| Postcode | LL59 5SP | 
|---|---|
| Post Town | Menai Bridge | 
| Nearest station | Llanfairpwll (6 km) | 
| Bus stops | No nearby bus stops | 
| Roads in this postcode | |
| Number of UPRNs | 17 View | 
| Known addresses | Parc Mawr, Llansadwrn Plas Trefor, Llansadwrn 1 Llys Trefor Barns, Llansadwrn 2 Llys Trefor Barns, Llansadwrn 3 Llys Trefor Barns, Llansadwrn | 
| Main property type | Detached | 
| Businesses | 
| Latitude | 53.274348 | |
|---|---|---|
| Longitude | -4.176923 | |
| Easting | 254937 | |
| Northing | 377474 | |
| Grid reference | SH549774 | |
| UTM reference | 30U 421519 5903436 | |
| what3words | save.canny.revamping | |
| FixPhrase | crouton lumping stiffly twentieth | |
| Plus code | 9C5Q7RFF+P6 | |
| Altitude | 100 metres (329 feet) | |
| Sunrise (today) | 7:14 | |
| Sunset (today) | 16:48 | |
| Distance away | ||
| Distance to sea | 3 KMs (1.9 miles) | 
| Parish | Cwm Cadnant | W04000869 | 
|---|---|---|
| Ward | Seiriol | W05001501 | 
| 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) | 19 | |
|---|---|---|
| Households (2011) | 6 | |
| 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 village | |
| Census output area (2021) | W00000062 | |
| Census output area (2011) | 1A3 | |
| Lower layer super output area (2021) | Isle of Anglesey 005B | W01000013 | 
| Lower layer super output area (2011) | Isle of Anglesey 005B | W01000013 | 
| Middle layer super output area (2021) | Beaumaris & Benllech | W02000005 | 
| Middle layer super output area (2011) | Beaumaris & Benllech | W02000005 | 
| Travel to work area | Bangor and Holyhead | W22000022 | 
| Average property price in Llandudno | £205,971 | 
|---|---|
| Annual change | 1.5% | 
| Address | Type | Date | Price | 
|---|---|---|---|
| Plas Trefor, Llansadwrn | Other (freehold) | Nov 2021 | £1,495,000 | 
| Detached (freehold) | Nov 2005 | £845,000 | |
| 3 Llys Trefor Barns, Llansadwrn | Terraced (freehold) | Jan 2013 | £345,000 | 
| Detached (freehold) | Jan 2009 | £305,000 | |
| 1 Llys Trefor Barns, Llansadwrn | Terraced (freehold) | Apr 2009 | £319,000 | 
| 2 Llys Trefor Barns, Llansadwrn | Detached (freehold) | Feb 2009 | £285,000 | 
| Parc Mawr, Llansadwrn | Detached (freehold) | Dec 2003 | £348,000 |