GAS SAFETY CERTIFICATE London

Frequently Asked Questions

What is a gas safety certificate?

A gas safety certificate is an official document issued by a Gas Safe registered engineer after inspecting all gas appliances, pipework, and boilers in a property. It confirms that the gas installation is safe to use and legally compliant. In the UK, it is legally required for all rental properties with gas appliances under the Gas Safety (Installation and Use) Regulations 1998.

What is a CP12?

CP12 is the common name for a domestic gas safety certificate. The term originates from ‘Certificate Proforma 12’, used during the former CORGI gas registration era. Since Gas Safe Register replaced CORGI in 2009, the official term is Gas Safety Certificate. However, CP12, Gas Safety Record, and Gas Safety Certificate all refer to the same legally valid document.

What is a CP12 certificate?

A CP12 certificate is a domestic gas safety record confirming that all gas appliances, boilers, flues, and pipework in a residential property have been inspected and found safe. It is required annually for all UK landlords who let a property with gas appliances. Landlords must provide a copy to existing tenants within 28 days of inspection and to new tenants before they move in.

What is a landlord gas safety certificate?

A landlord gas safety certificate is the annual CP12 inspection required by law for every rental property in the UK that contains gas appliances. It must be carried out by a Gas Safe registered engineer. The certificate covers the boiler, gas hob, gas fireplace, and all gas pipework. Failure to hold a valid certificate can result in fines of up to £6,000 per appliance and potential prosecution.

What is a gas safety check?

A gas safety check is the inspection process carried out by a Gas Safe registered engineer to assess the safety and condition of all gas appliances, flues, and pipework in a property. The check covers gas pressure, ventilation, appliance condition, burner performance, and safety device operation. The outcome is a pass (safe) or a list of defects requiring remedial action before the certificate can be issued.

Is a gas safety certificate the same as a boiler service?

No. A gas safety certificate (CP12) confirms that your gas appliances are legally safe to use. A boiler service is a maintenance procedure that cleans and tunes the boiler for efficiency. They are separate. An engineer can perform both on the same visit, but one does not automatically include the other. Liviosiv offers combined gas safety and boiler service bookings for landlords who need both.

What does a gas safety certificate look like?

A gas safety certificate is a formal document that includes: the engineer’s Gas Safe registration number and signature, the property address, the date of inspection, details of each gas appliance checked (make, model, location), the result for each appliance (pass/fail/at risk), any defects identified, and the date the certificate expires. Liviosiv delivers certificates digitally in PDF format within 24 hours.

Legal Requirements

Do landlords need a gas safety certificate?

Yes. Under the Gas Safety (Installation and Use) Regulations 1998, all UK landlords with gas appliances in a rental property must hold a valid gas safety certificate. The certificate must be renewed every 12 months. A copy must be given to existing tenants within 28 days of the inspection and to new tenants before they move in. Failure to comply is a criminal offence.

Do landlords have to do a gas safety certificate every year?

Yes. A landlord gas safety certificate must be renewed every 12 months without exception. There are no extensions or grace periods. If the certificate lapses, the landlord is in breach of the Gas Safety (Installation and Use) Regulations 1998 and risks fines, prosecution, and invalidation of their landlord insurance.

Do I need a gas safety certificate?

You need a gas safety certificate if you are a landlord renting out a property with gas appliances — this is a legal requirement. You also need one if you are selling a property, as buyers and mortgage lenders frequently request it. Homeowners are not legally required to hold one, but an annual gas safety check is strongly recommended for safety, insurance validity, and boiler warranty compliance.

Do homeowners need a gas safety certificate?

Homeowners are not legally required to hold a gas safety certificate. However, an annual gas safety check is strongly recommended. Many home insurance policies require evidence of regular gas safety checks for boiler-related claims. If you plan to sell your property, buyers or their solicitors may request a recent certificate. Liviosiv provides gas safety checks for homeowners at competitive rates.

Do you need a gas safety certificate to sell a house?

There is no legal requirement to provide a gas safety certificate when selling a house. However, solicitors, buyers, and mortgage lenders frequently request one as part of due diligence. A current certificate can speed up the sale and reduce the risk of price renegotiations over gas safety concerns. If you are selling a rental property, the existing landlord certificate should be transferred to the buyer.

Is a boiler service a legal requirement for landlords?

No. A boiler service is not a legal requirement for landlords. The legal requirement is an annual gas safety certificate (CP12). However, most boiler manufacturers require annual servicing to keep the warranty valid. Booking a gas safety check and boiler service together is the most practical and cost-effective approach for landlords.

Does a new boiler need a gas safety certificate?

Yes. A new boiler installation requires a Gas Safe registered engineer to issue a Building Regulations compliance certificate (Part P or equivalent). An annual gas safety certificate (CP12) is then required each year after installation for rental properties. The installation certificate does not replace the annual landlord gas safety certificate.

What certificates do landlords need?

