| Postcode | LL55 1SW | 
|---|---|
| Post Town | Caernarfon | 
| Nearest station | Llanfairpwll (10 km) | 
| Bus stops | Bus Station () Victoria Dock (NW) Asda C (NE) Asda B (NE) Asda (NE) | 
| Roads in this postcode | |
| Number of UPRNs | 48 View | 
| Known addresses | Caer Menai, 15 Church Street, Caernarfon Rhan Y Fenai, 8 Church Street, Caernarfon 1 Church Street, Caernarfon 2 Church Street, Caernarfon 4 Church Street, Caernarfon 6 Church Street, Caernarfon 7 Church Street, Caernarfon 8 Church Street, Caernarfon 9 Church Street, Caernarfon 10 Church Street, Caernarfon 11 Church Street, Caernarfon 12 Church Street, Caernarfon 13 Church Street, Caernarfon 14 Church Street, Caernarfon 15 Church Street, Caernarfon 17 Church Street, Caernarfon 18 Church Street, Caernarfon 19 Church Street, Caernarfon 23 Church Street, Caernarfon | 
| Main property type | Terraced | 
| Businesses | 
| Latitude | 53.141181 | |
|---|---|---|
| Longitude | -4.277673 | |
| Easting | 247748 | |
| Northing | 362872 | |
| Grid reference | SH477628 | |
| UTM reference | 30U 414536 5888738 | |
| what3words | aspect.volume.decreased | |
| FixPhrase | crouch lumpiness slashing trapping | |
| Plus code | 9C5Q4PRC+FW | |
| Altitude | 9 metres (31 feet) | |
| Sunrise (today) | 7:14 | |
| Sunset (today) | 16:49 | |
| Distance away | ||
| Distance to sea | 0.6 KMs (0.4 miles) | 
| Parish | Caernarfon | W04000056 | 
|---|---|---|
| Ward | Canol Tref Caernarfon | W05001519 | 
| 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) | 26 | |
|---|---|---|
| Households (2011) | 12 | |
| Index of Multiple Deprivation (2019) | Most deprivedLeast deprived | |
| Average household income (2020) | Lowest (£22,200)
                        Highest (£108,100)
                       | |
| Rural/urban (2021) | Urban: Further from a major town or city | |
| Rural/urban (2011) | Rural town and fringe | |
| Built up area (2024) | Caernarfon | W45000738 | 
| Census output area (2021) | W00000473 | |
| Census output area (2011) | 7D1 | |
| Lower layer super output area (2021) | Gwynedd 006B | W01000093 | 
| Lower layer super output area (2011) | Gwynedd 006B | W01000093 | 
| Middle layer super output area (2021) | Caernarfon East | W02000015 | 
| Middle layer super output area (2011) | Caernarfon East | W02000015 | 
| Travel to work area | Bangor and Holyhead | W22000022 | 
| Average property price in Llandudno | £205,971 | 
|---|---|
| Annual change | 1.5% | 
| Address | Type | Date | Price | 
|---|---|---|---|
| Rhan Y Fenai, 8 Church Street, Caernarfon | Flat (leasehold) | Feb 2025 | £75,000 | 
| Flat (leasehold) | Aug 2021 | £75,000 | |
| 11 Church Street, Caernarfon | Semi-detached (freehold) | Feb 2024 | £305,000 | 
| Semi-detached (freehold) | Dec 2004 | £230,000 | |
| 17 Church Street, Caernarfon | Terraced (freehold) | Nov 2023 | £383,000 | 
| Terraced (freehold) | Apr 2012 | £177,500 | |
| 8 Church Street, Caernarfon | Flat (leasehold) | Jun 2023 | £159,995 | 
| Flat (leasehold) | Aug 2021 | £75,000 | |
| Terraced (freehold) | Aug 2019 | £215,000 | |
| Terraced (freehold) | Apr 2013 | £210,000 | |
| Terraced (freehold) | Dec 1997 | £75,000 | |
| Caer Menai, 15 Church Street, Caernarfon | Other (freehold) | Oct 2022 | £435,000 | 
| Semi-detached (freehold) | Dec 2009 | £360,000 | |
| 14 Church Street, Caernarfon | Terraced (freehold) | Jun 2020 | £216,000 | 
| Terraced (freehold) | Jun 2000 | £52,000 | |
| 1 Church Street, Caernarfon | Terraced (freehold) | Apr 2020 | £198,000 | 
| 9 Church Street, Caernarfon | Terraced (freehold) | Nov 2019 | £200,000 | 
| 12 Church Street, Caernarfon | Terraced (freehold) | Sep 2018 | £275,000 | 
| Terraced (freehold) | Feb 2015 | £223,405 | |
| Terraced (freehold) | Aug 2010 | £209,000 | |
| Terraced (freehold) | Jun 2004 | £30,000 | |
| 18 Church Street, Caernarfon | Terraced (freehold) | Apr 2018 | £165,000 |