Largs Bay vs Semaphore

Largs Bay is the younger of the two, with a median age of 46 against 50 in Semaphore. In both, most households own their home and most homes are detached houses. Houses cost more in Semaphore: a median of $1.25 million, against $1.14 million in Largs Bay. Semaphore is closer to the city centre: 16.7 km, against 22 km.

Which one suits you?

There is no overall winner — the suburb that suits a family with school-age kids is routinely the wrong one for someone commuting into the city. So each of these answers its own question, against a checklist you can see, using the same figures in the tables below.

Families with school-age kids

Largs Bay

ahead on 2 of the 6 things we measure here

  • has more separate houses rather than flats (82% vs 65%)
  • is already more of a family suburb (58% vs 48%)

Weighs schools, house stock, crime, parks, childcare, and who already lives there.

First-home buyers

Too close to call

Nothing among the 3 things we measure here separates them by enough to be worth acting on.

Weighs house prices, unit prices, and mortgage stress.

Renters

Too close to call

Nothing among the 3 things we measure here separates them by enough to be worth acting on.

Weighs rent, rental stress, and how much is for rent.

Commuting to the city

Semaphore

ahead on 2 of the 4 things we measure here

  • sits closer to the CBD (16.7 km vs 22 km)
  • is more walkable (79/100 vs 62/100)

Weighs distance, drive time, rail access, and walkability.

Downsizers and retirees

Semaphore

ahead on 2 of the 5 things we measure here

  • has more units and townhouses to downsize into (35% vs 17%)
  • is more walkable (79/100 vs 62/100)

Weighs smaller dwellings, who already lives there, GPs, walkability, and crime.

Investors

Too close to call

Nothing among the 1 things we measure here separates them by enough to be worth acting on.

Weighs population growth.

Where they sit

Largs Bay and Semaphore drawn to the same scale. Both outlines are shown together, so the map answers whether they share a border and how their areas compare.

Largs Bay Semaphore
Hides rows where both suburbs match

Bars start at zero. Scores, risks and rankings are drawn against their full 0–100 range; other rows are drawn in proportion to the larger of the two.

Side by side, out of 100

Risks are inverted — shown as safety and low exposure — so a longer bar always means better.

Largs Bay Semaphore
Walkability 62 / 79
Largs Bay — Walkability: 62/100 Semaphore — Walkability: 79/100
Safety 22 / 22
Largs Bay — Safety: 22/100 Semaphore — Safety: 22/100
Low fire risk 100 / 100
Largs Bay — Low fire risk: 100/100 Semaphore — Low fire risk: 100/100
Low flood risk 19 / 21
Largs Bay — Low flood risk: 19/100 Semaphore — Low flood risk: 21/100

Demographics

Largs Bay has more residents (4,104 vs 2,749); Semaphore skews older (50 vs 46).

Largs Bay Semaphore
Population 4,104
+33% vs other
 2,749
Population trend (2016 → 2021) +0.6% -0.5%
Median age 46 50
Median household income $98,072/yr
+9% vs other
 $89,336/yr
Median weekly rent $315/wk $320/wk
+2% vs other

Age profile

Share of residents in each band, 2021 Census.

Largs Bay Semaphore
0-4 5.2% / 3.2%
Largs Bay — 0-4: 5.2% Semaphore — 0-4: 3.2%
5-14 9.8% / 8.2%
Largs Bay — 5-14: 9.8% Semaphore — 5-14: 8.2%
15-19 5.2% / 4.6%
Largs Bay — 15-19: 5.2% Semaphore — 15-19: 4.6%
20-24 5.4% / 4.6%
Largs Bay — 20-24: 5.4% Semaphore — 20-24: 4.6%
25-34 10.0% / 9.5%
Largs Bay — 25-34: 10.0% Semaphore — 25-34: 9.5%
35-44 12.0% / 11.1%
Largs Bay — 35-44: 12.0% Semaphore — 35-44: 11.1%
45-54 14.5% / 17.4%
Largs Bay — 45-54: 14.5% Semaphore — 45-54: 17.4%
55-64 16.5% / 21.2%
Largs Bay — 55-64: 16.5% Semaphore — 55-64: 21.2%
65-74 11.3% / 13.2%
Largs Bay — 65-74: 11.3% Semaphore — 65-74: 13.2%
75-84 5.3% / 5.0%
Largs Bay — 75-84: 5.3% Semaphore — 75-84: 5.0%
85+ 4.8% / 1.9%
Largs Bay — 85+: 4.8% Semaphore — 85+: 1.9%

Bars are drawn against the largest share shown (21.2%).

Who lives together

Household composition, 2021 Census.