UK landlords are legally required to hold: a Gas Safety Certificate (CP12) renewed annually; an Electrical Installation Condition Report (EICR) every five years; an Energy Performance Certificate (EPC) valid for ten years and with a minimum E rating; a Fire Risk Assessment for HMOs and multi-occupancy buildings; and PAT Testing for portable appliances in furnished properties. Liviosiv provides all of these from one provider.

Can a tenant refuse a gas safety check?

A tenant cannot legally prevent a landlord from carrying out a statutory gas safety check. The landlord must give at least 24 hours’ written notice before the visit. If a tenant refuses access, the landlord should document all attempts and seek legal advice. Persistent refusal may justify action through the courts. The landlord is not in breach of their legal duty if they can demonstrate they took all reasonable steps to gain access.

Can I sue my landlord for no gas safety check?

Yes. If a landlord fails to provide a valid gas safety certificate, tenants have several legal options. The local authority can impose fines of up to £6,000 per appliance on the landlord. Tenants can also report the landlord to the Health and Safety Executive (HSE) and may be able to withhold rent or seek damages if they suffer harm as a result of an unsafe gas installation.

Who is responsible for a gas safety certificate in a commercial property?

In commercial properties, the duty holder — typically the employer, landlord, or building owner — is responsible for ensuring gas appliances are safe under the Gas Safety (Installation and Use) Regulations 1998 and the Health and Safety at Work Act 1974. Commercial properties require a CP42 gas safety certificate rather than a domestic CP12. Liviosiv provides CP42 inspections for offices, restaurants, shops, and industrial premises.

Duration and Validity

How long does a gas safety check take?

A standard domestic gas safety check takes between 30 and 60 minutes for a typical property with one boiler and a gas hob. Properties with multiple gas appliances — such as gas fires, multiple hobs, or commercial equipment — may take 60 to 90 minutes. The engineer will inspect each appliance individually, check pipework, test safety devices, and verify ventilation before issuing the certificate.

How long does a gas safety certificate last?

A gas safety certificate is valid for 12 months from the date of inspection. It must be renewed every year for all rental properties with gas appliances. There are no extensions. Liviosiv recommends booking your renewal inspection at least two to four weeks before expiry to avoid compliance gaps.

How long are gas safety certificates valid for?

Gas safety certificates are valid for 12 months. After that period they expire and a new inspection is required. Landlords should keep a copy of the most recent certificate and at least one previous certificate. The legal minimum retention period is two years, but keeping all records from the start of a tenancy is best practice.

How long do landlords need to keep gas safety certificates?

Landlords must keep a record of gas safety certificates for a minimum of two years. The most recent certificate must be given to all tenants. Certificates should be stored securely — digitally or in paper form — and made available to the local authority, Health and Safety Executive, or a court if requested. Liviosiv delivers all certificates digitally for easy permanent storage.

Cost and Pricing

How much does a gas safety certificate cost?

Gas safety certificate costs in London typically start from £60 to £120 for a standard domestic property with one boiler. The exact price depends on the number of gas appliances, property size, and whether a boiler service is included. Commercial CP42 certificates are priced higher due to the complexity of commercial gas systems. Liviosiv provides transparent fixed pricing with no hidden fees — contact us for a quote.

How much is a landlord gas safety certificate?

A landlord gas safety certificate (CP12) in London typically costs between £65 and £120 depending on the number of appliances and the provider. Liviosiv offers competitive fixed pricing for single properties and multi-property discounts for landlords with portfolios and estate agencies managing multiple properties. Contact us for a tailored quote.

How much is a gas safety check?

A domestic gas safety check in London costs approximately £60 to £110 for a standard property. If you combine the gas safety check with a boiler service, most providers offer a combined rate. Liviosiv offers same-day inspections with certificate delivery within 24 hours at transparent, fixed prices with no call-out surcharges.

How much is a commercial gas safety certificate?

Commercial gas safety certificates (CP42) cost more than domestic CP12 certificates because commercial gas systems require specialist inspection techniques, more time on site, and COMCAT-qualified engineers. Prices in London typically range from £150 to £400+ depending on the size and complexity of the installation. Liviosiv provides CP42 certificates for restaurants, offices, retail, and industrial premises.

How much is a boiler service and gas safety certificate together?

Booking a boiler service and gas safety certificate (CP12) together in London typically costs between £100 and £180 when combined, compared to paying for each separately. Liviosiv recommends combining both on the same visit to save time, minimise disruption to tenants, and ensure both the legal compliance requirement and boiler warranty maintenance are covered simultaneously.

What the Check Involves

What does a gas safety check involve?

A gas safety check covers: visual inspection of all gas appliances and connections; flue gas analysis to ensure combustion gases are safely expelled; gas pressure testing to confirm correct operating pressure; assessment of ventilation around appliances; testing of safety shut-off devices; visual inspection of accessible pipework for corrosion or damage; and testing of burner performance and flame stability. The engineer will declare each appliance as safe, at risk, or immediately dangerous.

What happens during a gas safety check?

