EPC Merthyr Tydfil

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EPC Merthyr Tydfil – Energy Performance Certificates

If you’re selling or letting a property in Merthyr Tydfil, you’ll need a valid Energy Performance Certificate (EPC). An EPC rates how energy-efficient a property is and is a legal requirement before it can be marketed for sale or rent.

If you’re unsure what an EPC involves or when it’s required, see our guide: What is an EPC?

Local EPCs for Merthyr Tydfil properties

Merthyr Tydfil has some of the most distinctive housing stock in South Wales, and EPCs are commonly required for properties in areas such as:

  • Gurnos – largely post-war housing where insulation levels and heating systems can vary widely

  • Penydarren and Dowlais – older terraced homes, often with solid walls and traditional construction

  • Central Merthyr and hillside streets – Victorian and early-20th-century terraces built during the town’s industrial expansion

These property types can have very different EPC outcomes, which is why a locally carried-out assessment is important.

What happens during an EPC assessment?

During an EPC assessment in Merthyr Tydfil, the assessor will typically review:

  • Property size, layout, and age

  • Wall construction and insulation (where visible)

  • Loft or roof insulation (if accessible)

  • Heating system, controls, and hot water

  • Windows, glazing, and fixed lighting

The assessment is non-invasive and usually takes 30–60 minutes, depending on the size and age of the property.

How quickly can I get an EPC in Merthyr Tydfil?

In most cases:

  • Appointments are available within a few days

  • The on-site visit is completed in under an hour

  • The EPC is lodged on the national register within 24 hours of the assessment

This allows sellers and landlords to move forward quickly with marketing or compliance.

EPCs for landlords and sellers in Merthyr Tydfil

You’ll need an EPC if you are:

  • Selling a house or flat

  • Letting a residential property

  • Advertising a property through an estate or letting agent

Landlords must also ensure their property meets Minimum Energy Efficiency Standards (MEES). More details are available here: EPC requirements for landlords

Book an EPC in Merthyr Tydfil

To arrange an EPC in Merthyr Tydfil, contact the assessor listed on this page to check availability, confirm pricing, and book an appointment.

If you’re looking for an EPC elsewhere in the area, you can also visit:

If a certificate was lodged in the last ten years it may still be valid: check your EPC rating before booking a new one.

EPC data for Merthyr Tydfil

Figures below are for Caerphilly, the local authority covering Merthyr Tydfil, from the Energy Performance of Buildings Register to 2026 Q2.

2,469EPCs reach their 10-year expiry in the next 12 months
Band CThe most common rating, on 51% of certificates
45%Rated D or below, against 46% nationally
£943Average estimated heating cost a year

That expiry count is certificates lodged ten years ago and now coming up for renewal. Some of those homes have already been re-certified since, which authority-level data cannot show, so treat it as the ceiling rather than a to-do list.

How Caerphilly rates

Share of the 18,409 certificates lodged in the five years to 2026 Q2. This is the certificates lodged, not a survey of every home in the area.

What gets assessed around here

78% of the certificates lodged here are for houses. The average floor area is 83.8m², about the England and Wales average. Estimated heating costs average £943 a year, in line with the national figure. 33% of certificates were lodged for rented homes.

Radon in Merthyr Tydfil

Merthyr Tydfil sits in a radon Affected Area. The UKHSA and British Geological Survey put the 1km square covering the town centre in a band where between 3 and 5 in 100 homes are estimated to be at or above the radon action level of 200 becquerels per cubic metre. Radon is not measured during an EPC survey and does not affect the rating, but if you are buying, selling or improving a home here it is worth a test kit, and worth knowing before you seal a property up: draught-proofing and insulation work can raise indoor radon if ventilation is reduced. The atlas is indicative and works to a 1km grid, so it describes the area rather than any one property.

What an EPC costs in Merthyr Tydfil

An EPC around here generally costs between £55 and £150, though it depends on the property: floor area, whether there are rooms in the roof, extensions, and how far the assessor travels all move the price. We are not a panel and we do not set anybody's fees, so the figure you are quoted comes from the assessor doing the work. Contact one above for a price on your property.

Sources: MHCLG Energy Performance of Buildings Certificates live tables, 2026 Q2; UKHSA and British Geological Survey Indicative Atlas of Radon. Prepared 2026-09-11.

Elmhurst accredited EPC assessor

What to expect when a Domestic Energy Assessor comes to your property

Every Domestic Energy Assessor / DEA will have their own order and format of carrying out the EPC depending on the software that they use and their personal preference to efficiency.

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Frequently Asked Questions

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