# SA18

Postcode district covering Ammanford, in Carmarthenshire and Neath Port Talbot.

SA18 is a postcode district covering Ammanford, in Carmarthenshire and Neath Port Talbot. Median sale price £182,750 in 2025.

Postcode district. Code SA18. In: [Postcodes](https://openindex.co.uk/postcode) › [SA](https://openindex.co.uk/postcode/sa)

Approximate outline worked out by Open Index from the ONS Postcode Directory: each census output area belongs to the district that holds most of its postcodes. People, homes, recorded crime and broadband add up those output areas. House sales count every sale with an SA18 postcode. [How census figures are added up](https://openindex.co.uk/sources/population)

## Key figures

- **Median sale price: £182,750** (2025). The median price paid for a home in SA18 was £182,750 in 2025. 270th cheapest of 2,235. Source: Worked out by Open Index from HM Land Registry Price Paid Data. Published 28 September 2026. https://openindex.co.uk/postcode/sa18#f-house-sales-median-price
- **Population: 29,980** (2021). SA18 had 29,980 usual residents at the census (ONS Census 2021). Joint 927th most populated of 2,756. Source: Census 2021, England and Wales and Scotland's Census 2022 and Census 2021, Northern Ireland, 2021. Published 21 July 2026. https://openindex.co.uk/postcode/sa18#f-population
- **People in radon Affected Area squares: 29%** (2022). About 29% of people in SA18 live in a 1 km square that the radon atlas marks as a radon Affected Area. UK 44%. Source: Worked out by Open Index from the UKHSA and BGS radon atlas and census output areas. Published 1 December 2022. https://openindex.co.uk/postcode/sa18#f-radon-affected-share
- **Gigabit broadband coverage: 83.4%** (January 2026). In SA18, 83.4% of homes and businesses could get gigabit-capable broadband in January 2026 (Ofcom). UK 87.8%. Source: Connected Nations (Ofcom), January 2026. Published 13 May 2026. https://openindex.co.uk/postcode/sa18#f-gigabit-coverage

## On the map

- [Radon Affected Area by postcode district](https://openindex.co.uk/map/radon-affected-areas?place=SA18) (Worked out by Open Index · 2022): About 29% of people in SA18 live in a 1 km square that the radon atlas marks as a radon Affected Area.
- [Sales per year by postcode district](https://openindex.co.uk/map/house-sales-per-year?place=SA18) (Worked out by Open Index · 2025): 368 homes were sold in SA18 in 2025.
- [Crime and ASB by postcode district](https://openindex.co.uk/map/recorded-crime?place=SA18) (Police recorded crime and outcomes (data.police.uk) · August 2026): Crime and anti-social behaviour for SA18.
- [Population by postcode district](https://openindex.co.uk/map/population?place=SA18) (Census 2021, England and Wales): SA18 had 29,980 usual residents at the census.

## How SA18 compares

Each postcode district against every other postcode district the measure covers.

| Measure | SA18 | Rank | Compared with |
| --- | --- | --- | --- |
| Median sale price | £182,750 | 13th cheapest | 49 postcode districts, SA · 2025 |
| Population | 29,980 | 11th most populated | 52 postcode districts, SA · 2021 |
| People in radon Affected Area squares | 29% | 2nd fewest people in radon Affected Areas | 52 postcode districts, SA · 2022 |
| Gigabit broadband coverage | 83.4% | 19th highest | 52 postcode districts, SA · Jan 2026 |

## Is SA18 safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in SA18 at a rate of 74.6 per 1,000 people.
That compares with 86.6 per 1,000 people across the SA postcode area.
In August 2026 alone, 208 cases of crime and anti-social behaviour were recorded in SA18.
In the 12 months to August 2026, the most common types were violence and sexual offences (1,140), other crime (412) and anti-social behaviour (243).
A year earlier, the recorded crime rate in SA18 was 76.0 per 1,000 people.
Worked out by Open Index from police.uk crime records and ONS and NISRA population estimates.
Rates are per resident, so places that many people work in or visit, such as Westminster, the City of London and other city centres, have far higher rates than their residents alone would suggest.

## Deprivation in SA18, neighbourhood by neighbourhood

- Deprivation is ranked by neighbourhood, so SA18 has no single figure. Of its 17 neighbourhoods with a rank:
- Decile 2: 2 neighbourhoods
- Decile 3: 6 neighbourhoods
- Decile 4: 3 neighbourhoods
- Decile 5: 2 neighbourhoods
- Decile 7: 2 neighbourhoods
- Decile 8: 2 neighbourhoods

Source: Welsh Index of Multiple Deprivation 2025. Decile 1 is the most deprived tenth of neighbourhoods in Wales.

