Will your Carmarthenshire rental pass EPC C by 2030?
5,873 of 8,593 privately rented homes in Carmarthenshire are below EPC C, 68% of the local rental market. They must be upgraded by 1 October 2030.
How Carmarthenshire compares
Well above average
A bigger share of Carmarthenshire's rented homes fall short than in most of England and Wales.
68% of rented homes here are below EPC C, against 53% across England and Wales. That ranks Carmarthenshire 16 of 318 councils by the share needing work.
Every band in Carmarthenshire
Of 8,593 privately rented homes with a current certificate.
How many can actually reach C?
5,504 of the 5,873 sub-C rentals in Carmarthenshire, 94% of them, already have a potential rating of C or better on their current certificate. That is the assessor's own estimate of what the property would reach if the recommended measures were installed.
Landlords are required to spend up to £10,000 per property. Above that, an exemption may apply.
The transitional rule
An EPC rated C or higher on the existing Energy Efficiency Rating, issued before 1 October 2029, counts as compliant until that certificate expires.
Source: Transitional rule. Verified 21 September 2026.
Local housing stock
| Privately rented | 8,593 |
|---|---|
| Socially rented | 8,771 |
| Owner occupied | 32,936 |
| Median floor area | 90 m² |
Postcode districts in Carmarthenshire
Districts that sit mostly or wholly inside Carmarthenshire.
| District | Post town | Rented | Below C | Share |
|---|---|---|---|---|
| SA15 | Llanelli | 2,318 | 1,536 | 66% |
| SA4 | Swansea | 1,686 | 926 | 55% |
| SA31 | Carmarthen | 1,298 | 799 | 62% |
| SA18 | Ammanford | 1,025 | 694 | 68% |
| SA14 | Llanelli | 1,045 | 683 | 65% |
| SA48 | Lampeter | 648 | 484 | 75% |
| SA33 | Carmarthen | 570 | 461 | 81% |
| SA44 | Llandysul | 511 | 445 | 87% |
| SA19 | Llandeilo | 398 | 305 | 77% |
| SA38 | Newcastle Emlyn | 315 | 241 | 77% |
| SA9 | Swansea | 396 | 237 | 60% |
| SA16 | Burry Port | 376 | 235 | 63% |
| SA17 | Kidwelly | 331 | 224 | 68% |
| SA32 | Carmarthen | 257 | 220 | 86% |
| SA40 | Llanybydder | 170 | 157 | 92% |
| SA34 | Whitland | 223 | 148 | 66% |
| SA20 | Llandovery | 164 | 131 | 80% |
| SA66 | Clynderwen | 104 | 94 | 90% |
| SA39 | Pencader | 96 | 82 | 85% |