Treorchy · CF42
Gas safety certificate in CF42 (Treorchy)? We'll point you the right way.
Covering Treorchy, Cwmparc, Ynyswen, Treherbert, Blaencwm, Blaenrhondda. Find Gas Safe registered engineers nearby.
Free to use · No sign-up to search · Always check their registration before you book
Request a gas safety certificate in CF42 (Treorchy)
No gas safety engineer listed for CF42 (Treorchy) yet. Tell us what you need and we'll find you a registered gas safety engineer, free.
Request a gas safety certificate in CF42 (Treorchy)
How to check a gas safety engineer is registered: see the Treorchy page.
CF42 (Treorchy) in a nutshell
CF42 covers Treorchy, Cwmparc, Ynyswen, Treherbert, Blaencwm, Blaenrhondda, 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 CF42
Rhondda Cynon Taf council area
CF42 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 authorityGive your full postcode
CF42 stretches across Treherbert, Treorchy, so give your full postcode, not just 'CF42', when you ask for quotes.
Where's this from?
postcodes.io (ONSPD) wardsMostly mains gas round here
Most homes in Treorchy run on mains gas, so a standard boiler-and-hob check is what most people need.
Where's this from?
ONS Census 2021, Treorchy: 88.0% mains gas onlyWales landlord rules: quick version
- Every year: a gas safety check by a Gas Safe registered engineer.
- CO alarm: needed where there's a gas, oil or solid fuel appliance.
- Register: with Rent Smart Wales.
More detail on the Treorchy page. Always double-check on GOV.WALES.
Next door to CF42
Frequently asked questions
Which areas does CF42 cover?
CF42 (Treorchy, Cwmparc, Ynyswen, Treherbert, Blaencwm, Blaenrhondda) includes the wards of Treherbert, Treorchy (ONS Postcode Directory via postcodes.io).
Which postcode districts are next to CF42?
Neighbouring districts include CF41 (Pentre), CF43 (Ferndale), CF40 (Tonypandy), CF44 (Aberdare), CF35 (Pencoed) (ONS Postcode Directory via Doogal). A pro covering CF42 may well cover these too, so it's worth asking.
How many homes are in CF42?
About 5,937 households and 13,423 residents at the 2011 Census, across 310 active postcodes (Doogal / ONS Postcode Directory).
Which council area is CF42 in?
CF42 sits in Rhondda Cynon Taf (postcodes.io). Parliamentary constituency: Rhondda and Ogmore.
📊 The numbers behind this page
- Postcode district
- CF42 1
- Areas covered
- Treorchy, Cwmparc, Ynyswen, Treherbert, Blaencwm, Blaenrhondda 2
- Active postcodes
- 310 3
- Households (2011 Census, via Doogal)
- 5,937 2
- Population (2011 Census, via Doogal)
- 13,423 2
- Electoral wards
- Treherbert, Treorchy 4
- Parliamentary constituencies
- Rhondda and Ogmore 4
- Local authority
- Rhondda Cynon Taf 4
- Households heated by mains gas only (Treorchy built-up area)
- 88.0% 5
- ONS Postcode Directory
- Doogal
- Doogal / ONSPD
- postcodes.io
- ONS Census 2021
Made with open data. See where it all comes from. Updated 26 October 2026.