## Neighbourhoods in SA18

| Area | People (census) | Recorded crime per 1,000 | Deprivation decile | Gigabit broadband |
| --- | --- | --- | --- | --- |
| [Carmarthenshire 010A](https://openindex.co.uk/carmarthenshire/neighbourhood/w01000656) | 2,049 | 116.2 per 1,000 | 4 | 88.6% |
| [Carmarthenshire 010B](https://openindex.co.uk/carmarthenshire/neighbourhood/w01000657) | 1,159 | 73.3 per 1,000 | 3 | 93.4% |
| [Carmarthenshire 010C](https://openindex.co.uk/carmarthenshire/neighbourhood/w01000658) | 1,347 | 60.2 per 1,000 | 4 | 86.5% |
| [Carmarthenshire 010D](https://openindex.co.uk/carmarthenshire/neighbourhood/w01000718) | 1,403 | 79.2 per 1,000 | 3 | 99.2% |
| [Carmarthenshire 011A](https://openindex.co.uk/carmarthenshire/neighbourhood/w01000680) | 2,303 | 36.3 per 1,000 | 8 | 76.0% |
| [Carmarthenshire 011B](https://openindex.co.uk/carmarthenshire/neighbourhood/w01000681) | 2,087 | 57.4 per 1,000 | 3 | 15.3% |
| [Carmarthenshire 011C](https://openindex.co.uk/carmarthenshire/neighbourhood/w01000724) | 1,957 | 66.3 per 1,000 | 5 | 81.1% |
| [Carmarthenshire 011D](https://openindex.co.uk/carmarthenshire/neighbourhood/w01000725) | 2,306 | 56.0 per 1,000 | 5 | 87.9% |
| [Carmarthenshire 013A](https://openindex.co.uk/carmarthenshire/neighbourhood/w01000625) | 1,128 | 131.2 per 1,000 | 2 | 90.5% |
| [Carmarthenshire 013B](https://openindex.co.uk/carmarthenshire/neighbourhood/w01000626) | 1,619 | 235.0 per 1,000 | 3 | 83.1% |
| [Carmarthenshire 013C](https://openindex.co.uk/carmarthenshire/neighbourhood/w01000627) | 2,398 | 66.5 per 1,000 | 7 | 78.2% |
| [Carmarthenshire 013D](https://openindex.co.uk/carmarthenshire/neighbourhood/w01000714) | 1,416 | 71.6 per 1,000 | 3 | 94.5% |
| [Carmarthenshire 013E](https://openindex.co.uk/carmarthenshire/neighbourhood/w01000715) | 1,276 | 50.8 per 1,000 | 8 | 63.9% |
| [Carmarthenshire 017C](https://openindex.co.uk/carmarthenshire/neighbourhood/w01000731) | 2,412 | 45.3 per 1,000 | 7 | 91.7% |
| [Neath Port Talbot 020C](https://openindex.co.uk/neath-port-talbot/neighbourhood/w01000928) | 1,597 | 53.5 per 1,000 | 3 | 96.7% |
| [Neath Port Talbot 020D](https://openindex.co.uk/neath-port-talbot/neighbourhood/w01000929) | 1,260 | 67.4 per 1,000 | 2 | 93.9% |
| [Neath Port Talbot 020E](https://openindex.co.uk/neath-port-talbot/neighbourhood/w01000931) | 1,361 | 66.9 per 1,000 | 4 | 97.5% |

## Your MP

- [Caerfyrddin](https://openindex.co.uk/constituency/caerfyrddin): Ann Davies (Plaid Cymru), MP since July 2024. 78% of the people here.
- [Brecon, Radnor and Cwm Tawe](https://openindex.co.uk/constituency/brecon-radnor-and-cwm-tawe): David Chadwick (Liberal Democrat), MP since July 2024. 13% of the people here.
- [Llanelli](https://openindex.co.uk/constituency/llanelli): Dame Nia Griffith (Labour), MP since July 2024. 6.2% of the people here.
- [Gower](https://openindex.co.uk/constituency/gower): Tonia Antoniazzi (Labour), MP since July 2024. 2.1% of the people here.

As of 18 October 2026. Contains Parliamentary information licensed under the Open Parliament Licence v3.0. Source: UK Parliament, Members API.

