| Postcode | SA9 1RX | 
|---|---|
| Post Town | Swansea | 
| Nearest station | Neath (15 km) | 
| Bus stops | Primary School (NE) Peniel Chapel (SW) Penrhos Estate (NE) Hendreladus (SW) | 
| Roads in this postcode | |
| Number of UPRNs | 5 View | 
| Known addresses | 4 James Street, Ynysisaf Ystradgynlais 7 James Street, Ynysisaf Ystradgynlais | 
| Main property type | Terraced | 
| Businesses | 
                        No businesses found
                     | 
| Latitude | 51.789527 | |
|---|---|---|
| Longitude | -3.748151 | |
| Easting | 279524 | |
| Northing | 211543 | |
| Grid reference | SN795115 | |
| UTM reference | 30U 448398 5737893 | |
| what3words | visions.forces.amps | |
| FixPhrase | crinkly lunchbox subsonic unguarded | |
| Plus code | 9C3RQ7Q2+RP | |
| Altitude | 101 metres (331 feet) | |
| Sunrise (today) | 7:08 | |
| Sunset (today) | 16:51 | |
| Distance away | ||
| Distance to sea | 18.8 KMs (11.7 miles) | 
| Parish | Ystradgynlais | W04000356 | 
|---|---|---|
| Ward | Aber-craf and Ystradgynlais | W05001117 | 
| Unitary Authority | Powys | W06000023 | 
| County | Powys | W11000006 | 
| Constituency (2024) | Brecon, Radnor and Cwm Tawe | W07000085 | 
| MP | David Chadwick | Liberal Democrat | 
| 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 | June 1998 | 
|---|---|
| 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) | 4 | |
|---|---|---|
| Households (2011) | 3 | |
| Index of Multiple Deprivation (2019) | Most deprivedLeast deprived | |
| Average household income (2020) | Lowest (£22,200)
                        Highest (£108,100)
                       | |
| Rural/urban (2021) | Urban: Nearer to a major town or city | |
| Rural/urban (2011) | Rural hamlet and isolated dwellings | |
| Built up area (2024) | Ystradgynlais | W45000983 | 
| Census output area (2021) | W00002269 | |
| Census output area (2011) | 1B1 | |
| Lower layer super output area (2021) | Powys 021A | W01000426 | 
| Lower layer super output area (2011) | Powys 021A | W01000426 | 
| Middle layer super output area (2021) | Ystradgynlais & Tawe Uchaf | W02000416 | 
| Middle layer super output area (2011) | Ystradgynlais & Tawe Uchaf | W02000416 | 
| Travel to work area | Swansea | W22000032 | 
| Average property price in Swansea | £199,131 | 
|---|---|
| Annual change | 2.4% | 
| Address | Type | Date | Price | 
|---|---|---|---|
| 7 James Street, Ynysisaf Ystradgynlais | Terraced (freehold) | Mar 2021 | £120,000 | 
| Terraced (freehold) | Sep 2020 | £150,950 | |
| New build terraced (freehold) | Oct 2004 | £42,000 | |
| 4 James Street, Ynysisaf Ystradgynlais | Terraced (freehold) | Apr 2003 | £59,000 |