Property market
The five-year median is £234,000 from 1 recorded sale in LL55 4DY. 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.
LL55 4DY
Cwm-y-glo · Gwynedd · Wales
Updated September 2026
Compare this postcodeLocation overview
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- Post town
- Caernarfon
- Ward
- Cwm-y-glo
- Local authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd
- Postcode district
- LL55
- Postcode sector
- LL55 4
Nearby postcodes
Complete postcode fields and official codes
- Postcode
- LL55 4DY
- Status
- Current
- Introduced
- 1 January 1980
- Terminated
- Not published
- Postcode area
- LL
- Postcode district
- LL55
- Postcode sector
- LL55 4
- Latitude
- 53.139388
- Longitude
- -4.170568
- British National Grid easting
- 254,905
- British National Grid northing
- 362,448
Statistical and administrative geographies
- Country
- Wales · W92000004
- Region
- W99999999
- Local authority district
- Gwynedd · W06000002
- Electoral ward
- Cwm-y-glo · W05001523
- Parish or community
- W04000086
- Westminster constituency
- Dwyfor Meirionnydd · W07000096
- Output area
- W00000316
- Lower layer super output area
- Gwynedd 004B · W01000053
- Middle layer super output area
- Gwynedd 004 · W02000013
Postcode source versions
- Ordnance Survey: Code-Point Open Version 2026-08 · Current postcode units in Great Britain · OGL-3.0
- Office for National Statistics: ONS Postcode Directory Version 2026-08 · United Kingdom; Northern Ireland excluded pending rights review; Crown Dependencies outside product scope · OGL-3.0 with third-party rights
- Ordnance Survey: Boundary-Line Version 2026-05 · Local-authority boundaries in Great Britain · OS OpenData Licence
Explore LL55
Property
20 recorded
sales at this postcode
| Address | Date | Price |
|---|---|---|
| Bryn Difyr, Bro Dawel 2, Cwm-Y-Glo, Caernarfon, LL55 4DY | 24 March 2023 | £234,000 |
| Elidir View, Cwm-Y-Glo, Caernarfon, LL55 4DY | 13 February 2020 | £200,000 |
| Y Bwthyn, 3, Uwchlawr Ffynnon, Cwm-Y-Glo, Caernarfon, LL55 4DY | 27 March 2018 | £95,000 |
Schools
Within 3.1 miles of this postcode
- Open schools
- 8
- Primary
- 0
- Secondary
- 0
- 1.6 km
Ysgol Gymuned Penisarwaun
Welsh establishment
- 1.7 km
Ysgol Llanrug
Welsh establishment
- 1.9 km
Ysgol Brynrefail
Welsh establishment
Recorded crime
Within 1 mile of this postcode
- Published events
- 67
- Months covered
- 12
- Latest month
- June 2026
Most recorded categories in this period
- Violence and sexual offences 28
- Anti social behaviour 13
- Other theft 7
- Criminal damage and arson 7
- Public order 5
Census 2021
Population and age profile
- Postcode residents
- 19
- Postcode households
- 9
- Residents per household
- 2.1
- LL55 4 residents
- 6,211
10 female, 9 male
Age bands in LL55 4
Wider postcode sector- Age 0 to 14
- 16.3%
- Age 15 to 24
- 10.4%
- Age 25 to 44
- 23.7%
- Age 45 to 64
- 27.8%
- Age 65 and over
- 21.8%
1,056 residents
674 residents
1,529 residents
1,796 residents
1,410 residents
This postcode contained 0.3% of the sector's usual residents on Census Day. The age profile describes the wider LL55 4 sector, not people in this individual postcode.
Small counts are adjusted for privacy, so totals can differ slightly between Census tables.
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+
- 80%
- Ultrafast, 100 Mbit/s+
- 80%
- Ultrafast, 300 Mbit/s+
- 80%
- Gigabit-capable
- 80%
- Unable to receive decent fixed or FWA broadband
- 0%
- Next Generation Access
- 80%
- Decent broadband available from fixed wireless
- 90%
Predicted coverage, not measured speeds. Check availability for your address with a provider. Postcode-level full-fibre figures are not published in this release.
Source: Ofcom Connected Nations Spring 2026, version 2026-01-v2. Contains Ofcom data licensed under the Open Government Licence v3.0.
GP practices
2
within 5 km
THE SURGERY
LLANBERIS SURGERY, HIGH STREET, LLANBERIS, CAERNARFON, LL55 4SU
ODS code W94017
3.8 km
LIVERPOOL HOUSE
WAUNFAWR, CAERNARFON, LL55 4YY
ODS code W94039
4.0 km
Main GP practices only; branch surgeries are excluded. Distances are straight-line. Contact the practice to check registration, services, opening hours and appointments.
Source acquired on 2026-09-05. Contains information from NHS England, licenced under the current version of the Open Government Licence.
Nearby transport
- 0.2 miles
Cwm-y-glo
BCT · Cwm-y-glo
- 0.2 miles
Cwm-y-glo
BCT · Cwm-y-glo
- 0.2 miles
Maes Gerddi
BCT · Cwm-y-glo
- 0.2 miles
Maes Gerddi
BCT · Cwm-y-glo
- 0.3 miles
Y Fricsan
BCT · Cwm-y-glo
Evidence in context
Schools
8 open schools are in scope, including 0 primary and 0 secondary schools. Ysgol Gymuned Penisarwaun is the nearest published school at 1.0 miles.
Counts describe active establishment records. They do not assess admissions, catchments or quality.
Recorded crime
67 published events cover 12 months, averaging 5.583 events per published month. The largest recorded category is Violence and sexual offences with 28 events.
The source publishes anonymised street-level events. These figures are not a measure of safety for an individual address.