SA18 postcode district: Ammanford and around

SA18 is a postcode district in Wales, with 772 postcodes in use in 4 sectors. It has postcodes in Ammanford, Glanaman, Gwaun-Cae-Gurwen and 3 more places. It is split between 3 councils: Carmarthenshire (653 postcodes), Neath Port Talbot (103) and Swansea (16).

Postcodes in use: 772
Sectors: 4
Councils: 3 councils
Places: 6 places

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

Every postcode in SA18, by gigabit broadband

No home or business can get gigabit: 175
Some can get gigabit: 157
Every home and business can get gigabit: 430
Ofcom gives no figure: 10
Outline: where 5 or more postcodes without gigabit lie together

Of the 772 postcodes in SA18 that ONS places, 175 have no home or business that can get gigabit, 157 have some that can, 430 can all get it and 10 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 240 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 51.7978, longitude -3.9609. 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

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

SA18 1AJ SA18 1BP SA18 1DD SA18 1DE SA18 1DR SA18 1DS SA18 1DT SA18 1DU SA18 1DY SA18 1EY SA18 1HJ SA18 1JN

Where the postcodes without gigabit lie together

34 postcodes without gigabit, outlined on the map. SA18 3UY, is the one nearest the middle of them.
10 postcodes without gigabit, outlined on the map. SA18 2GX, is the one nearest the middle of them.
5 postcodes without gigabit, outlined on the map. SA18 3JL, is the one nearest the middle of them.

What broadband can you get in SA18?

Ofcom reports on 762 of the 772 postcodes in SA18. At 430 of them every home and business can get gigabit broadband, and at 10 some cannot get decent broadband (10 Mbit/s).

Postcodes where every home can get gigabit430 of 762

Postcodes where every home can get superfast622 of 762

Postcodes where some cannot get decent broadband10 of 762

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 SA18?

Homes in SA18 sold for a typical £192,500 in the 12 months to August 2026, across 327 sales, up 6.9% on the 12 months before, HM Land Registry's figures show.

£192,500 typical price, the 12 months to August 2026

12 months to August 2025: £180,000
12 months to August 2026: £192,500

▲ up 6.9% on the 12 months before

Detached£274,000 139 sales

Semi-detached£175,000 146 sales

Terraced£139,500 39 sales

Flat or maisonette 3 sales, too few to price

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