Tonypandy · CF40

EPC in CF40 (Tonypandy)? We'll point you the right way.

Covering Tonypandy, Trealaw, Penygraig, Dinas, Williamstown, Cwm Clydach, Llwynypia, Penrhiwfer, including Llwyn-y-pia, Pen-y-graig, Porth. Find accredited domestic energy assessors nearby.

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

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CF40 (Tonypandy) in a nutshell

CF40 covers Tonypandy, Trealaw, Penygraig, Dinas, Williamstown, Cwm Clydach, Llwynypia, Penrhiwfer, in Rhondda Cynon Taf. Give your full postcode when you ask for quotes, so the pro can confirm they cover your street.

Local tips for CF40

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Rhondda Cynon Taf council area

CF40 is in Rhondda Cynon Taf's area. Some councils run their own landlord licensing, so it's worth checking theirs.

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

CF40 stretches across Cwm Clydach, Llwyn-y-pia, Pen-y-graig and more, so give your full postcode, not just 'CF40', 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, Tonypandy: 71.8% terraced, 13.8% 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 Tonypandy page. Always double-check on GOV.WALES.

Next door to CF40

CF43 · FerndaleCF39 · PorthCF41 · PentreCF44 · AberdareCF42 · TreorchyCF37 · Pontypridd

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

Frequently asked questions

Which areas does CF40 cover?

CF40 (Tonypandy, Trealaw, Penygraig, Dinas, Williamstown, Cwm Clydach, Llwynypia, Penrhiwfer) includes the wards of Cwm Clydach, Llwyn-y-pia, Pen-y-graig, Porth, Tonypandy, Tonyrefail West, Trealaw (ONS Postcode Directory via postcodes.io).

Which postcode districts are next to CF40?

Neighbouring districts include CF43 (Ferndale), CF39 (Porth), CF41 (Pentre), CF44 (Aberdare), CF42 (Treorchy) (ONS Postcode Directory via Doogal). A pro covering CF40 may well cover these too, so it's worth asking.

How many homes are in CF40?

About 8,753 households and 20,541 residents at the 2011 Census, across 479 active postcodes (Doogal / ONS Postcode Directory).

Which council area is CF40 in?

CF40 sits in Rhondda Cynon Taf (postcodes.io). Parliamentary constituency: Rhondda and Ogmore.

📊 The numbers behind this page
Postcode district
CF40 1
Areas covered
Tonypandy, Trealaw, Penygraig, Dinas, Williamstown, Cwm Clydach, Llwynypia, Penrhiwfer 2
Active postcodes
479 3
Households (2011 Census, via Doogal)
8,753 2
Population (2011 Census, via Doogal)
20,541 2
Electoral wards
Cwm Clydach, Llwyn-y-pia, Pen-y-graig, Porth, Tonypandy, Tonyrefail West, Trealaw 4
Parliamentary constituencies
Rhondda and Ogmore 4
Local authority
Rhondda Cynon Taf 4
Households privately renting (Tonypandy built-up area)
22.9% 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.