CP12 landlord certificate · Cardiff & the Vale

Gas Safety Certificate in Cardiff

The landlord gas safety certificate (CP12) sorted properly in Cardiff, by a Gas Safe registered engineer with a straight 5.0 from 207 reviews.

★★★★★ 5.0 from 207 Google reviewsGas Safe registeredBaxi Approved Installer

If you let a property in Cardiff, an annual gas safety check on every gas appliance is a legal requirement, and the resulting certificate (the CP12) is what proves it. It is not optional and the penalties for not having one are serious, so it is worth using an engineer who does it properly and gets the paperwork to you without chasing. LMB does exactly that, with 207 Google reviews at a straight 5.0.

What the check covers, and the homeowner version

The gas safety check covers every gas appliance and flue in the property, testing for safe operation, correct pressures, ventilation and the absence of dangerous faults. For landlords the certificate is issued on completion, and for portfolios the checks can be scheduled to keep every property compliant. Homeowners can have the same safety check for peace of mind, and it is often combined with a boiler service in one visit to save a trip.

Coverage runs across Cardiff and the Vale from a Pencoed base. As a Gas Safe registered business, any fault found can be put right by the same engineer rather than needing a second visit.

5.0 from 207 Google reviews

What landlords and homeowners say

Quoted verbatim from LMB’s public Google profile. Nothing edited, nothing invented.

5.0
★★★★★
207 Google reviews
Every single review is five stars
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Read all 207 reviews on Google
CT
Carol Trevelyan
March 2026
★★★★★
Boiler install
Lloyd from LMB Plumbing did a fantastic job with my boiler installation. He was punctual, professional, and explained everything clearly.
IW
Ian Walters
March 2026
★★★★★
Professional and reliable as ever, wouldn't use anyone else!!!!
RB
Rhys Bargery
March 2026
★★★★★
Annual servicePencoed
Thank you LMB for fixing the fault, and servicing my boiler at short notice! Nice to have a reliable plumber local to Pencoed.
From his Google profile, not a stock library

Real jobs, photographed by Lloyd

Lloyd Bargery standing in front of his sign-written LMB Plumbing and Heating van
Lloyd and the LMB van. The engineer who quotes is the engineer who turns up.
Worcester combi boiler installed by Lloyd, dated commissioning sticker visible on the case
A combi install with the dated LMB commissioning sticker on the case.
Full bathroom refit by Lloyd with black towel radiator, vanity unit and walk-in shower
Full bathroom refit: towel radiator, vanity unit and walk-in shower.

Questions people ask

How much is a gas safety certificate in Cardiff?

Call or WhatsApp 07712 646488 for a straight price, which depends on the number of appliances. It can be combined with a boiler service in one visit.

How quickly can I get a CP12?

Where the diary allows, quickly, and the certificate is issued on completion of the check. Call 07712 646488 to arrange a slot that suits the tenancy.

I am a landlord with several properties, can you help?

Yes. Checks across a portfolio can be scheduled to keep every property compliant, with certificates issued on completion. Get in touch to set up a routine.

Can a homeowner get a gas safety check too?

Yes. The same safety check is available to homeowners for peace of mind, and it pairs naturally with an annual boiler service in one visit.

Service and coverage
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