Largs Bay 37.5% lone person
Largs Bay — Lone Person: 37.5% Largs Bay — Couple Families: 43.3% Largs Bay — One Parent Families: 14.3% Largs Bay — Group Household: 3.6% Largs Bay — Other Families: 1.2%
Semaphore 44.4% lone person
Semaphore — Lone Person: 44.4% Semaphore — Couple Families: 33.1% Semaphore — One Parent Families: 15.0% Semaphore — Group Household: 4.8% Semaphore — Other Families: 2.7%
Lone Person Couple Families One Parent Families Group Household Other Families

Who owns and who rents

Occupied private dwellings by tenure, 2021 Census.

Largs Bay 20.9% renting
Largs Bay — Owned Outright: 35.0% Largs Bay — Mortgage: 44.0% Largs Bay — Renting: 20.9%
Semaphore 30.7% renting
Semaphore — Owned Outright: 35.6% Semaphore — Mortgage: 33.7% Semaphore — Renting: 30.7%
Owned outright Mortgage Renting

Where residents were born

Largest overseas birthplaces, as a share of all residents, 2021 Census. A dash means that country is not among the suburb's own eight largest.

Largs Bay Semaphore
England 6.6% / 8.0%
Largs Bay — England: 6.6% Semaphore — England: 8.0%
New Zealand 1.0% / 1.5%
Largs Bay — New Zealand: 1.0% Semaphore — New Zealand: 1.5%
Scotland 1.1% / 1.2%
Largs Bay — Scotland: 1.1% Semaphore — Scotland: 1.2%
Germany 0.7% / 0.8%
Largs Bay — Germany: 0.7% Semaphore — Germany: 0.8%
Italy 0.5% / 0.9%
Largs Bay — Italy: 0.5% Semaphore — Italy: 0.9%

Bars are drawn against the largest share shown (8.0%).

Qualifications

Highest non-school qualification, residents 15+, 2021 Census.

Largs Bay Semaphore
Certificate III & IV 15.9% / 15.3%
Largs Bay — Certificate III & IV: 15.9% Semaphore — Certificate III & IV: 15.3%
Bachelor Degree 12.8% / 15.7%
Largs Bay — Bachelor Degree: 12.8% Semaphore — Bachelor Degree: 15.7%
Advanced Diploma / Diploma 8.2% / 9.2%
Largs Bay — Advanced Diploma / Diploma: 8.2% Semaphore — Advanced Diploma / Diploma: 9.2%
Postgraduate Degree 4.3% / 6.9%
Largs Bay — Postgraduate Degree: 4.3% Semaphore — Postgraduate Degree: 6.9%
Graduate Diploma / Certificate 2.7% / 3.2%
Largs Bay — Graduate Diploma / Certificate: 2.7% Semaphore — Graduate Diploma / Certificate: 3.2%

Bars are drawn against the largest share shown (15.9%).

What people live in

Occupied private dwellings by structure, 2021 Census.

Largs Bay 82.5% houses
Largs Bay — Houses: 82.5% Largs Bay — Townhouses: 6.4% Largs Bay — Flats / Apartments: 11.0%
Semaphore 65.2% houses
Semaphore — Houses: 65.2% Semaphore — Townhouses: 22.9% Semaphore — Flats / Apartments: 11.9%
Houses Townhouses Flats / Apartments

Property market

Largs Bay Semaphore
Median house price $1,140,000 $1,250,000
Median unit price $610,000 $630,000
Median land price — $866,000
Typical days to sell (houses) 21 days
from 30 sales
 22 days
from 36 sales

House price by bedroom count

Only bed counts both suburbs published enough sales for. Sale counts are shown because the buckets differ in depth.

Largs Bay Semaphore
2 bed $800K / $835K
Largs Bay — 2 bed: $800K (5 sales) Semaphore — 2 bed: $835K (15 sales)

5 vs 15 sales

3 bed $999K / $1.25M
Largs Bay — 3 bed: $999K (26 sales) Semaphore — 3 bed: $1.25M (30 sales)

26 vs 30 sales

4 bed $1.49M / $1.5M
Largs Bay — 4 bed: $1.49M (20 sales) Semaphore — 4 bed: $1.5M (22 sales)

20 vs 22 sales

5 bed $1.77M / $1.91M
Largs Bay — 5 bed: $1.77M (6 sales) Semaphore — 5 bed: $1.91M (7 sales)

6 vs 7 sales

Zoning mix

Largs Bay has more industrially zoned land (23% vs 0%); Semaphore has more commercially zoned land (12% vs 1%).

Largs Bay Semaphore
Residential 71% 74%
Industrial 23% 0%
Parks and recreation 5% 14%
Commercial 1% 12%
Zoning sets what may be built, not what is there today. A single address can sit in a different zone to the suburb around it. Zones as at 2026-09.

Development activity

Largs Bay Semaphore
New dwellings approved 1,176
across Port Adelaide Enfield
same for both
Approvals change year on year +23%
same for both

Ranking within SA

Largs Bay Semaphore
House price Higher than 46% of SA Higher than 73% of SA
Income Higher than 77% of SA Higher than 68% of SA
Schools —
same for both
Walkability Higher than 85% of SA Higher than 92% of SA
Affordability Higher than 77% of SA Higher than 26% of SA
EV adoption Higher than 69% of SA Higher than 81% of SA
NBN connectivity Higher than 80% of SA Higher than 81% of SA

Liveability

Semaphore is more walkable (79 vs 62); Semaphore scores higher overall (52 vs 45).

