Will your Cardiff rental pass EPC C by 2030?
14,315 of 29,459 privately rented homes in Cardiff are below EPC C, 49% of the local rental market. They must be upgraded by 1 October 2030.
How Cardiff compares
Below average
Cardiff is in better shape than most of England and Wales.
49% of rented homes here are below EPC C, against 53% across England and Wales. That ranks Cardiff 252 of 318 councils by the share needing work.
Every band in Cardiff
Of 29,459 privately rented homes with a current certificate.
How many can actually reach C?
13,284 of the 14,315 sub-C rentals in Cardiff, 93% 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 | 29,459 |
|---|---|
| Socially rented | 20,235 |
| Owner occupied | 52,543 |
| Median floor area | 79 m² |
Postcode districts in Cardiff
Districts that sit mostly or wholly inside Cardiff.