SA40 postcode area guide — Carmarthenshire
House prices, crime, broadband speeds, mobile signal, schools and demographics for the SA40 postcode district in Carmarthenshire — every official dataset on one page.
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Where is SA40?
Broadband & internet speeds in SA40
Strong coverage
Superfast (30Mb+)
73.6%
Ultrafast (300Mb+)
54.9%
Gigabit-capable
54.9%
Below USO (10Mb)
8.7%
Broadband availability in the SA40 postcode district (Carmarthenshire) is Strong — superfast is near-universal and gigabit is rolling out. Across the 107 postcodes Ofcom measures in SA40, superfast broadband (30 Mbit/s or faster) reaches 73.6% of premises and gigabit-capable lines are available to 54.9%.
Around 8.7% of premises in SA40 fall below the Universal Service Obligation (a minimum of 10 Mbit/s download and 1 Mbit/s upload), so the overwhelming majority of homes and businesses here can already order a decent fixed line. For a business that depends on its connection, the figures that matter most are gigabit and full-fibre availability — the symmetric, low-contention services we quote leased lines and FTTP against.
Sample postcodes in SA40
| Postcode | Superfast | Gigabit |
|---|---|---|
| SA40 9AA | 100% | 100% |
| SA40 9AB | 100% | 100% |
| SA40 9QA | 92.9% | 85.7% |
| SA40 9QB | 100% | 100% |
| SA40 9QD | 100% | 91.7% |
| SA40 9QE | 77.8% | 33.3% |
| SA40 9QG | 87.5% | 87.5% |
| SA40 9QJ | 92.3% | 92.3% |
| SA40 9QL | 75% | 75% |
| SA40 9QN | 55.6% | 55.6% |
Run a speed test to see what you're actually getting, or check your exact postcode.
Mobile signal around Carmarthenshire
Ofcom's coverage model for the wider Carmarthenshire district (95,165 premises):
4G indoors — all networks
80.3%
4G outdoors — all networks
95.7%
5G outdoors — all networks
—
Voice indoors — all networks
83%
Signal varies street by street — use the mobile coverage checker to compare EE, O2, Three and Vodafone at an exact postcode.
Crime in SA40
Police recorded 4 incidents within about a mile of the centre of SA40 in May 2026 (latest published street-level data). The breakdown:
| Category | Incidents | Share |
|---|---|---|
| Anti-social behaviour | 1 | 25.0% |
| Other theft | 1 | 25.0% |
| Weapons possession | 1 | 25.0% |
| Violence & sexual offences | 1 | 25.0% |
Raw counts favour busy town centres — a high street with shops and nightlife records more incidents than a residential cul-de-sac. Source: police.uk open data (point sample around the district centroid).
House prices in SA40
Based on 33 sales registered with HM Land Registry in the last 12 months, the median sold price in SA40 is £234,000, up 17.0% on the previous year (£200,000).
Detached
£280,000
17 sales
Semi-detached
£180,000
6 sales
Terraced
£180,000
6 sales
Latest recorded sales in SA40
| Date | Price | Type | Street | Postcode |
|---|---|---|---|---|
| 5 May 2026 | £10,000 | Other | SA40 9UP | |
| 16 Apr 2026 | £300,000 | Detached | SA40 9SX | |
| 1 Apr 2026 | £315,000 | Detached | SA40 9XB | |
| 24 Mar 2026 | £188,000 | Terraced | SA40 9RL | |
| 24 Mar 2026 | £287,000 | Detached | SA40 9SA | |
| 23 Mar 2026 | £195,000 | Detached | SA40 9RN | |
| 23 Mar 2026 | £285,000 | Detached | SA40 9TY | |
| 23 Mar 2026 | £270,000 | Detached | SA40 9SX | |
| 22 Jan 2026 | £170,000 | Semi-detached | SA40 9QA | |
| 15 Jan 2026 | £217,000 | Semi-detached | SA40 9SP |
Contains HM Land Registry data © Crown copyright and database right 2026, licensed under the Open Government Licence v3.0.
Who lives here? Carmarthenshire demographics
Census 2021 figures for the wider Carmarthenshire district (187,897 residents, 81,759 households):
| Age profile | |
|---|---|
| Under 15 | 17.3% |
| 15–29 | 19.9% |
| 30–44 | 16.9% |
| 45–64 | 21.8% |
| 65+ | 24.2% |
| Housing tenure | |
|---|---|
| Owner-occupied | 70.4% |
| Private rented | 15% |
| Social rented | 3.9% |
Source: ONS Census 2021 (district level — the finest openly licensed cut we republish). © Crown copyright, OGL v3.0.
Schools in and around SA40
| School | Phase | Ages | Pupils | Postcode |
|---|---|---|---|---|
| Llanybydder School | Not applicable | — | — | SA40 9RP |
| Ysgol Dyffryn Cledlyn VC CiW | Not applicable | — | — | SA40 9SX |
| Ysgol Gynradd Wirfoddol Llanllwni | Not applicable | — | — | SA39 9DX |
| Ysgol Carreg Hirfaen | Not applicable | — | — | SA48 8EP |
Source: DfE Get Information about Schools (England & Wales). Check Ofsted report cards for inspection detail — headline one-word grades were retired in 2024.
Food hygiene ratings in SA40
32 rated food businesses operate in SA40. 24 hold the top rating of 5, 3 are rated 4, and none are currently rated 2 or below.
Among the 5-rated: ALBION ARMS, ALLT-Y-MYNYDD NURSING HOME, Annedd Care Home, BELLE VUE INN, Bocs Bwyd.
Source: Food Standards Agency, food hygiene ratings (FHRS) open data.
Energy performance (EPC) in SA40
From a sample of 199 Energy Performance Certificates across 12 SA40 postcodes, the most common rating is band E (average band E). 20% of sampled homes are rated C or better.
Band A
1%
Band B
4%
Band C
16%
Band D
28%
Band E
30%
Band F
16%
Band G
7%
Source: MHCLG Energy Performance of Buildings Data (England & Wales), sampled at postcode level and refreshed monthly. Individual certificates are on each postcode’s page.
Phone area codes for Carmarthenshire
Landlines around SA40 typically use:
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What's it like living in SA40?
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Moving to SA40? Sort your connectivity first
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Postcodes in SA40
Neighbouring districts
All Swansea (SA) postcode districts ›
Frequently asked questions
Where is the SA40 postcode?
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How energy efficient are homes in SA40?
Sources: HM Land Registry Price Paid Data, police.uk street-level crime, Ofcom Connected Nations, ONS Census 2021, DfE Get Information about Schools, Food Standards Agency FHRS — all © Crown copyright, licensed under the Open Government Licence v3.0. Figures are area aggregates; individual addresses vary. Energy performance (EPC) data will be added when our Open Data Communities registration is approved.