A landlord gas safety certificate, often called a CP12, is a legal annual check for rented homes with gas appliances.
The Happy Heating Co carries out landlord gas safety checks across West and North West London, testing boilers, gas fires, cookers, pipework, flues, ventilation and appliance safety devices where accessible. After the visit, you receive the certificate record for your tenant and your own compliance file. If a fault is found, we explain what needs repairing and whether the appliance must be switched off for safety.
Landlords need a valid certificate every 12 months, and it should be arranged before the old one expires.
Book a landlord gas safety certificate in West London and North West London with The Happy Heating Co. Our Gas Safe registered engineers carry out CP12 gas safety checks for rental properties, inspect the gas appliances, and issue a same-day digital Gas Safety Record from £99.
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Everything required for a valid Landlord Gas Safety Record, carried out by a Gas Safe engineer.
Boiler, hob, cooker, fire and any other gas appliance is checked for safe operation.
We test the gas installation for leaks to confirm it’s safe and sound.
We check flues and ventilation to make sure appliances are venting safely.
Flame supervision and safety devices are tested to confirm they operate correctly.
Accessible gas pipework is inspected for condition and correct installation.
You receive your CP12 / Gas Safety Record the same day, ready for your records.
Landlords are legally responsible for arranging an annual gas safety check for relevant gas appliances and flues in rental properties. The check must be completed by a Gas Safe registered engineer, and tenants must be given a copy of the Gas Safety Record.
We help landlords and property managers keep gas safety checks simple. Send the property details, arrange access and we’ll complete the inspection clearly and professionally.
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Share the address, access information and gas appliances needing inspection.
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We inspect and test the appliances, pipework and safety requirements properly.
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If everything passes, we issue the certificate and explain any concerns.
They are two different jobs, and plenty of landlords assume one covers the other. It doesn't — but there is a good reason to book them together, and it isn't the obvious one.
A safety inspection of the gas appliances and flues you provide as landlord, carried out annually by a Gas Safe registered engineer, with a record given to your tenants. It is a legal requirement, and it is an inspection rather than maintenance.
Maintenance carried out to the boiler manufacturer's own schedule. Not a legal requirement, but commonly a condition of the guarantee — and it is what keeps the appliance working rather than simply confirming it is safe today.
The reason to book both in one visit is the tenant. Arranging access to a let property is usually the hardest part of the job — harder than the work itself. Two separate appointments means two sets of notice, two days your tenant needs to be in, and two chances for it to fall through. One visit means one conversation.
You have a legal duty to get the check done. You do not have a legal right to let yourself in. That gap is where landlords get stuck — and HSE is clear about what closes it.
The test is whether you took all reasonable steps. HSE is explicit that you must not use force to enter the property, and that inspectors will look for repeated attempts rather than one. What follows is what they suggest.
Leave a notice after a missed appointment. State that an attempt was made to complete the gas safety check, and leave your contact details.
Write to the tenant. Explain that the safety check is a legal requirement and that it is for their own safety — not a formality or an inspection of them.
Let them book it themselves. Give the tenant the opportunity to arrange an appointment that suits them. This is the step most often skipped, and the one that most often works.
Keep a record of everything you do. Dates, letters, attempted visits. If it is ever questioned, this is the evidence that you acted reasonably.
If refusal continues, you may need to consider action through the courts under the terms of the tenancy. HSE suggest taking legal advice at that point.
In practice, most access problems are not refusals at all — they are missed messages and awkward timing. We work around tenants, offer appointment windows that suit them rather than us, and deal with the tenant directly if you would rather not be in the middle of it.
A gas safety check isn't a pass or fail. It's a record of what the engineer found — so you still get your certificate, with any defects written on it and the action taken. Once the work is done, a fresh check gives you a clean record for your file.
That surprises most landlords, and it's worth saying plainly: nobody withholds your paperwork. What the record does is document the property's gas safety honestly, including anything that needs putting right. Under the Gas Industry Unsafe Situations Procedure — the guidance every Gas Safe engineer works to — there are two categories of unsafe situation, and they mean very different things.
