Cardiff · Wales
EPC (energy performance certificate) in Cardiff
What you need: A valid energy performance certificate from an accredited assessor before you let, with a copy for the contract-holder.
How often: When you let: give contract-holders a valid EPC.
Free to use · No sign-up · Always check their registration before you book · Search another town or postcode
Request an EPC in Cardiff
No EPC assessor listed for Cardiff yet. Tell us what you need and we'll find you a registered EPC assessor, free.
Opens your email app with a short template (address, property type, date needed), addressed to [email protected].
Or check an EPC assessor yourself
- GOV.UK: get a new energy certificate: the official search for accredited assessors in England, Wales and Northern Ireland
- GOV.UK: find an energy certificate: look up a home's current EPC and the assessor who lodged it
EPCs must be done by an accredited domestic energy assessor; the register shows who lodged each one. These are public registers; we're not part of them and they don't endorse us.
Local tips for Cardiff
Terrace and semi country
Most homes here are terraces or semis. Insulation and heating upgrades are the usual way to nudge a rating up, so have receipts ready.
Where's this from?
ONS Census 2021, Cardiff: 29.6% terraced, 29.7% semi-detachedBusy rental market: book early
Lots of people rent in Cardiff, so if you're letting, book a few weeks before a tenancy starts or renews. No last-minute panic.
Where's this from?
ONS Census 2021, Cardiff: 24.3% private rented vs 17.0% Wales🤓 Did you know? (Cardiff edition)
Cardiff had a population of 381,516 in 2025 and forms a principal area officially known as the City and County of Cardiff.
The city is the eleventh largest in the United Kingdom.
Lots of purpose-built flats round here. Check whether the job covers just your flat or the shared areas too.
Source: ONS Census 2021 (TS044): 20.2% purpose-built flats vs 9.4% Wales
Landlord rules in plain English (Wales)
- When you let: give contract-holders a valid EPC.
- Minimum E: generally applies to private lets.
The fuller version
Since 1 December 2022 most private tenancies in Wales are 'occupation contracts' under the Renting Homes (Wales) Act 2016.
Private landlords and agents in Wales must register (and, if managing, be licensed) with Rent Smart Wales.
An EPC must be provided to contract-holders, and the England & Wales MEES minimum rating of E generally applies to private lets.
Rules differ in England, Wales, Scotland and Northern Ireland, and they do change. This is a friendly summary, not legal advice. Double-check on GOV.WALES.
Your corner of Cardiff
Also covering: CF3, CF11, CF15, CF23, CF24, CF30, CF91, CF95, CF99
Nearby towns
Other checks in Cardiff
Free landlord resources
Letting in Cardiff? Our free, sourced guides for Wales:
Frequently asked questions
Do landlords in Cardiff need an EPC?
Yes. You need a valid EPC to let a home in Wales, and it usually lasts 10 years. (Summary only; check the official guidance.)
Is renting common in Cardiff?
Yes, about 24% of households rented privately at the 2021 Census (ONS TS054), so plenty of local landlords need these checks.
Which postcode districts are in Cardiff?
12 active postcode districts use the Cardiff post town, from CF3 to CF99 (ONS Postcode Directory via Doogal). District pages on this site: CF10, CF14, CF5.
Nobody covers my part of Cardiff yet. Where else can I look?
The nearest other towns we list are Bristol (~25 miles), Swansea (~34 miles), Exeter (~55 miles), measured straight-line between OS Open Names centres. An EPC assessor based there may travel, so ask.
What's the housing mix in Cardiff?
14.1% detached, 29.7% semi-detached, 29.6% terraced and 20.2% purpose-built flats, plus 5.0% in converted or shared houses (Census 2021, ONS TS044).
📊 The numbers behind this page
- Households privately renting (Cardiff local authority)
- 24.3% Source: ONS Census 2021 (TS054)
- Detached homes (Cardiff local authority)
- 14.1% Source: ONS Census 2021 (TS044)
- Semi-detached homes (Cardiff local authority)
- 29.7% Source: ONS Census 2021 (TS044)
- Terraced homes (Cardiff local authority)
- 29.6% Source: ONS Census 2021 (TS044)
- Households in purpose-built flats (Cardiff local authority)
- 20.2% Source: ONS Census 2021 (TS044)
- Households with electric-only heating (Cardiff local authority)
- 10.4% Source: ONS Census 2021 (TS046)
- Population (GeoNames gazetteer)
- 372,089 Source: GeoNames, CC BY 4.0
- Active postcode districts with this post town
- 12 Source: Doogal / ONS Postcode Directory
- Local authority
- Cardiff Source: postcodes.io (ONSPD)
- Region / nation
- Wales Source: OS Open Names via postcodes.io
- Nearest listed town
- Bristol (~25 miles) Source: Calculated from OS Open Names coordinates
Made with open data. See where it all comes from. Updated 23 October 2026.