Largs Bay Semaphore
Grade C B
Score 45/100 52/100
Socio-economic band advantaged area
decile 7/10
same for both

Risk profile

Largs Bay Semaphore
Bushfire None
0/100
same for both
Crime High
78/100
same for both
Flood High
81/100
 High
79/100
Coastal erosion None
0/100
 High
86/100
Aircraft noise None
0/100
same for both
Industrial facilities nearby 19
within 5 km
 14
within 5 km

Schools

Largs Bay Semaphore
Inside the suburb 1
same for both
Rated above peers 0
same for both
Rated at peers 1
same for both
Rated below peers 0
same for both

Schools in Largs Bay

  • Largs Bay School Government · Primary at peers

Schools in Semaphore

  • Dominican School Catholic · Primary at peers

Amenities in the suburb

Largs Bay Semaphore
Supermarkets 0 2
Cafes & restaurants 3 20
Parks & reserves 0 1
Childcare 1
same for both
GPs 0 1
Pharmacies 1 3
Banks & Bank@Post 1
same for both
Fuel stations 3 0
EV chargers 1
same for both

Mobility

Largs Bay sits further from the CBD (22 km vs 16.7 km).

Largs Bay Semaphore
Walkability score 62/100 79/100
Distance to Adelaide 22 km
+24% vs other
 16.7 km
Drive time (normal traffic) 26 min 27 min
Public transport score 91/100
Rail · Bus
 73/100
Bus
Peak arrivals per hour 40.5
7-9am + 5-7pm
 26.0
7-9am + 5-7pm
Median peak wait 1 min
scheduled, not actual
same for both
Electric vehicle share 0.8%
postcode 5016
 1.2%
postcode 5019
Rooftop solar per 100 dwellings 58
postcode 5016
 52
postcode 5019

How people get to work

Method of travel on census day 2021 — which fell during COVID restrictions, so working from home is inflated and every travel mode understated.

Largs Bay Semaphore
Car (driver) 73.7% / 71.5%
Largs Bay — Car (driver): 73.7% Semaphore — Car (driver): 71.5%
Worked from Home 11.7% / 14.8%
Largs Bay — Worked from Home: 11.7% Semaphore — Worked from Home: 14.8%
Train 6.1% / 4.1%
Largs Bay — Train: 6.1% Semaphore — Train: 4.1%
Car (passenger) 4.6% / 4.0%
Largs Bay — Car (passenger): 4.6% Semaphore — Car (passenger): 4.0%
Walked Only 1.4% / 2.8%
Largs Bay — Walked Only: 1.4% Semaphore — Walked Only: 2.8%

Bars are drawn against the largest share shown (73.7%).

Setting

Largs Bay Semaphore
Elevation 7 m
above sea level, at the suburb centre
 13 m
above sea level, at the suburb centre
Distance to the ocean 876 m
3.7 km to a named beach
 465 m
2.0 km to a named beach

NBN connectivity

Largs Bay Semaphore
Connectivity score 66/100 67/100
Most common technology Fibre to the node
same for both
Full-fibre (FTTP) share 39%
1,989 premises
 40%
1,523 premises

Climate

Largs Bay Semaphore
Annual rainfall 404 mm 394 mm
Summer max (Jan) 30.4°C 28.1°C
Winter min (Jul) 6.5°C 7.8°C

Air quality (annual mean)

Largs Bay Semaphore
PM2.5 4.5 µg/m³
same for both
PM10 20.3 µg/m³
same for both
NO₂ —
same for both

Council rates

Largs Bay Semaphore
Average residential rate $1,311/yr
same for both
Council Port Adelaide Enfield
same for both

Federal electorate

Largs Bay Semaphore
Division Hindmarsh
same for both
Member Mark Butler
same for both
Party Australian Labor Party
same for both

First Home Owner Grant

Largs Bay Semaphore
Grant amount $15,000
same for both
Property price cap —
same for both
Eligibility New
same for both

Tags

Largs Bay

Coastal Middle-Ring Trains Transport Hub

Semaphore

Coastal Middle-Ring Parks Townhouses

More comparisons

Other comparisons with Largs Bay

Largs Bay vs Largs North Largs Bay vs Birkenhead Largs Bay vs Port Adelaide Largs Bay vs Peterhead Largs Bay vs Exeter

Other comparisons with Semaphore

Semaphore vs Ethelton Semaphore vs Exeter Semaphore vs Semaphore South Semaphore vs Glanville
Full data on Largs Bay Full data on Semaphore
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Information shown is provided as-is from Australian government and commercial data sources.
Always verify with the relevant authority before making property decisions.
See Data Sources and How We Calculate for details.

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