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LL57 4SG

Dewi · Gwynedd · Wales

Updated September 2026

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Location overview

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Post town
Bangor
Ward
Dewi
Local authority
Gwynedd
Constituency
Bangor Aberconwy
Postcode district
LL57
Postcode sector
LL57 4

Nearby postcodes

Nearby postcode distances
Postcode Distance
LL57 4SF 116 m
LL57 4SE 147 m
LL57 4SD 152 m
LL57 4TJ 167 m
LL57 4SB 170 m
Complete postcode fields and official codes
Postcode
LL57 4SG
Status
Current
Introduced
1 January 1980
Terminated
Not published
Postcode area
LL
Postcode district
LL57
Postcode sector
LL57 4
Latitude
53.216491
Longitude
-4.140840
British National Grid easting
257,150
British National Grid northing
370,964

Statistical and administrative geographies

Country
Wales · W92000004
Region
W99999999
Local authority district
Gwynedd · W06000002
Electoral ward
Dewi · W05001527
Parish or community
W04000046
Westminster constituency
Bangor Aberconwy · W07000083
Output area
W00000329
Lower layer super output area
Gwynedd 002A · W01000064
Middle layer super output area
Gwynedd 002 · W02000011

Postcode source versions

Explore LL57

Use the wider postcode district to compare the same evidence across more locations.

Property

At this postcode

View all property records
69 recorded sales at this postcode
Address Date Price
310, Caernarfon Road, Bangor, LL57 4SG 17 April 2026 £140,000
283, Caernarfon Road, Bangor, LL57 4SG 8 August 2025 £165,000
314, Caernarfon Road, Bangor, LL57 4SG 18 July 2025 £125,500

Schools

Within 3.1 miles of this postcode

View all nearby schools
Open schools
19
Primary
0
Secondary
0

  1. Ysgol Tryfan

    Welsh establishment

    604 m

  2. Ysgol Ein Harglwyddes

    Welsh establishment

    661 m

  3. Ysgol Friars

    Welsh establishment

    780 m

Recorded crime

Within 1 mile of this postcode

View all nearby crime records
Published events
1,632
Months covered
12
Latest month
June 2026

Most recorded categories in this period

  • Violence and sexual offences 571
  • Shoplifting 273
  • Anti social behaviour 230
  • Public order 150
  • Criminal damage and arson 120

Census 2021

Population and age profile

Postcode residents
90

44 female, 46 male

Postcode households
40
Residents per household
2.3
LL57 4 residents
5,821

Age bands in LL57 4

Wider postcode sector
Age 0 to 14
16.1%

958 residents

Age 15 to 24
14%

833 residents

Age 25 to 44
25.3%

1,504 residents

Age 45 to 64
26.6%

1,583 residents

Age 65 and over
17.9%

1,067 residents

This postcode contained 1.5% of the sector's usual residents on Census Day. The age profile describes the wider LL57 4 sector, not people in this individual postcode.

How to read these estimates
The standard postcode headcounts and the commissioned age table are separate ONS outputs. Small counts are disclosure-controlled, and totals can differ slightly between tables. Coverage is England and Wales only.

Census Day: 21 March 2021. Sources: ONS/Nomis P001-P004 and ONS CT21_0228. Age table version 2024-04-08.

Fixed broadband coverage

Ofcom's predicted availability across all residential and commercial premises in this postcode in January 2026.

Superfast, 30 Mbit/s+
100%
Ultrafast, 100 Mbit/s+
78.3%
Ultrafast, 300 Mbit/s+
78.3%
Gigabit-capable
78.3%
Unable to receive decent fixed or FWA broadband
0%
Next Generation Access
100%
Decent broadband available from fixed wireless
0%
Coverage is a modelled postcode-level snapshot, not a speed test or a guarantee for a named property. Check availability with providers before making a decision. Ofcom does not publish postcode-level full-fibre coverage in this release for commercial-confidentiality reasons.

Source: Ofcom Connected Nations Spring 2026, version 2026-01-v2. Contains Ofcom data licensed under the Open Government Licence v3.0.

NHS ODS

GP practices

4

within 5 km

  • BODNANT SURGERY

    MENAI AVENUE, BANGOR, LL57 2HH

    ODS code W94010

    1.2 km

  • UPCC AT YSBYTY GWYNEDD

    UPCC AT YSBYTY GWYNEDO, PENRHOSGARNEDD, BANGOR, LL57 2PW

    ODS code W00191

    1.5 km

  • BRON DERW MEDICAL CENTRE

    GLYNNE ROAD, BANGOR, LL57 1AH

    ODS code W94034

    2.0 km

  • GLANFA

    ORME ROAD, BANGOR, LL57 1AY

    ODS code W94040

    2.1 km

Organisation records, not service availability
These are records marked active in NHS England's Organisation Data Service for England and Wales. Branch surgeries, pharmacies, dentists and hospitals are not included. They do not confirm patient registration, services, opening hours, appointments or care quality. Distances are straight-line from the postcode point.

Source acquired on 2026-09-03. Contains information from NHS England, licenced under the current version of the Open Government Licence.

Nearby transport

  • Home Bargains

    BCT · Glan-Adda

    0.0 miles

  • Home Bargains

    BCT · Glan-Adda

    0.0 miles

  • Tan y Graig

    BCT · Glan-Adda

    0.1 miles

  • Glan-Adda

    BCT · Glan-Adda

    0.2 miles

  • Bryn Llwyd

    BCT · Coed Mawr

    0.2 miles

Evidence in context

A factual reading of the data in this report's scope. It is not a location score or a recommendation.

Property market

Recorded sales

The five-year median is £125,500 from 17 recorded sales in LL57 4SG. This is a recorded-sale statistic, not a current valuation.

The latest UK House Price Index average for Gwynedd is £206,665 in June 2026, up 5.7% year on year.

Schools

Published establishments

19 open schools are in scope, including 0 primary and 0 secondary schools. Ysgol Tryfan is the nearest published school at 604 m.

Counts describe active establishment records. They do not assess admissions, catchments or quality.

Recorded crime

Published police records

1,632 published events cover 12 months, averaging 136 events per published month. The largest recorded category is Violence and sexual offences with 571 events.

The source publishes anonymised street-level events. These figures are not a measure of safety for an individual address.