SA31 postcode district: Carmarthen and around

SA31 is a postcode district in Wales, with 580 postcodes in use in 4 sectors. It has postcodes in Carmarthen. Its council is Carmarthenshire.

Postcodes in use: 580
Sectors: 4
Council: Carmarthenshire
Places: Carmarthen

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. See all our data sources

Every postcode in SA31, by gigabit broadband

No home or business can get gigabit: 69
Some can get gigabit: 177
Every home and business can get gigabit: 308
Ofcom gives no figure: 26
Outline: where 5 or more postcodes without gigabit lie together

Of the 580 postcodes in SA31 that ONS places, 69 have no home or business that can get gigabit, 177 have some that can, 308 can all get it and 26 have no Ofcom figure.

Each mark is a postcode's centre point as ONS gives it, not a building. Press one to see its postcode and open its page. A dashed outline shows where 5 or more lie within 150 metres of each other. It is not a boundary, and no boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode.

The middle of its postcodes: latitude 51.8569, longitude -4.3084. Open this area on OpenStreetMap

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026, the centre point of each postcode; gigabit: Ofcom, Connected Nations, Spring 2026; roads, rivers and built-up areas: Contains OS data © Crown copyright and database right 2026. Drawn by us. Street map: Ordnance Survey, OS Open Zoomstack, Open Government Licence v3.0, drawn with MapLibre. How we use them

Postcodes without gigabit

69 postcodes here have no gigabit. These are the 12 first in postcode order.

SA31 1AD SA31 1AG SA31 1AH SA31 1AN SA31 1BA SA31 1BW SA31 1EG SA31 1EH SA31 1JT SA31 1LE SA31 1LG SA31 1LW

Where the postcodes without gigabit lie together

10 postcodes without gigabit, outlined on the map. SA31 1JT, is the one nearest the middle of them.
8 postcodes without gigabit, outlined on the map. SA31 2LQ, is the one nearest the middle of them.
5 postcodes without gigabit, outlined on the map. SA31 2HD, is the one nearest the middle of them.

What broadband can you get in SA31?

Ofcom reports on 554 of the 580 postcodes in SA31. At 308 of them every home and business can get gigabit broadband, and at 2 some cannot get decent broadband (10 Mbit/s).

Postcodes where every home can get gigabit308 of 554

Postcodes where every home can get superfast481 of 554

Postcodes where some cannot get decent broadband2 of 554

Ofcom gives each postcode's share of homes and businesses, not how many there are, so these count postcodes. Each postcode page has its own figures. A provider's checker answers for one address.

Check one address on Ofcom's checker

Source: Ofcom, Connected Nations, Spring 2026, data for January 2026, Open Government Licence v3.0. How we use it

What do homes sell for in SA31?

Homes in SA31 sold for a typical £216,000 in the 12 months to August 2026, across 188 sales, down 3.8% on the 12 months before, HM Land Registry's figures show.

£216,000 typical price, the 12 months to August 2026

12 months to August 2025: £224,500
12 months to August 2026: £216,000

▼ down 3.8% on the 12 months before

Detached£296,500 65 sales

Semi-detached£220,000 56 sales

Terraced£150,000 60 sales

Flat or maisonette£165,000 7 sales

Standard sales of homes at market value. A typical price is the median, the middle sale. Sales take weeks to be registered, so the last month or two are incomplete. Each postcode page gives the figure for its own postcode sector.

Source: HM Land Registry Price Paid Data, files dated 28 September 2026. Contains HM Land Registry data © Crown copyright and database right 2021. This data is licensed under the Open Government Licence v3.0. How we use it