Balgowlah - Clontarf - Seaforth

NSW

Balgowlah - Clontarf - Seaforth is a declining region in NSW with 20,936 residents.

SA2 code: 122011418
State: NSW

Population

20,936

Estimated 2025

5-Year Growth

-0.8%

3yr: +1.6% · 10yr: -0.1%

5-year growth

Median Rent

$697/wk

Census 2021

Median Income

$3,409/wk

Household, Census 2021

Population over time — Balgowlah - Clontarf - Seaforth (SA2)

Source: ABS ERP (latest release · 2025) · Census 2021. Numbers refreshed quarterly.

Growth at a Glance

3yr: +1.6%5yr: -0.8%10yr: -0.1%Total: +13.5%

Population grew from 18,445 to 20,936 over 24 years, averaging 0.5% per year.

Demand & supply signals

Derived signals haven't been computed for this region yet.

Roadmap signals

Two more derived metrics are defined in the platform and waiting on upstream-data orchestration. Each will populate here once its source series is wired through.

Affordability trend

Coming soon

RPPI year-on-year divided by WPI year-on-year. Above 1.0 means home prices are outpacing wages; below 1.0 means wages are catching up.

Awaiting: ABS RPPI (6432.0) + WPI (6345.0) GCCSA-grain orchestration.

Rent–price momentum spread

Coming soon

CPI rents year-on-year minus RPPI year-on-year. Positive means rents are gaining on prices; negative means prices are running ahead of rents.

Awaiting: ABS CPI rents component + RPPI orchestration.

Profile

Census snapshot

ABS · 2021

Housing

Public housing 0.9%

Predominantly detached houses (66.1%), owner-occupied (77.3%).

Dwelling mix

Houses 66.1%

Apartments 20.0%

4,601 houses968 townhouses1,389 apartments

Tenure

Owned 39.3%

Mortgage 38.0%

Renting 21.0%

Owned 39.3%Mortgage 38.0%Renting 21.0%Other / NS 1.7%

Number of bedrooms

1 bed

266 (3.8%)

2 bed

1,306 (18.7%)

3 bed

2,237 (32.0%)

4 bed

2,128 (30.4%)

5 bed

919 (13.1%)

6+ bed

138 (2.0%)