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LANDLORD ADVICE

Landlord gas safety
in Wales.

What the law actually asks of you, the two deadlines that catch landlords out, and what happens when an appliance fails the check.

5.0from 213 Google reviews

Gas Safe registeredEvery engineer on the job

Approved InstallerExtended manufacturer warranties

Book your certificate

THE SHORT ANSWER

Every gas appliance in a let property, checked every 12 months, with a copy to the tenant within 28 days.

Under the Gas Safety (Installation and Use) Regulations you must have every gas appliance and flue in a property you let checked by a Gas Safe registered engineer within twelve months of the last check. You give an existing tenant a copy of the record within 28 days, a new tenant gets one before they move in, and you keep the record yourself for two years. The record is the CP12.

THE PAPERWORK

The three deadlines, and what is on the record.

The check itself is straightforward. Most of the trouble landlords get into is about dates and copies rather than about gas.

The three deadlines

All of them are on you

Every 12 months

From the date of the last check, not the tenancy

28 days

To give an existing tenant their copy

Before move-in

A new tenant gets theirs before they take the keys

2 years

How long you keep the records yourself

No grace period

The twelve months is the twelve months

Your duty, not theirs

A tenant refusing access does not transfer it

What is on the record

Per appliance, not per property

Every gas appliance

Boiler, fire, hob, oven, each listed separately

Location and type

So it is clear what was actually inspected

Operating pressure

Checked against the manufacturer figure

Safety device checks

Tested and recorded per appliance

Flue performance

Spillage test result

Defects and actions

Anything found, and what was done about it

WHERE LANDLORDS GET CAUGHT

Three things that catch people out.

It is every appliance, not just the boiler

The gas fire in the back room and the gas hob count. Each one is listed separately on the record. If an appliance is not accessible on the day it cannot be signed off, and the certificate is incomplete.

The 28 days is from the check, not from when you get round to it

The clock starts on the day of the inspection. A new tenant needs their copy before they move in, not on the day. Emailing it counts, so there is no reason to leave it.

Access is your problem, not the tenant’s excuse

You are the one with the legal duty, so a tenant who will not let anyone in still leaves you exposed. Give us the tenant’s number when you book and we will arrange it with them directly, which usually solves it.

YOUR SITUATION

Which of these are you?

One property, one tenant

Book it annually, roughly a month early.

Booking a few weeks before the anniversary gives you room if there is an access problem or something fails and needs a return visit. Leaving it to the last week is how landlords end up out of date through no fault of their own.

Several properties

Do them on one run.

If you let more than one place in the same area we can do them back to back, which is easier for you and cheaper than separate visits. Tell us how many and roughly where when you get in touch.

New tenant about to move in

Get it done before they take the keys.

A new tenant must have the record before they move in, not within 28 days. If the existing certificate is still in date, they still need a copy of it on day one.

Tenant will not let anyone in

Give us their number.

It is still your legal duty, so this cannot be left. In practice most access problems are just scheduling, and they resolve as soon as somebody speaks to the tenant directly rather than through the landlord.

COMMON QUESTIONS

Questions we get asked.

How often does a landlord gas safety check need doing?

What is a CP12?

When does my tenant need a copy?

What happens if an appliance fails?

Can I do the certificate and the boiler service together?

Do I need one if the property is empty between tenants?

Certificate due?

Send us the property postcode and how many gas appliances there are, and we will book it in. We can arrange access with your tenant directly.

BOILER SERVICING

GAS SAFETY (CP12)

HEATING & PLUMBING

LANDLORD PACKAGES

GOT A PLUMBING OR HEATING JOB IN BRIDGEND?

Book your certificate

testimonials

Real customers. Real results.

213 five star reviews from homeowners across South Wales. Every one of them left on Google, not written by us.

David Rees

August 2026

★★★★★

An outstanding Gas Engineer and a fine individual. I cannot recommend LMB Plumbing & Heating highly enough. He installed a new Gas Boiler and overhauled our 25 year old Central Heating system for a good price.

