LL51 Postcode Data
Property data for the LL51 postcode district covering Gwynedd. Sold prices, crime statistics, energy performance, and demographic insights, all from HM Land Registry, Police UK, and the EPC Register.
Quick answer
The average sale price in LL51 is £249,006 (median £227,500), based on 56 HM Land Registry transactions. Police UK recorded 1 crimes within a 1-mile radius in 2026-05.
Headline pricing in LL51 is broadly in line with the UK national average (England & Wales average ~£290k as of 2025). Stock is dominated by detached properties (34 of the last 56 sales).
Avg sale price
£249,006
56 sales
Median price
£227,500
Crime incidents
1
2026-05
Avg EPC score
n/a
83 certs
Recent sold prices
Latest 30 property sales in the LL51 area, sourced from HM Land Registry Price Paid Data.
detached
£265,191
34 sales
semi-detached
£89,888
8 sales
terraced
£86,750
2 sales
| Date | Address | Type | Price |
|---|---|---|---|
| Oct 2024 | CAE EITHIN TEW, GARNDOLBENMAEN | detached | £458,000 |
| Jul 2024 | CAE EITHIN TEW, GARNDOLBENMAEN | other | £250 |
| Jan 2024 | CAE GLANRAFON, GARNDOLBENMAEN | detached | £350,000 |
| Dec 2023 | TRAWSCOED, GARNDOLBENMAEN | detached | £480,000 |
| Dec 2023 | BEUDY'R GARTH, GARNDOLBENMAEN | detached | £435,000 |
| Nov 2023 | BEUDY PARC, GARNDOLBENMAEN | detached | £380,000 |
| Sept 2023 | DOLWGAN ISAF, GARNDOLBENMAEN | other | £615,000 |
| Aug 2023 | BRON HENDRE, GARNDOLBENMAEN | other | £600,000 |
| Jun 2023 | GORFFWYSFA, GARNDOLBENMAEN | terraced | £91,000 |
| May 2023 | TYNLLAN, GARNDOLBENMAEN | detached | £395,000 |
| Oct 2022 | ERW SURAN, GARNDOLBENMAEN | detached | £435,000 |
| Aug 2022 | 1, BRO NANTCYLL, GARNDOLBENMAEN | semi-detached | £85,000 |
| Jun 2022 | BRYN MARSLI, GARNDOLBENMAEN | detached | £470,000 |
| Feb 2022 | ISALLTBACH, GARNDOLBENMAEN | other | £10,000 |
| Feb 2022 | ISALLTBACH, GARNDOLBENMAEN | detached | £295,000 |
Crime in LL51
1 reported crimes within a 1-mile radius of the postcode centroid in 2026-05, from Police UK data.
Violent Crime
1
Energy performance
Aggregate EPC stats from 83 recently-certified properties in the LL51 area.
Sample size
83
Rating distribution
A
3
B
4
C
14
D
8
E
24
F
17
G
13
Area information
- Local authority
- Gwynedd
- Country
- Wales
- Wards
- Clynnog, Dolbenmaen, Glaslyn
- Constituency
- Dwyfor Meirionnydd
- Latitude
- 52.9740
- Longitude
- -4.2390
More for LL51
Typical property
What the typical LL51 property looks like
Area summary, buyer notes, researched facts
Council tax
Gwynedd 2025/26 rates
All bands, monthly cost, discounts
Sold prices tool
Full transaction history for LL51
HM Land Registry from 1995
Corporate freeholders
Companies registered in LL51
Live Companies House data + PSCs
EPC checker
Look up any LL51 address
Energy ratings + improvement options
Crime checker
Local breakdown for LL51
Police UK monthly data
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Get a Property ReportData sources & methodology
Sold prices: HM Land Registry Price Paid Data, the official UK government records updated monthly. Sample uses the 30 most recent registered transactions in the postcode area.
Crime: Police UK street-level crime data, covering a 1-mile radius from the LL51 postcode centroid for the most recent month available (typically 2 months behind). For Scottish postcodes we use Police Scotland recorded-crime counts published by the Scottish Government (2024-25), reported by council area.
EPC: opendatacommunities.org, the official Energy Performance Certificate register for England and Wales. Aggregate stats from up to 30 most recent certificates in the postcode. For Scottish postcodes we use Scottish EPC Register lodgements, aggregated to a council-level band distribution (Q2 2025 to Q1 2026). For Northern Ireland we use the NISRA Census 2021 EPC-band classification of every household, aggregated by council (Census 2021).
Area data: postcodes.io, open data from the Office for National Statistics.