| Postcode | LL23 7LN | 
|---|---|
| Post Town | Bala | 
| Nearest station | Betws-y-Coed (24 km) | 
| Bus stops | No nearby bus stops | 
| Number of UPRNs | 23 View | 
| Known addresses | Crynierth Bach, Cefn Ddwysarn Crynierth Mawr, Cefn Ddwysarn Cwm Hwylfod, Cefn Ddwysarn Llwyn Iolyn, Cefn Ddwysarn Ysgubor Fawr, Cefn Ddwysarn | 
| Main property type | Other | 
| Businesses | 
| Latitude | 52.942027 | |
|---|---|---|
| Longitude | -3.549947 | |
| Easting | 295941 | |
| Northing | 339418 | |
| Grid reference | SH959394 | |
| UTM reference | 30U 463043 5865963 | |
| what3words | establish.thirsty.tracks | |
| FixPhrase | crop lunchroom slicing swimwear | |
| Plus code | 9C4RWFR2+R2 | |
| Altitude | 282 metres (925 feet) | |
| Sunrise (today) | 7:10 | |
| Sunset (today) | 16:47 | |
| Distance away | ||
| Distance to sea | 31.6 KMs (19.6 miles) | 
| Parish | Llandderfel | W04000071 | 
|---|---|---|
| Ward | Llandderfel | W05001545 | 
| Unitary Authority | Gwynedd | W06000002 | 
| County | Gwynedd | W11000004 | 
| Constituency (2024) | Dwyfor Meirionnydd | W07000096 | 
| MP | Liz Saville Roberts | Plaid Cymru | 
| Police force | North Wales | |
| Water company | Dwr Cymru Welsh Water | |
| NUTS/ITL 3 | Gwynedd | |
| NUTS/ITL 2 | North Wales | |
| NUTS/ITL 1 | Wales | |
| Country | Wales | W92000004 | 
| Date introduced | January 1980 | 
|---|---|
| Last updated | September 2025 | 
| User type | Small (addresses receive less than 25 items of mail per day) | 
| Quality | Within the building of the matched address closest to the postcode mean | 
| Population (2011) | 28 | |
|---|---|---|
| Households (2011) | 12 | |
| Index of Multiple Deprivation (2019) | Most deprivedLeast deprived | |
| Average household income (2020) | Lowest (£22,200)
                        Highest (£108,100)
                       | |
| Rural/urban (2021) | Smaller rural: Further from a major town or city | |
| Rural/urban (2011) | Rural hamlet and isolated dwellings in a sparse setting | |
| Census output area (2021) | W00000419 | |
| Census output area (2011) | 1C1 | |
| Lower layer super output area (2021) | Gwynedd 015C | W01000082 | 
| Lower layer super output area (2011) | Gwynedd 015C | W01000082 | 
| Middle layer super output area (2021) | Bala & Mawddwy | W02000024 | 
| Middle layer super output area (2011) | Bala & Mawddwy | W02000024 | 
| Travel to work area | Tywyn and Dolgellau | W22000033 | 
| Average property price in Llandudno | £205,971 | 
|---|---|
| Annual change | 1.5% | 
| Address | Type | Date | Price | 
|---|---|---|---|
| Crynierth Mawr, Cefn Ddwysarn | Other (freehold) | Dec 2024 | £450,000 | 
| Other (freehold) | Nov 2021 | £300,000 | |
| Crynierth Bach, Cefn Ddwysarn | Other (freehold) | May 2024 | £610,000 | 
| Ysgubor Fawr, Cefn Ddwysarn | Other (freehold) | Mar 2019 | £415,000 | 
| Cwm Hwylfod, Cefn Ddwysarn | Other (freehold) | Jul 2017 | £187,500 | 
| Llwyn Iolyn, Cefn Ddwysarn | Detached (freehold) | Jan 1999 | £115,000 |