| Postcode | LL77 7UF | 
|---|---|
| Post Town | Rhosneigr, Llangefni | 
| Nearest station | Llanfairpwll (9 km) | 
| Bus stops | 
                       No nearby bus stops 
                     | 
                  
| Number of UPRNs | 3 View | 
| Known addresses | 
                       Cerrig Tyrn, Tregaian 
                            Refail Cerrig Tyrn, Tregaian 
                       | 
                  
| Main property type | Detached | 
| Businesses | 
                     
                        No businesses found
                     
                   | 
                
| Latitude | 53.280177 | |
|---|---|---|
| Longitude | -4.306797 | |
| Easting | 246299 | |
| Northing | 378394 | |
| Grid reference | SH462783 | |
| UTM reference | 30U 412871 5904235 | |
| what3words | digit.splints.comically | |
| FixPhrase | crouton luminous strength treadmill | |
| Plus code | 9C5Q7MJV+37 | |
| Altitude | 70 metres (229 feet) | |
| Sunrise (today) | 7:22 | |
| Sunset (today) | 16:41 | |
| Distance away | ||
| Distance to sea | 6.9 KMs (4.3 miles) | 
| Parish | Llanddyfnan | W04000014 | 
|---|---|---|
| Ward | Canolbarth Môn | W05001496 | 
| Unitary Authority | Isle of Anglesey | W06000001 | 
| County | Gwynedd | W11000004 | 
| Constituency (2024) | Ynys Môn | W07000112 | 
| MP | Llinos Medi | Plaid Cymru | 
| Police force | North Wales | |
| Water company | Dwr Cymru Welsh Water | |
| NUTS/ITL 3 | Isle of Anglesey | |
| 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) | 2 | |
|---|---|---|
| Households (2011) | 1 | |
| 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) | W00000098 | |
| Census output area (2011) | 1A3 | |
| Lower layer super output area (2021) | Isle of Anglesey 002E | W01002005 | 
| Lower layer super output area (2011) | Isle of Anglesey 002B | W01000020 | 
| Middle layer super output area (2021) | Rhos-y-bol, Marian-glas & Moelfre | W02000002 | 
| Middle layer super output area (2011) | Rhos-y-bol, Marian-glas & Moelfre | W02000002 | 
| Travel to work area | Bangor and Holyhead | W22000022 | 
| Average property price in Llandudno | £206,073 | 
|---|---|
| Annual change | 1.4% | 
| Address | Type | Date | Price | 
|---|---|---|---|
| Refail Cerrig Tyrn, Tregaian | Detached (freehold) | May 2018 | £130,000 | 
| Cerrig Tyrn, Tregaian | New build detached (freehold) | Apr 1999 | £102,000 |