SA31 3NJ maps, stats, and open data
SA31 3NJ lies on Lon Y Plas in Johnstown, Carmarthen. SA31 3NJ is located in the Carmarthen Town North and South 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 March 1988.
SA31 3NJ geodata
| Easting | 239983 |
| Northing | 218969 |
| Latitude | 51.846324 |
| Longitude | -4.324433 |
Where is SA31 3NJ?
| Street | Lon Y Plas |
| Locality | Johnstown |
| Town/City | Carmarthen |
| Country | Wales |
| Postcode District | SA31 |
SA31 3NJ Elevation
Elevation or altitude of SA31 3NJ as distance above sea level:
| Metres | Feet | |
|---|---|---|
| Elevation | 20m | 66ft |
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 North And South |
|---|---|
| Constituency | Carmarthen West And South Pembrokeshire |
House Prices
Sales of detached houses in SA31 3NJ
14, LON Y PLAS, JOHNSTOWN, CARMARTHEN, SA31 3NJ 2024 22 MAR £285,000 |
2024 12 JAN £315,000 |
2023 28 NOV £139,365 |
2022 5 AUG £265,000 |
16, LON Y PLAS, JOHNSTOWN, CARMARTHEN, SA31 3NJ 2021 6 MAY £172,000 |
2021 29 JAN £222,500 |
2019 7 OCT £199,000 |
2018 11 APR £195,000 |
34, LON Y PLAS, JOHNSTOWN, CARMARTHEN, SA31 3NJ 2017 25 JUL £170,000 |
2016 25 NOV £209,950 |
Licence: Contains HM Land Registry data © Crown copyright and database right 2025. This data is licensed under the Open Government Licence v3.0.
Transport
Nearest bus stops to SA31 3NJ
| Carmarthen Leisure Centre (Llansteffan Road) | Johnstown | 158m |
| Queen Elizabeth High School (Grounds) | Johnstown | 161m |
| Queen Elizabeth High School (Llansteffan Road) | Johnstown | 163m |
| Cambria School (Grounds) | Johnstown | 228m |
| Playing Fields (Llansteffan Road) | Johnstown | 263m |
Nearest railway stations to SA31 3NJ
| Carmarthen Station | 1.5km |
Broadband
Broadband access in SA31 3NJ (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 | 0.0% |
| Percentage of properties with Full Fibre Broadband | 0.0% |
Superfast Broadband is between 30Mbps and 300Mbps
Ultrafast Broadband is > 300Mbps
Broadband speed in SA31 3NJ (2019 data)
Download
| Median download speed | 40.0Mbps |
| Average download speed | 41.9Mbps |
| Maximum download speed | 80.00Mbps |
Upload
| Median upload speed | 10.0Mbps |
| Average upload speed | 10.1Mbps |
| Maximum upload speed | 20.00Mbps |
Broadband limitations in SA31 3NJ (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 3NJ gas and electricity consumption
Estimated total energy consumption in SA31 3NJ by fuel type, 2015.
Gas
| Consumption (kWh) | 482,610 |
|---|---|
| Meter count | 37 |
| Mean (kWh/meter) | 13,044 |
| Median (kWh/meter) | 13,145 |
Electricity
| Consumption (kWh) | 132,873 |
|---|---|
| Meter count | 34 |
| Mean (kWh/meter) | 3,908 |
| Median (kWh/meter) | 3,241 |
- Consumption: The estimated total energy consumption, in kWh, across all meters in SA31 3NJ, for 2015.
- Meter count: The total number of meters in SA31 3NJ.
- 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
23.4% of Welsh postcodes are less deprived than SA31 3NJ:Food Standards Agency
Three nearest food hygiene ratings to SA31 3NJ (metres)
➜ Get more ratings from the Food Standards Agency
Nearest post box to SA31 3NJ
| Last Collection | |||
|---|---|---|---|
| Location | Mon-Fri | Sat | Distance |
| Johnstown Post Office | 17:15 | 11:30 | 751m |
| Tesco | 17:45 | 11:45 | 962m |
| Safeway | 17:30 | 12:00 | 1,163m |
SA31 3NJ ITL and SA31 3NJ 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 3NJ:
| 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 3NJ 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 3NJ:
| Code | Name | |
|---|---|---|
| OA | W00003443 | |
| LSOA | W01000642 | Carmarthenshire 008B |
| MSOA | W02000149 | Carmarthenshire 008 |
Nearest postcodes to SA31 3NJ
| SA31 3PN | Plas Penwern | 67m |
| SA31 3PL | Plas Y Ddol | 70m |
| SA31 3NR | Llansteffan Road | 77m |
| SA31 3PW | Porth Y Plas | 101m |
| SA31 3PJ | Coed Y Plas | 103m |
| SA31 3PH | Plas Ystrad | 129m |
| SA31 3PU | Llys Ystrad | 135m |
| SA31 3NS | Plas Ioan | 146m |
| SA31 3NX | Heol Drindod | 164m |
| SA31 3NQ | Llansteffan Road | 182m |
- Contains OS data © Crown copyright and database right (2025)
- Contains Royal Mail data © Royal Mail copyright and Database right (2025)
- Contains National Statistics data © Crown copyright and database right (2025)
- Data produced by Land Registry © Crown copyright (2025)
- Contains Environment Agency data licensed under the Open Government Licence v3.0
- Everything else © GetTheData Publishing Limited (2025)
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