Schools
2 open schools are in scope, including 0 primary and 0 secondary schools. Ysgol Bro Elwern is the nearest published school at 2.3 miles.
Counts describe active establishment records. They do not assess admissions, catchments or quality.
LL21 9SN
Efenechdyd · Denbighshire · Wales
Updated September 2026
Compare this postcodeLocation overview
Drag to pan. Use + or - to zoom. Open larger map
- Post town
- Corwen
- Ward
- Efenechdyd
- Local authority
- Denbighshire
- Constituency
- Bangor Aberconwy
- Postcode district
- LL21
- Postcode sector
- LL21 9
Nearby postcodes
Complete postcode fields and official codes
- Postcode
- LL21 9SN
- Status
- Current
- Introduced
- 1 January 1980
- Terminated
- Not published
- Postcode area
- LL
- Postcode district
- LL21
- Postcode sector
- LL21 9
- Latitude
- 53.038480
- Longitude
- -3.400092
- British National Grid easting
- 306,220
- British National Grid northing
- 349,938
Statistical and administrative geographies
- Country
- Wales · W92000004
- Region
- W99999999
- Local authority district
- Denbighshire · W06000004
- Electoral ward
- Efenechdyd · W05001338
- Parish or community
- W04000152
- Westminster constituency
- Bangor Aberconwy · W07000083
- Output area
- W00001076
- Lower layer super output area
- Denbighshire 015B · W01000202
- Middle layer super output area
- Denbighshire 015 · W02000056
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 LL21
Property
3 recorded
sales at this postcode
| Address | Date | Price |
|---|---|---|
| Glyn Bach, Derwen, Corwen, LL21 9SN | 10 January 2018 | £435,000 |
| Tyn Y Glyn, Derwen, Corwen, LL21 9SN | 12 December 2006 | £121,000 |
| Glyn Bach, Derwen, Corwen, LL21 9SN | 28 April 2003 | £197,500 |
Schools
Within 3.1 miles of this postcode
- Open schools
- 2
- Primary
- 0
- Secondary
- 0
- 3.7 km
Ysgol Bro Elwern
Welsh establishment
- 4.5 km
Ysgol Betws Gwerful Goch
Welsh establishment
Recorded crime
Within 1 mile of this postcode
- Published events
- 2
- Months covered
- 12
- Latest month
- June 2026
Most recorded categories in this period
- Violence and sexual offences 2
Census 2021
Population and age profile
- Postcode residents
- 24
- Postcode households
- 7
- Residents per household
- 3.4
- LL21 9 residents
- 3,536
14 female, 10 male
Age bands in LL21 9
Wider postcode sector- Age 0 to 14
- 15.8%
- Age 15 to 24
- 8.5%
- Age 25 to 44
- 19.5%
- Age 45 to 64
- 29.6%
- Age 65 and over
- 26.5%
579 residents
313 residents
716 residents
1,085 residents
970 residents
This postcode contained 0.7% of the sector's usual residents on Census Day. The age profile describes the wider LL21 9 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+
- 75%
- Ultrafast, 100 Mbit/s+
- 75%
- Ultrafast, 300 Mbit/s+
- 75%
- Gigabit-capable
- 75%
- Unable to receive decent fixed or FWA broadband
- 12.5%
- Next Generation Access
- 75%
- Decent broadband available from fixed wireless
- 0%
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.
Nearby transport
- 0.7 miles
St Mary's Church
BCT · Derwen
- 0.9 miles
Bryn Saith Marchog
BCT · Bryn Saith-Marchog
- 0.9 miles
Bryn Saith Marchog
BCT · Bryn Saith-Marchog
- 1.2 miles
Ty Ucha'r Llyn
BCT · Gwyddelwern
- 1.2 miles
Wern Ddu
BCT · Gwyddelwern
Evidence in context
Recorded crime
2 published events cover 12 months, averaging 0.167 events per published month. The largest recorded category is Violence and sexual offences with 2 events.
The source publishes anonymised street-level events. These figures are not a measure of safety for an individual address.