within a mapped flood overlay.
Is Marchmont bushfire-prone?
Around 100% of Marchmont is mapped as bushfire-prone, compared with a Yass Valley average of 99%.
Is Marchmont under a flight path?
Aircraft were observed below 3,000 ft over about 2% of Marchmont, and over about 55% at any altitude up to 10,000 ft, in the period sampled (4 Sep 2026 to 2 Oct 2026). The lowest measured aircraft was at 2,500 ft, with an average of 5,000 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 Marchmont?
The dominant planning zone in Marchmont is Primary Production, though the suburb also includes Large Lot Residential and Environmental Living.
Does Marchmont have heritage-listed places?
Marchmont has 5 heritage-listed places on record.
What is the typical lot size in Marchmont?
Across 143 surveyed parcels in Marchmont, the median lot size is about 79,111 m². There are also 13 registered easements mapped in the suburb.
Does Marchmont have a train station?
There is no train station inside Marchmont itself. The suburb is served by 4 bus stops.
What is the population of Marchmont?
At the 2021 Census Marchmont had 285 usual residents, with a median age of 42 and an average household size of 3.2 people. The wider Yass Surrounds statistical area, which contains Marchmont, went from 8,258 people in 2001 to 13,346 in 2025, up 62%.
Is Marchmont an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Marchmont scores 1098 and sits in decile 10 of 10 nationally and decile 10 within New South Wales (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Marchmont?
Median household income in Marchmont was $3,187 a week at the 2021 Census, against $2,625 for the typical suburb in Yass Valley. Median rent was $340 a week and the median mortgage repayment $2,644 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Yass | 8.8 km | 0% | 94% |
| Manton | 9.4 km | 0% | 100% |
| Boambolo | 10.1 km | 0% | 99% |
| Good Hope | 10.9 km | 0% | 93% |
| Murrumbateman | 11.9 km | 0% | 99% |
| Bango | 15.8 km | 0% | 100% |
| Yass River | 16.7 km | 0% | 100% |
| Jeir | 17.3 km | 0% | 100% |
| Jerrawa Upper Lachlan Shire |
17.8 km | 0% | 100% |
| Cavan | 18.1 km | 0% | 97% |