## Middle areas in SA18

[Ammanford & Betws](https://openindex.co.uk/carmarthenshire/ammanford-and-betws), [Brynaman, Y Garnant & Glanaman](https://openindex.co.uk/carmarthenshire/brynaman-y-garnant-and-glanaman), [Llandybie & Saron](https://openindex.co.uk/carmarthenshire/llandybie-and-saron)

## Postcode sectors in SA18

[SA18 1 (227 postcodes)](https://openindex.co.uk/postcode/sa18-1), [SA18 2 (275 postcodes)](https://openindex.co.uk/postcode/sa18-2), [SA18 3 (262 postcodes)](https://openindex.co.uk/postcode/sa18-3), [SA18 9 (8 postcodes)](https://openindex.co.uk/postcode/sa18-9)

## Councils SA18 covers

[Carmarthenshire](https://openindex.co.uk/carmarthenshire), [Neath Port Talbot](https://openindex.co.uk/neath-port-talbot)

## Towns in SA18

[Ammanford](https://openindex.co.uk/town/ammanford)

## Postcode districts next to SA18

[SA4](https://openindex.co.uk/postcode/sa4), [SA5](https://openindex.co.uk/postcode/sa5), [SA6](https://openindex.co.uk/postcode/sa6), [SA8](https://openindex.co.uk/postcode/sa8), [SA9](https://openindex.co.uk/postcode/sa9), [SA14](https://openindex.co.uk/postcode/sa14), [SA19](https://openindex.co.uk/postcode/sa19), [SA32](https://openindex.co.uk/postcode/sa32)

## Nearest rail stations

[Ammanford (1.2 km from the middle)](https://openindex.co.uk/map/rail-stations?around=-3.9967,51.7960), [Pantyffynnon (2.2 km from the middle)](https://openindex.co.uk/map/rail-stations?around=-3.9974,51.7789), [Llandybie (3.3 km from the middle)](https://openindex.co.uk/map/rail-stations?around=-4.0037,51.8210)

## More in the SA postcode area

[All SA postcode districts](https://openindex.co.uk/postcode/sa), [Every UK postcode area](https://openindex.co.uk/postcode)

## SA18 in brief

SA18 is a postcode district covering Ammanford, in Carmarthenshire and Neath Port Talbot.
About 30,595 people lived in SA18 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £182,750 in 2025 across 368 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 74.6 per 1,000 people in the 12 months to August 2026 (police.uk).
The median price paid for a home in SA18 was £182,750 in 2025.
SA18 had 29,980 usual residents at the census.
About 29% of people in SA18 live in a 1 km square that the radon atlas marks as a radon Affected Area.
In SA18, 83.4% of homes and businesses could get gigabit-capable broadband in January 2026.

## About

- Type: Postcode district
- Code: SA18
- Postcode area: [SA](https://openindex.co.uk/postcode/sa)
- Constituency: [Caerfyrddin †](https://openindex.co.uk/constituency/caerfyrddin)
- Council: [Carmarthenshire †](https://openindex.co.uk/carmarthenshire)
- Area: 129 km²
- People, mid-2024: 30,595*
- Neighbourhoods: 17
- Output areas: 95

* People: worked out by Open Index from neighbourhood estimates, shared out by where people lived at the census (by area in Northern Ireland). This area's edges do not follow neighbourhood edges, so the figure is close but not exact.
† Best fit: the constituency, council and nation this postcode district mostly lies in. Its edges do not follow theirs.

## Next door

[SA19](https://openindex.co.uk/postcode/sa19), [SA14](https://openindex.co.uk/postcode/sa14), [SA9](https://openindex.co.uk/postcode/sa9), [SA4](https://openindex.co.uk/postcode/sa4), [SA8](https://openindex.co.uk/postcode/sa8), [SA5](https://openindex.co.uk/postcode/sa5)

## Latest updates for SA18

- August 2026 house prices published: HM Land Registry and partners · Oct 2026.
- September 2026 rent published: ONS private rents · Oct 2026.
- Dental practices updated: NHS England · Oct 2026.
- Schools updated: Ofsted · Oct 2026.

The same figures as JSON: https://openindex.co.uk/v1/places/SA18

## How to cite

Source: Open Index, openindex.co.uk. Link to this page, https://openindex.co.uk/postcode/sa18, or to one figure with its anchor, https://openindex.co.uk/postcode/sa18#f-house-sales-median-price.

Open Index's own text and the figures it works out are licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source data keeps its publishers' licences, named with each figure. Give each figure's period and source with it.

Snapshot 2026.10.9. The HTML page: https://openindex.co.uk/postcode/sa18