Caernarfon · LL55
Gas safety certificate in LL55 (Caernarfon)? We'll point you the right way.
Covering Caernarfon, Bethel, Bontnewydd, Caeathro, Brynrefail, Clwt-y-Bont, Deiniolen, Penisarwaun, Beddgelert, Ceunant, Cwm-y-Glo, Llanberis, Llanrug, Nant Gwynant, Nant Peris, Waunfawr, including Bethel a'r Felinheli, Cadnant, Canol Tref Caernarfon. Find Gas Safe registered engineers nearby.
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Request a gas safety certificate in LL55 (Caernarfon)
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Request a gas safety certificate in LL55 (Caernarfon)
How to check a gas safety engineer is registered: see the Caernarfon page.
LL55 (Caernarfon) in a nutshell
LL55 covers Caernarfon, Bethel, Bontnewydd, Caeathro, Brynrefail, Clwt-y-Bont, Deiniolen, Penisarwaun, Beddgelert, Ceunant, Cwm-y-Glo, Llanberis, Llanrug, Nant Gwynant, Nant Peris, Waunfawr, in Gwynedd. Give your full postcode when you ask for quotes, so the pro can confirm they cover your street.
Local tips for LL55
Gwynedd council area
LL55 is in Gwynedd'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
LL55 stretches across Bethel a'r Felinheli, Cadnant, Canol Tref Caernarfon and more, so give your full postcode, not just 'LL55', when you ask for quotes.
Where's this from?
postcodes.io (ONSPD) wardsMostly mains gas round here
Most homes in Caernarfon run on mains gas, so a standard boiler-and-hob check is what most people need.
Where's this from?
ONS Census 2021, Caernarfon: 79.0% 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 Caernarfon page. Always double-check on GOV.WALES.
Next door to LL55
Frequently asked questions
Which areas does LL55 cover?
LL55 (Caernarfon, Bethel, Bontnewydd, Caeathro, Brynrefail, Clwt-y-Bont, Deiniolen, Penisarwaun, Beddgelert, Ceunant, Cwm-y-Glo, Llanberis, Llanrug, Nant Gwynant, Nant Peris, Waunfawr) includes the wards of Bethel a'r Felinheli, Cadnant, Canol Tref Caernarfon, Cwm-y-glo, Deiniolen, Glaslyn, Hendre, Llanberis, Llanrug, Menai, Peblig, Penisa'r-waun, Waunfawr, Y Bontnewydd (ONS Postcode Directory via postcodes.io).
Which postcode districts are next to LL55?
Neighbouring districts include LL56 (Y Felinheli), LL61 (Llanfairpwllgwyngyll), LL60 (Gaerwen), LL54 (Caernarfon), LL59 (Menai Bridge) (ONS Postcode Directory via Doogal). A pro covering LL55 may well cover these too, so it's worth asking.
How many homes are in LL55?
About 9,231 households and 21,444 residents at the 2011 Census, across 741 active postcodes (Doogal / ONS Postcode Directory).
Which council area is LL55 in?
LL55 sits in Gwynedd (postcodes.io). Parliamentary constituency: Dwyfor Meirionnydd.
📊 The numbers behind this page
- Postcode district
- LL55 1
- Areas covered
- Caernarfon, Bethel, Bontnewydd, Caeathro, Brynrefail, Clwt-y-Bont, Deiniolen, Penisarwaun, Beddgelert, Ceunant, Cwm-y-Glo, Llanberis, Llanrug, Nant Gwynant, Nant Peris, Waunfawr 2
- Active postcodes
- 741 3
- Households (2011 Census, via Doogal)
- 9,231 2
- Population (2011 Census, via Doogal)
- 21,444 2
- Electoral wards
- Bethel a'r Felinheli, Cadnant, Canol Tref Caernarfon, Cwm-y-glo, Deiniolen, Glaslyn, Hendre, Llanberis … 4
- Parliamentary constituencies
- Dwyfor Meirionnydd 4
- Local authority
- Gwynedd 4
- Households heated by mains gas only (Caernarfon built-up area)
- 79.0% 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.