06 / 06 Boilers & gas safety
Landlord Gas Safety Certificate
If you let a home with gas appliances, the law requires a gas safety check every year and a record of it for your tenants. That record is what most people call a landlord gas safety certificate, or a CP12 certificate. Our gas safety check covers every gas appliance, fitting and flue you provide. Every check is carried out by Gas Safe registered engineers, as the law requires.
We work with individual landlords, letting agents and owners of houses in multiple occupation (HMOs). Landlord gas safety checks are part of our plumbing services.
- Part ofPlumbing Services
- Our process4 clear steps
- Answered here6 common questions
- FreeSurvey & itemised quote
01Legal duty
Is a Gas Safety Certificate a Legal Requirement?
Yes. Under the Gas Safety (Installation and Use) Regulations 1998, landlords must:
- Have an annual check: Every gas appliance, fitting and flue provided for the tenants' use must be checked for safety at least every 12 months by a Gas Safe registered engineer.
- Give tenants the record: Existing tenants must receive a copy within 28 days of the check, and new tenants before they move in.
- Keep the records: Each record must be kept until at least two further checks have been carried out, which in practice means at least two years.
- Maintain the installation: Pipework, appliances and flues must be kept safe all year round, usually by following the manufacturer's servicing advice.
The duty covers appliances and flues you provide. If a tenant owns an appliance, such as their own cooker, the appliance itself is their responsibility, but the pipework that feeds it remains yours. Failing to meet these duties is a criminal offence, and the regulations are enforced by the Health and Safety Executive.
02Validity
How Long Is a Gas Safety Certificate Valid?
A gas safety record covers 12 months. The next check must be done within 12 months of the last one.
A check can be carried out up to two months before the deadline and still keep the original anniversary date. If this year's check was in June, next year's can be done from April without bringing the following deadline forward. A check done earlier than that resets the date.
The record shows the condition of the installation on the day of the check, not a promise that it will stay safe, which is why the maintenance duty continues all year.
03What is checked
What Is Checked in a Gas Safety Inspection?
For each gas appliance and flue, the engineer typically checks:
- Gas tightness: That there are no leaks from the meter to the appliances.
- Burner pressure or gas rate: That each appliance burns the amount of gas the manufacturer sets.
- Combustion: Where appropriate, a flue gas analysis to check it is burning cleanly.
- Flues: That the flue is clear and correctly fitted, and carries combustion products safely outside.
- Ventilation: That the appliance has the air supply it needs, and vents are not blocked.
- Safety devices: That flame supervision devices shut the gas off when they should.
- Physical condition: Cooker stability brackets, secure fixing, and signs of damage or overheating.
The record lists the date, the address, the landlord's name and address, each appliance and flue checked, any defects and the action taken, and the engineer's name, Gas Safe registration number and signature.
04Unsafe
What Happens If an Appliance Is Unsafe?
The engineer follows the gas industry's unsafe situations procedure, which uses three main classifications:
- Immediately Dangerous (ID): A risk to life or property now. With permission, the appliance is disconnected and labelled "Do not use".
- At Risk (AR): Faults that could become dangerous. The appliance is turned off with permission and labelled until repaired.
- Not to Current Standards (NCS): Not dangerous, but not to today's standards. Recorded and advised on.
A failed appliance must not be used until it is repaired. We can carry out the work through our boiler repair or gas plumbing services, or our boiler replacement service if a boiler is beyond economic repair.
05Service vs check
Gas Safety Check or Boiler Service?
They are different. A gas safety check confirms that each appliance is safe to use. A boiler service goes further: the boiler is opened up, cleaned and adjusted so it keeps working efficiently. Many landlords book both at the same visit, which also helps show the installation is being maintained.
06Carbon monoxide alarms
Carbon Monoxide Alarms: Landlord Duties in England
Since 1 October 2022, landlords in England, both private and social, must:
- Fit a carbon monoxide alarm in every room used as living accommodation that contains a fixed combustion appliance, such as a gas boiler, gas fire or wood burner. Gas cookers are excluded.
- Fit a smoke alarm on every storey used as living accommodation.
- Repair or replace alarms once told they are faulty.
Private landlords must also check the alarms are working on the first day of each new tenancy. We test existing carbon monoxide alarms during the gas safety check, and new alarms can be fitted through our fire alarm installation and maintenance service. If a carbon monoxide alarm sounds, see our emergency boiler services page.
07HMOs and agents
HMOs, Letting Agents and Access
- Houses in multiple occupation: The same annual check applies to every gas appliance and flue the landlord provides, in shared and private areas.
- Letting agents: A management agreement can make the agent responsible for arranging the check. It should say clearly who does what, and landlords should still make sure the check has happened.
- Access: Your tenancy agreement should give you access for the check, but you cannot force entry. If a tenant refuses, keep a record of every attempt to arrange access. We can contact tenants directly to book a time.
08Cost
How Much Is a Landlord Gas Safety Certificate?
A gas safety check is a defined job, so we give you a fixed price before we visit. The gas safety certificate cost depends on:
Every factor is priced line by line after your free survey — no guesswork, staged payments.
Book a gas safety check- 01
The number of gas appliances
A boiler alone, or a boiler, hob and gas fire.
- 02
The number of properties, such as a portfolio or several flats in one building.
- 03
Combining visits, such as adding a boiler service.
- 04
Access
Whether we arrange it with tenants or meet you or your agent.
Any repairs needed are quoted separately, in writing, before any work is done.
09Process
How It Works
Planned before we start, managed by one project manager, signed off at the end.
- 01
Book
Tell us the address, the appliances and the current record's date, and whether we should contact the tenants.
- 02
Check
The engineer tests every gas appliance, fitting and flue, and the carbon monoxide alarms.
- 03
Record
If everything passes, you receive the landlord gas safety record to keep and to give to your tenants.
- 04
Fix if needed
If anything fails, we explain why, make it safe and quote for the repair.
10Areas
Landlord Gas Safety Certificates Across London
We carry out landlord gas safety checks across London, with a focus on east and south-east London. Find out more on our pages for landlord gas safety certificates in London, landlord gas safety certificates in Ilford, landlord gas safety certificates in Barking, landlord gas safety certificates in Dagenham, landlord gas safety certificates in East Ham and landlord gas safety certificates in Orpington.
11FAQs
Landlord Gas Safety Certificate FAQs
Is a gas safety certificate a legal requirement?
Yes. Landlords must have every gas appliance, fitting and flue they provide checked at least every 12 months by a Gas Safe registered engineer, and give tenants a copy of the record.
How long is a gas safety certificate valid?
12 months. A check can be done up to two months before the deadline and keep the original anniversary date.
What is checked in a gas safety inspection?
Gas tightness, burner pressure or gas rate, combustion, flues, ventilation, safety devices and the physical condition of each appliance.
How much is a landlord gas safety certificate?
It depends on the number of gas appliances, the number of properties, whether you add a boiler service, and access arrangements. We give you a fixed price before we visit.
What is a CP12 certificate?
The informal name for the landlord gas safety record. It comes from an old form number; the record can be in any format that contains the required information.
When must tenants receive the gas safety record?
Existing tenants within 28 days of the check, and new tenants before they move in. Keep each record until at least two further checks have been done.
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Next step
Book Your Landlord Gas Safety Check
Tell us the address, the gas appliances and when the current record runs out. We will confirm a fixed price and arrange the check.
Send us the details on WhatsApp, or use our contact form.
- Free survey
- Itemised written quote
- One project manager