SA31 3SD maps, stats, and open data
SA31 3SD lies on Pen Y Cae in Johnstown, Carmarthen. SA31 3SD is located in the Carmarthen Town West electoral ward, within the unitary authority of Carmarthenshire and the Welsh Parliamentary constituency of Carmarthen West and South Pembrokeshire. The Local Health Board is Hywel Dda University and the police force is Dyfed-Powys. This postcode has been in use since June 1998.
SA31 3SD maps
Source: OS VectorMap District (Ordnance Survey)
Licence: Open Government Licence (requires attribution)
SA31 3SD geodata
| Easting | 238859 |
| Northing | 219481 |
| Latitude | 51.850600 |
| Longitude | -4.340975 |
Where is SA31 3SD?
| Street | Pen Y Cae |
| Locality | Johnstown |
| Town/City | Carmarthen |
| Country | Wales |
| Postcode District | SA31 |
SA31 3SD Elevation
Elevation or altitude of SA31 3SD as distance above sea level:
| Metres | Feet | |
|---|---|---|
| Elevation | 30m | 98ft |
Elevation is measured from the approximate centre of the postcode, to the nearest point on an OS contour line from OS Terrain 50, which has contour spacing of ten vertical metres.
➜ How high above sea level am I? Find the elevation of your current position using your device's GPS.
Politics
| Ward | Carmarthen Town West |
|---|---|
| Constituency | Carmarthen West And South Pembrokeshire |
House Prices
Sales of detached houses in SA31 3SD
10, PEN Y CAE, JOHNSTOWN, CARMARTHEN, SA31 3SD 2025 11 AUG £267,500 |
2025 8 AUG £265,000 |
2022 9 MAY £219,000 |
2019 16 DEC £170,000 |
2016 9 DEC £189,000 |
2015 8 JUN £173,000 |
2015 16 JAN £150,000 |
2014 4 JUL £225,000 |
2013 9 DEC £160,000 |
2010 8 JUL £210,000 |
Licence: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.
Transport
Nearest bus stops to SA31 3SD
| Parc-y-ffordd (Llysonen Road) | Johnstown | 302m |
| Travellers Rest (Llysonen Road) | Travellers' Rest | 444m |
| Cilddewi Park (Parc Cilddewi) | Johnstown | 449m |
| Cillefwr Ind Estate (Alltycnap Road) | Johnstown | 598m |
| Cillefwr Ind Estate (Alltycnap Road) | Johnstown | 606m |
Nearest railway stations to SA31 3SD
| Carmarthen Station | 2.4km |
Broadband
Broadband access in SA31 3SD (2020 data)
| Percentage of properties with Next Generation Access | 100.0% |
| Percentage of properties with Superfast Broadband | 100.0% |
| Percentage of properties with Ultrafast Broadband | 100.0% |
| Percentage of properties with Full Fibre Broadband | 100.0% |
Superfast Broadband is between 30Mbps and 300Mbps
Ultrafast Broadband is > 300Mbps
Broadband speed in SA31 3SD (2019 data)
Download
| Median download speed | 14.0Mbps |
| Average download speed | 21.6Mbps |
| Maximum download speed | 80.00Mbps |
Upload
| Median upload speed | 4.7Mbps |
| Average upload speed | 4.8Mbps |
| Maximum upload speed | 20.00Mbps |
Broadband limitations in SA31 3SD (2020 data)
| Percentage of properties unable to receive 2Mbps | 0.0% |
| Percentage of properties unable to receive 5Mbps | 0.0% |
| Percentage of properties unable to receive 10Mbps | 0.0% |
| Percentage of properties unable to receive 30Mbps | 0.0% |
SA31 3SD gas and electricity consumption
Estimated total energy consumption in SA31 3SD by fuel type, 2015.
Gas
| Consumption (kWh) | 197,911 |
|---|---|
| Meter count | 16 |
| Mean (kWh/meter) | 12,369 |
| Median (kWh/meter) | 12,130 |
Electricity
| Consumption (kWh) | 38,780 |
|---|---|
| Meter count | 14 |
| Mean (kWh/meter) | 2,770 |
| Median (kWh/meter) | 2,907 |
- Consumption: The estimated total energy consumption, in kWh, across all meters in SA31 3SD, for 2015.
- Meter count: The total number of meters in SA31 3SD.
- Mean: The mean average consumption per meter, in kWh.
- Median: The median average consumption per meter, in kWh.
Source: Postcode level electricity estimates: 2015 (experimental)
Licence: Open Government Licence
Deprivation
19.9% of Welsh postcodes are less deprived than SA31 3SD:Food Standards Agency
Three nearest food hygiene ratings to SA31 3SD (metres)
➜ Get more ratings from the Food Standards Agency
Nearest post box to SA31 3SD
| Last Collection | |||
|---|---|---|---|
| Location | Mon-Fri | Sat | Distance |
| Johnstown Post Office | 17:15 | 11:30 | 1,005m |
| Maes Y Wenol | 17:00 | 11:15 | 1,656m |
| Tesco | 17:45 | 11:45 | 1,665m |
SA31 3SD ITL and SA31 3SD LAU
The below table lists the International Territorial Level (ITL) codes (formerly Nomenclature of Territorial Units for Statistics (NUTS) codes) and Local Administrative Units (LAU) codes for SA31 3SD:
| ITL 1 Code | Name |
|---|---|
| TLL | Wales |
| ITL 2 Code | Name |
| TLL1 | West Wales and The Valleys |
| ITL 3 Code | Name |
| TLL14 | South West Wales |
| LAU 1 Code | Name |
| W06000010 | Carmarthenshire |
SA31 3SD census areas
The below table lists the Census Output Area (OA), Lower Layer Super Output Area (LSOA), and Middle Layer Super Output Area (MSOA) for SA31 3SD:
| Code | Name | |
|---|---|---|
| OA | W00003459 | |
| LSOA | W01000644 | Carmarthenshire 006B |
| MSOA | W02000147 | Carmarthenshire 006 |
Nearest postcodes to SA31 3SD
| SA31 3SB | Allt Ioan | 67m |
| SA31 3SE | Parc Yr Odyn | 71m |
| SA31 3HD | Parc Y Ffordd | 211m |
| SA31 3BR | Maes Pedr | 270m |
| SA31 3BW | Maes Pedr | 331m |
| SA31 3HN | Old St Clears Road | 440m |
| SA31 3RB | Cillefwr Industrial Estate | 475m |
| SA31 3RJ | Manor Crescent | 545m |
| SA31 3HP | Cilddewi Park | 562m |
| SA31 3RL | Manor Way | 587m |
- Contains OS data © Crown copyright and database right (2026)
- Contains Royal Mail data © Royal Mail copyright and Database right (2026)
- Contains National Statistics data © Crown copyright and database right (2026)
- Data produced by Land Registry © Crown copyright (2026)
- Contains Environment Agency data licensed under the Open Government Licence v3.0
- Everything else © GetTheData Publishing Limited (2026)
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