LMB REPLIED

Thank you, David — we’re delighted to hear you had such a positive experience. We're glad the new gas boiler installation and overhaul of your…

Lee Major

July 2026

★★★★★

I can’t recommend Lloyd highly enough. From the initial Contact right through to completion of the job , his customer service was outstanding. Lloyd arrived exactly on time, was polite , friendly and professional throughout. The quality of his workmanship was excellent and he clearly takes great…

LMB REPLIED

Thank you so much, Lee, for your fantastic review and for recommending Lloyd. We’re delighted he arrived on time, was professional and friendly, and…

Dafydd Pugh

July 2026

★★★★★

Excellent. Lloyd provided an excellent service - good communication, timely arrival, left the work area clean and did the work efficiently

LMB REPLIED

Thank you Dafydd

Nigel Walters

July 2026

★★★★★

LMB responded the same day to repair a gas problem I had. Other companies I contacted were unhelpful, and most of them actually declined the work. LMB were positive & engaging from the start, fixed the problem and charged a fair price. Highly recommended, ask for Lloyd.

LMB REPLIED

Appreciate the feedback Nigel, pleasure to do work for.

Scott Rivers

July 2026

★★★★★

LMB plumbing & Heating have been fantastic since first conversation / quote to boiler install. From boiler install we had him come back to fit our shower room and the standard and service is second to none. If I could give more stars I would. Class from the lads at LMB plumbing & Heating

LMB REPLIED

Thankyou Scott, pleasure fitting the boiler and heating system for you!

Samantha

July 2026

★★★★★

I have had these gentlemen come to my property on two separate occasions. Very prompt, very polite and got the job done. I even contacted them late on Sunday evening and they politely arranged for a next day appointment, came and solved the problem. Will always use and recommend!

LMB REPLIED

Thank you so much for your wonderful review, Samantha. We're thrilled our team was prompt, polite, and able to resolve your issue quickly on short…

Craig Williams

July 2026

★★★★★

Lloyd recently fitted our new boiler. It has been fitted to a very high standard and he took care of the house when working. Polite and punctual.

LMB REPLIED

Thank you, Craig, for the excellent review. We're delighted Lloyd fitted your new boiler to such a high standard and took good care of your home. We…

Rachel 01

June 2026

★★★★★

Lloyd came out and quoted a job for us, to change our bath, sink, & toilet. He has been brilliant from start to finish I’m so glad my mum recommended him. He was incredibly professional and nothing was too much trouble. Will most certainly have him back to do future work and will 100% recommend him…

LMB REPLIED

Thank you so much, Rachel, for the wonderful review and for recommending us to your mum. I’m delighted the bathroom, sink, and toilet work met your…

David Rees

August 2026

★★★★★

LMB REPLIED

Thank you, David — we’re delighted to hear you had such a positive experience. We're glad the new gas boiler installation and overhaul of your…

Lee Major

July 2026

★★★★★

LMB REPLIED

Thank you so much, Lee, for your fantastic review and for recommending Lloyd. We’re delighted he arrived on time, was professional and friendly, and…

Dafydd Pugh

July 2026

★★★★★

Excellent. Lloyd provided an excellent service - good communication, timely arrival, left the work area clean and did the work efficiently

LMB REPLIED

Thank you Dafydd

Nigel Walters

July 2026

★★★★★

LMB REPLIED

Appreciate the feedback Nigel, pleasure to do work for.

Scott Rivers

July 2026

★★★★★

LMB REPLIED

Thankyou Scott, pleasure fitting the boiler and heating system for you!

Samantha

July 2026

★★★★★

LMB REPLIED

Thank you so much for your wonderful review, Samantha. We're thrilled our team was prompt, polite, and able to resolve your issue quickly on short…

Craig Williams

July 2026

★★★★★

Lloyd recently fitted our new boiler. It has been fitted to a very high standard and he took care of the house when working. Polite and punctual.

LMB REPLIED

Thank you, Craig, for the excellent review. We're delighted Lloyd fitted your new boiler to such a high standard and took good care of your home. We…

Rachel 01

June 2026

★★★★★

LMB REPLIED

Thank you so much, Rachel, for the wonderful review and for recommending us to your mum. I’m delighted the bathroom, sink, and toilet work met your…

ADVICE

Thirty guides,written by our team

Boilers, radiators, gas certificates, and what the jobs actually cost.

Worcester, Baxi or Vaillant?

Build quality, warranties, and what each one costs fitted.

boilers
buying

How much is a new boiler in Bridgend?

From £1,900 fitted, and what moves the price up or down.

costs
bridgend

What does a boiler service cost?

