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 £264,750 (median £245,000), based on 43 HM Land Registry transactions. Police UK recorded 1 crimes within a 1-mile radius in 2026-03. The average EPC rating across 10 certified properties is 38/100.
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 (28 of the last 43 sales). Energy efficiency here is weaker than average (expect higher running costs and lower mortgage-affordability scores from green lenders).
Avg sale price
£264,750
43 sales
Median price
£245,000
Crime incidents
1
2026-03
Avg EPC score
38/100
10 certs
Recent sold prices
Latest 30 property sales in the LL51 area, sourced from HM Land Registry Price Paid Data.
detached
£276,482
28 sales
semi-detached
£93,000
3 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 |
| 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 |
| Sept 2021 | CAE'R FADOG ISAF, GARNDOLBENMAEN | detached | £550,000 |
Crime in LL51
1 reported crimes within a 1-mile radius of the postcode centroid in 2026-03, from Police UK data.
Criminal Damage Arson
1
Energy performance
Aggregate EPC stats from 10 recently-certified properties in the LL51 area.
Avg current score
38/100
Avg potential
86/100
Avg energy cost
£2,058/yr
Sample size
10
Rating distribution
A
0
B
0
C
1
D
2
E
3
F
1
G
3
Area information
- Local authority
- Gwynedd
- Country
- Wales
- Wards
- Clynnog, Dolbenmaen, Glaslyn
- Constituency
- Dwyfor Meirionnydd
- Latitude
- 52.9739
- Longitude
- -4.2389
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. Counts cover a 1-mile radius from the LL51 postcode centroid for the most recent month available (typically 2 months behind).
EPC: opendatacommunities.org, the official UK Energy Performance Certificate register. Aggregate stats from up to 30 most recent certificates in the postcode.
Area data: postcodes.io, open data from the Office for National Statistics.