Treharris · CF46

EPC in CF46 (Treharris)? We'll point you the right way.

Covering Treharris, Quakers Yard, Bedlinog, Nelson, including Bedlinog and Trelewis, Plymouth, St Cattwg. Find accredited domestic energy assessors nearby.

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Request an EPC in CF46 (Treharris)

How to check an EPC assessor is registered: see the Treharris page.

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CF46 (Treharris) in a nutshell

CF46 covers Treharris, Quakers Yard, Bedlinog, Nelson, in Caerphilly and Merthyr Tydfil. Give your full postcode when you ask for quotes, so the pro can confirm they cover your street.

Local tips for CF46

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Two councils in one district

CF46 is split between Caerphilly and Merthyr Tydfil. Some councils run their own landlord licensing, so check which one your home is in.

Where's this from?postcodes.io (ONSPD) local authority
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Give your full postcode

CF46 stretches across Bedlinog and Trelewis, Nelson, Plymouth and more, so give your full postcode, not just 'CF46', when you ask for quotes.

Where's this from?postcodes.io (ONSPD) wards
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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, Treharris: 47.0% terraced, 23.0% semi-detached
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New to EPCs? Here's what to expect, how to get ready and what it costs, in plain English. Read the quick guide →

Wales landlord rules: quick version

  • When you let: give contract-holders a valid EPC.
  • Minimum E: generally applies to private lets.

More detail on the Treharris page. Always double-check on GOV.WALES.

Next door to CF46

CF45 · Mountain AshCF82 · HengoedCF81 · BargoedCF37 · PontypriddNP12 · BlackwoodNP24 · New Tredegar

← Energy Performance Certificate (EPC) across Treharris · all areas

Frequently asked questions

Which areas does CF46 cover?

CF46 (Treharris, Quakers Yard, Bedlinog, Nelson) includes the wards of Bedlinog and Trelewis, Nelson, Plymouth, St Cattwg, Treharris, Ystrad Mynach (ONS Postcode Directory via postcodes.io).

Which postcode districts are next to CF46?

Neighbouring districts include CF45 (Mountain Ash), CF82 (Hengoed), CF81 (Bargoed), CF37 (Pontypridd) (ONS Postcode Directory via Doogal). A pro covering CF46 may well cover these too, so it's worth asking.

How many homes are in CF46?

About 5,916 households and 14,291 residents at the 2011 Census, across 349 active postcodes (Doogal / ONS Postcode Directory).

Which council area is CF46 in?

CF46 sits in Caerphilly, Merthyr Tydfil (postcodes.io). Parliamentary constituency: Caerphilly, Merthyr Tydfil and Aberdare.

📊 The numbers behind this page
Postcode district
CF46 1
Areas covered
Treharris, Quakers Yard, Bedlinog, Nelson 2
Active postcodes
349 3
Households (2011 Census, via Doogal)
5,916 2
Population (2011 Census, via Doogal)
14,291 2
Electoral wards
Bedlinog and Trelewis, Nelson, Plymouth, St Cattwg, Treharris, Ystrad Mynach 4
Parliamentary constituencies
Caerphilly, Merthyr Tydfil and Aberdare 4
Local authority
Caerphilly, Merthyr Tydfil 4
Households privately renting (Treharris built-up area)
14.8% 5
  1. ONS Postcode Directory
  2. Doogal
  3. Doogal / ONSPD
  4. postcodes.io
  5. ONS Census 2021

Made with open data. See where it all comes from. Updated 26 October 2026.