£84, what gets checked, and why skipping it voids your warranty.

costs
servicing

Landlord gas safety (CP12) in Wales

The annual legal duty, and how to do it in one visit.

landlords
legal

Boiler losing pressure?

What to check yourself, and when to stop and call.

fixes
boilers

Radiators not heating up

Cold at the top, cold at the bottom, and what each means.

fixes
radiators

ADVICE

Thirty guides,written by our team

Boilers, radiators, gas certificates, and what the jobs actually cost.

Worcester, Baxi or Vaillant?

Build quality, warranties, and what each one costs fitted.

boilers
buying

How much is a new boiler in Bridgend?

From £1,900 fitted, and what moves the price up or down.

costs
bridgend

What does a boiler service cost?

£84, what gets checked, and why skipping it voids your warranty.

costs
servicing

Landlord gas safety (CP12) in Wales

The annual legal duty, and how to do it in one visit.

landlords
legal

Boiler losing pressure?

What to check yourself, and when to stop and call.

fixes
boilers

Radiators not heating up

Cold at the top, cold at the bottom, and what each means.

fixes
radiators

ADVICE

Thirty guides,written by our team

Boilers, radiators, gas certificates, and what the jobs actually cost.

Worcester, Baxi or Vaillant?

Build quality, warranties, and what each one costs fitted.

boilers
buying

How much is a new boiler in Bridgend?

From £1,900 fitted, and what moves the price up or down.

costs
bridgend

What does a boiler service cost?

£84, what gets checked, and why skipping it voids your warranty.

costs
servicing

Landlord gas safety (CP12) in Wales

The annual legal duty, and how to do it in one visit.

landlords
legal

Boiler losing pressure?

What to check yourself, and when to stop and call.

fixes
boilers

Radiators not heating up

Cold at the top, cold at the bottom, and what each means.

fixes
radiators

BEFORE YOU GO

Keep reading.

More of the same, written by the engineers who do the work.

READ THIS FIRST

What a new boiler actually costs

Real fitted prices, what pushes them up, and the three lines to check in any quote.

Read it

→

OTHER SERVICES

New boiler installation

→

Boiler servicing

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Boiler repair

→

Gas engineer

→

WORTH A READ

Worcester vs Baxi vs Vaillant vs Ideal

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How to reset a boiler

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Cold radiators explained

→

Boiler losing pressure

→

Landlord gas safetyin Wales.

Landlord gas safetyin Wales.

Landlord gas safetyin Wales.

Every gas appliance in a let property, checked every 12 months, with a copy to the tenant within 28 days.

Every gas appliance in a let property, checked every 12 months, with a copy to the tenant within 28 days.

Every gas appliance in a let property, checked every 12 months, with a copy to the tenant within 28 days.

The three deadlines, and what is on the record.

The three deadlines, and what is on the record.

The three deadlines, and what is on the record.

The three deadlines

The three deadlines

What is on the record

What is on the record

Three things that catch people out.

Three things that catch people out.

Three things that catch people out.

It is every appliance, not just the boiler

It is every appliance, not just the boiler

The 28 days is from the check, not from when you get round to it

The 28 days is from the check, not from when you get round to it

Access is your problem, not the tenant’s excuse

Access is your problem, not the tenant’s excuse

Which of these are you?

Which of these are you?

Which of these are you?

Book it annually, roughly a month early.

Book it annually, roughly a month early.

Book it annually, roughly a month early.

Do them on one run.

Do them on one run.

Do them on one run.

Get it done before they take the keys.

Get it done before they take the keys.

Get it done before they take the keys.

Give us their number.

Give us their number.

Give us their number.

Questions we get asked.

Questions we get asked.

Questions we get asked.

How often does a landlord gas safety check need doing?

What is a CP12?

When does my tenant need a copy?

What happens if an appliance fails?

Can I do the certificate and the boiler service together?

Do I need one if the property is empty between tenants?

Certificate due?

testimonials

Real customers. Real results.

Thirty guides,written by our team

Thirty guides,written by our team

Thirty guides,written by our team

Keep reading.

Keep reading.

Keep reading.

What a new boiler actually costs

What a new boiler actually costs

What a new boiler actually costs

OTHER SERVICES

WORTH A READ

Landlord gas safety
in Wales.

Landlord gas safety
in Wales.

Landlord gas safety
in Wales.