| Postcode | SY23 1EB | 
|---|---|
| Post Town | Aberystwyth, Llanon, Llanrhystud | 
| Nearest station | Aberystwyth (0 km) | 
| Bus stops | Mill Street (SW) Great Darkgate Street Top (NE) Great Darkgate Street (NE) Cambrian Place (N) Pier Street (SE) Yr Hen Ysgol Gymraeg (SW) | 
| Roads in this postcode | |
| Number of UPRNs | 10 View | 
| Known addresses | 1 Plas Mair, William Street, Aberystwyth 2 Plas Mair, William Street, Aberystwyth 3 Plas Mair, William Street, Aberystwyth 5 Plas Mair, William Street, Aberystwyth 6 Plas Mair, William Street, Aberystwyth 7 Plas Mair, William Street, Aberystwyth 8 Plas Mair, William Street, Aberystwyth | 
| Main property type | Flat | 
| Businesses | 
                        No businesses found
                     | 
| Latitude | 52.413148 | |
|---|---|---|
| Longitude | -4.085126 | |
| Easting | 258277 | |
| Northing | 281507 | |
| Grid reference | SN582815 | |
| UTM reference | 30U 426194 5807545 | |
| what3words | backpacks.friends.aside | |
| FixPhrase | critter lumpish sedate thumb | |
| Plus code | 9C4QCW77+7W | |
| Altitude | 16 metres (51 feet) | |
| Sunrise (today) | 7:11 | |
| Sunset (today) | 16:50 | |
| Distance away | ||
| Distance to sea | 0 KMs (0 miles) | 
| Parish | Aberystwyth | W04000359 | 
|---|---|---|
| Ward | Aberystwyth Morfa a Glais | W05001300 | 
| Unitary Authority | Ceredigion | W06000008 | 
| County | Dyfed | W11000002 | 
| Constituency (2024) | Ceredigion Preseli | W07000093 | 
| MP | Ben Lake | Plaid Cymru | 
| Police force | Dyfed-Powys | |
| Water company | Dwr Cymru Welsh Water | |
| NUTS/ITL 3 | Mid Wales | |
| NUTS/ITL 2 | Mid and South West Wales | |
| NUTS/ITL 1 | Wales | |
| Country | Wales | W92000004 | 
| Date introduced | July 1995 | 
|---|---|
| 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) | 16 | |
|---|---|---|
| Households (2011) | 8 | |
| 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) | Urban city and town in a sparse setting | |
| Built up area (2024) | Aberystwyth | W45000858 | 
| Census output area (2021) | W00002743 | |
| Census output area (2011) | 2A2 | |
| Lower layer super output area (2021) | Ceredigion 002B | W01000513 | 
| Lower layer super output area (2011) | Ceredigion 002B | W01000513 | 
| Middle layer super output area (2021) | Aberystwyth North | W02000117 | 
| Middle layer super output area (2011) | Aberystwyth North | W02000117 | 
| Travel to work area | Aberystwyth | W22000021 | 
| Average property price in Shrewsbury | £264,180 | 
|---|---|
| Annual change | 0.9% | 
| Address | Type | Date | Price | 
|---|---|---|---|
| 3 Plas Mair, William Street, Aberystwyth | Flat (leasehold) | Feb 2022 | £142,000 | 
| Flat (leasehold) | May 2018 | £132,000 | |
| New build flat (leasehold) | Jan 1995 | £55,000 | |
| 8 Plas Mair, William Street, Aberystwyth | Flat (leasehold) | Sep 2021 | £120,000 | 
| Flat (leasehold) | Apr 2009 | £140,000 | |
| New build flat (leasehold) | Jul 1995 | £55,000 | |
| 2 Plas Mair, William Street, Aberystwyth | Terraced (freehold) | Sep 2013 | £177,500 | 
| New build flat (freehold) | May 1995 | £65,000 | |
| 1 Plas Mair, William Street, Aberystwyth | Semi-detached (freehold) | Sep 2002 | £119,950 | 
| 6 Plas Mair, William Street, Aberystwyth | Flat (leasehold) | Feb 2001 | £58,500 | 
| New build flat (leasehold) | Apr 1995 | £55,000 | |
| 7 Plas Mair, William Street, Aberystwyth | Flat (leasehold) | Sep 2000 | £60,000 | 
| Flat (leasehold) | Dec 1995 | £53,000 | |
| 5 Plas Mair, William Street, Aberystwyth | New build flat (leasehold) | Feb 1995 | £55,000 |