Duffys Forest

NSW

Duffys Forest is a declining suburb in NSW with 509 residents.

SAL code: 11304
SA2: 122031432
Population: 509
LGA: Northern Beaches

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Duffys Forest suburb boundary

Duffys Forest, NSW had 509 residents at the 2021 Census, with the broader statistical area showing a 6.3% decline over the last five years. The predominant age group is 45-54 years, and the median age sits at 43. Households are most often couples with children, and those with a mortgage repay a median of $6,134 a month. Around 82.2% of homes are owner-occupied, with the largest single tenure being owned outright at 46.7%. Most dwellings are separate houses, making up 100.0% of the suburb's housing stock. The suburb has 1 park or reserve mapped within its boundary. Source: ABS Census 2021 and Estimated Resident Population, with amenity counts from state Open Data and OpenStreetMap.

Population

509

Suburb · Census 2021

5-Year Growth

-6.3%

3yr: -3.6% · 10yr: -4.6%

SA2 · 5yr

Household Income

$4,250/wk

Suburb · Census 2021 median

Median Age

Suburb · Census 2021

Socio-Economic Index

10/10

SA2 · least disadvantaged

Unemployment

3.8%

SA4 · Q4 2025

Hospitals

Not available

No data for this suburb

Childcare services

1 OSHC

Parks & green space

Parks, reserves

Transport stops

GTFS stops

Dwelling approvals

Northern Beaches · Feb 2026

Median Weekly Rent

$850/wk0.0% YoY2026 Q1

Postcode-level

Based on NSW rental bond lodgements, aggregated at postcode level. All SALs sharing this postcode show the same median.

Median House Sale Price

$5,500,000+83.3% YoY2022 Q2

House only

Source: state Valuer-General (suburb-level quarterly medians).

→ Calculate stamp duty on this suburb's median price → Estimate mortgage repayments → Calculate rental yield (price + median rent)

Safety & Crime

2025 Q4

5.9

per 1,000 residents

↓ 75%

vs prior year

Other

3 offences

Reported incidents from NSW police. Offence rates may not reflect all crime.

Population over time — Terrey Hills - Duffys Forest (SA2)

ABS publishes annual estimates only at SA2; Duffys Forest suburb alone is ~509 (Census 2021).

Growth at a Glance

3yr: -3.6%5yr: -6.3%10yr: -4.6%Total: -5.2%

Population grew from 3,789 to 3,593 over 24 years, averaging -0.2% per year.

Government school catchment

Intake zone

Primary

Terrey Hls PS

Secondary

Davidson HS

Source: NSW Department of Education — School Intake Zones. Boundaries can be amended without notice; confirm with the school before relying on enrolment.

Profile

Census snapshot

ABS · 2021

Housing

Almost entirely detached houses (100%), owner-occupied (82%).

Dwelling mix

Houses 100%

151 houses

Tenure

Owned 47%

Mortgage 36%

Renting 18%

Number of bedrooms

1 bed

9 (6.0%)

2 bed

7 (4.7%)

3 bed

22 (14.7%)

4 bed

38 (25.3%)

5 bed

54 (36.0%)

6+ bed

20 (13.3%)

Bushfire & flood risk

Hazard data is not yet available for NSW.

Source when available: NSW Rural Fire Service (BFPL) and NSW DPHI EPI Flood.

Planning zones

3 zones in suburb

Code	Zone	% covered	Area
RU4	ZoneRural	93.4%	4.31 km²
C1	ZoneEnvironmental	3.5%	0.16 km²
RE1	ZoneRecreation	3.1%	0.14 km²

Source: NSW DPHI EPI Land Zoning (ZONE_NSW/2026-04-29/1eccf1a530fa1be5) · As of Apr 2026. Zone boundaries are amended periodically; verify the exact property with the relevant council before relying on permitted use.