One or more recognised faults are present that could constitute a danger to life or property without further faults developing. With your permission the installation is turned off, and shouldn't be used again until the fault is repaired.
An installation that, if operated or left connected, is an immediate danger to life or property. It's disconnected with your permission and must not be used until the defect is repaired.
We explain what we've found, in plain terms — what it is, why it's been classified that way, and what it means for your tenants.
We quote for the repair before doing anything. Nothing gets fixed without your permission and your acceptance of the price.
If the part is obtainable, we fix it there and then. If it isn't, we order it and come back — and we tell you which of the two it is while we're still at the property.
You get your record either way, with the finding and the action noted on it.
Once it's repaired, we can carry out a fresh check so you have a clean certificate for your compliance file.
None of these are exotic. If you own an older let property in West London, one of them is quite likely waiting for you.
A flue hidden in a void with no inspection hatches. If the engineer can't see the flue along its length, they can't confirm it's safe. Since 1 January 2013 that means an At Risk classification and the boiler turned off until hatches are fitted. It catches out flats and loft conversions especially, and it's the one landlords are least likely to know about until it happens.
A flue that isn't properly supported. Part of the same inspection — the flue has to be continuous, properly sealed at the joints and adequately supported.
An insecure gas meter. On meters with two flexible connections we do sometimes find the meter itself isn't secure, which is an At Risk situation.
Quick answers about CP12 certificates, annual gas safety checks, tenant access, digital records and landlord responsibilities across West London and North West London.
Ask on WhatsAppA landlord gas safety certificate starts from £99, depending on the number of gas appliances at the property. Tell us how many appliances need checking and we will confirm your price before the visit.
Landlords must arrange a gas safety check every 12 months for relevant gas appliances and flues in rental properties. The check must be carried out by a Gas Safe registered engineer. The HSE confirms landlords must give existing tenants a copy of the gas safety check record within 28 days of the check being completed.
Yes, CP12 is the commonly used name for a Landlord Gas Safety Record or landlord gas safety certificate. It records the results of the annual gas safety check carried out by a Gas Safe registered engineer.
They are different jobs. The CP12 is a legal safety inspection of the appliances and flues you provide; a service is maintenance to the manufacturer's schedule and is often a guarantee condition. Booking both in one visit means arranging tenant access only once.
Every gas appliance and flue you provide as landlord — typically the boiler, gas hob, cooker and gas fire — plus accessible gas pipework, ventilation and the appliance safety devices. It is all checked by a Gas Safe registered engineer, and the findings go on your record.
Yes. Existing tenants must receive a copy of the gas safety record within 28 days of the check, and new tenants should receive the current record before they move in.
Yes. We can help arrange the visit around your tenants, making it easier for landlords, letting agents and property managers to keep the property compliant.
Yes, we issue the digital CP12 / Gas Safety Record on the same day once the gas safety check has been completed.
Yes. We can help landlords, letting agents and property managers with single properties, repeat bookings and portfolio work across West London and North West London.
You must take all reasonable steps, but you must not force entry. HSE suggest leaving a notice after a missed visit, writing to explain it is a legal safety requirement, and letting the tenant arrange their own appointment. Keep a record of every attempt.
You still get your record — it documents what was found and the action taken, rather than passing or failing you. Unsafe appliances are turned off with your permission and must not be used until repaired. Once the work is done, a fresh check gives you a clean certificate.
At Risk means faults are present that could become a danger to life or property. Immediately Dangerous means the installation is a danger right now if left connected. Both are turned off with your permission; only Immediately Dangerous is reported to the Gas Emergency Service Provider if you refuse.
No. It's advice, not a defect category, which is why you'll hear it said rather than see it written on your record. Standards change, and an older installation can be entirely safe without matching today's specification. It doesn't stop you letting the property.
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