Seaforth, NSW
Suburb profile from official open data — demographics, market signals, schools and safety.
At a glance
- Population
- 7,384
- Median age
- 42
- Household income
- $4,184/wk
- Owner-occupied
- 82%
- Renting
- 16%
- Socio-economic advantage
- Decile 10/10 in NSW
- Nearest train station
- Crows Nest Station · 5.5 km
- Nearest emergency dept
- Northern Beaches Hospital · 4.9 km
Sources: ABS Census 2021 & SEIFA 2021 (CC BY 4.0); distances are straight-line from the suburb's address centroid.
Property market — real sales
Median house (5 yr)
$3.63m
Median unit (5 yr)
$1.90m
Sales (5 yr)
513
Sales (12 mths)
59
Recorded transactions, NSW Valuer General Property Sales Information (CC BY 4.0). Recent weeks may not be registered yet.
Community safety
160 recorded incidents in 2025 · down 1.2% vs 2024
School catchments (suburb centre)
Primary
Seaforth PS
Secondary
NBSC Balgowlah Boys
Secondary
NBSC Mackellar Girls
Secondary
The Forest HS
Zones at the suburb's address centroid — individual addresses can differ; check any address on PropertyCheck for its exact zones. Source: state education departments (CC BY).
Growth & supply · Balgowlah - Clontarf - Seaforth
District population (2025)
20,936
-0% over 10 years
New homes approved (12 mths to May 2026)
65
houses 25 · other 40
ABS statistical district (SA2) containing the suburb centre (CC BY 4.0).
Sold prices by street
Every recorded transaction, free — the most-traded streets in Seaforth:
- Seaforth Crescent (257)
- Sydney Road (192)
- Peacock Street (153)
- Castle Circuit (146)
- Frenchs Forest Road (140)
- Ethel Street (139)
- Clontarf Street (136)
- Ellery Parade (130)
- Grandview Grove (113)
- Kirkwood Street (101)
- Macmillan Street (99)
- Edgecliffe Esplanade (88)
Check any address in Seaforth
Free value estimate with the comparable evidence behind it — no paywall, no sign-up.
All figures from official open data with attribution; estimates and medians are statistical outputs, not valuations. Suburb boundaries follow ABS Suburbs and Localities (SAL) 2021.