The Gas Safe registered engineer will arrive at the property, identify all gas appliances, and inspect each one in turn. For a boiler, this includes checking the flue, heat exchanger, burner, pressure relief valve, and controls. For a gas hob, the engineer checks ignition, flame stability, and safety valves. After all inspections are complete, the engineer records the results and issues the certificate — or advises on remedial work required before the certificate can be issued.

Does a gas safety check include radiators?

A gas safety check does not directly test individual radiators. However, the engineer will check the central heating system pressure, expansion vessel, and boiler controls — all of which affect radiator performance. If a radiator shows signs of a gas-related fault (such as a leak at a gas valve), this would be recorded. Radiator issues such as cold spots or bleeding requirements are typically addressed during a boiler service rather than a gas safety check.

Does a gas safety check include a boiler service?

No. A gas safety check confirms that appliances are safe and legally compliant. A boiler service is a maintenance procedure that cleans and tunes the boiler for optimal performance. The two are separate. Liviosiv can carry out both on the same visit if requested — this is the most efficient approach and is recommended for landlords who want to satisfy both their legal obligation and their boiler manufacturer’s warranty requirements.

How to Get a Gas Safety Certificate

How do I get a gas safety certificate?

To get a gas safety certificate, book an inspection with a Gas Safe registered engineer. The engineer visits your property, inspects all gas appliances and pipework, and issues the certificate if everything is safe. Liviosiv offers online booking with same-day or next-day appointments across all London boroughs. Certificates are delivered digitally within 24 hours of the inspection.

How to get gas safe registered as an engineer?

To become Gas Safe registered, you must: complete an accredited gas training course at a recognised training centre; pass the relevant ACS (Approved Competency Scheme) assessments for each gas appliance type you wish to work on; apply for registration with Gas Safe Register and pay the registration fee; and renew your ACS assessments every five years. Common pathways include completing a Gas Engineering NVQ or apprenticeship at a college or through a gas training provider.

Can I check my gas safety certificate online?

Yes. Gas Safe Register maintains a public database of registered engineers and some certificate records. You can check whether your engineer is Gas Safe registered at www.gassaferegister.co.uk. For your own property, Liviosiv provides a digital PDF certificate to your email within 24 hours of inspection, which you can store, forward to tenants, and access at any time.

Can I get a copy of my gas safe certificate?

Yes. Liviosiv delivers all certificates digitally to your email inbox within 24 hours. If you need a copy of a previous certificate, contact the engineer or company that carried out the original inspection. Gas Safe Register also maintains records. If you cannot locate the original, a new inspection will need to be booked to issue a current certificate.

Gas Safe Engineers and Registration

What is Gas Safe Register?

Gas Safe Register is the official UK register of gas engineers, replacing CORGI in 2009. It is appointed by the Health and Safety Executive (HSE) and the equivalent bodies in Northern Ireland, Isle of Man, and Guernsey. Only Gas Safe registered engineers are legally permitted to carry out gas work in the UK, including installations, servicing, and safety inspections. You can verify any engineer’s registration at www.gassaferegister.co.uk.

How to check for a gas leak in a house?

If you suspect a gas leak: leave the property immediately and do not use any electrical switches, flames, or phone inside the building; call the National Gas Emergency Service on 0800 111 999 (free, 24/7); do not re-enter the property until cleared by an engineer. Signs of a gas leak include a smell of rotten eggs or sulphur, a hissing sound near appliances or pipes, or a yellow or orange flame on a gas hob instead of blue.

Who services a boiler?

A boiler should be serviced annually by a Gas Safe registered engineer. Only Gas Safe registered engineers are legally permitted to work on gas appliances in the UK. Liviosiv’s engineers are Gas Safe registered, hold NICEIC approval, and have over six years of experience servicing all major boiler makes and models across London.

Other Certificates and Related Questions

What appliances does a landlord have to provide in the UK?

UK landlords are not legally required to provide specific appliances, but if gas appliances are present in the property — including boilers, gas hobs, gas fires, and gas water heaters — they must be maintained in safe working order and covered by an annual gas safety certificate (CP12). Any electrical appliances provided must be safe and covered by relevant PAT testing or EICR certification.

What must a landlord provide by law in the UK?

UK landlords are legally required to provide: an annual Gas Safety Certificate (CP12) for any property with gas appliances; an Electrical Installation Condition Report (EICR) every five years; a valid Energy Performance Certificate (EPC) with a minimum E rating; working smoke alarms on every floor; a carbon monoxide alarm in any room with a solid fuel or gas appliance; and a Fire Risk Assessment for HMOs and buildings with communal areas.

Do British Gas do gas safety certificates?

Yes, British Gas offers gas safety certificates through their HomeCare service. However, British Gas is not the only provider and is often more expensive than independent Gas Safe registered companies. Liviosiv provides the same legally valid CP12 certificates with same-day appointments, 24-hour certificate delivery, and competitive transparent pricing — without the premium charged by national brands.

How to get a gas and electric safety certificate?

Gas and electrical safety certificates are separate documents requiring different qualified engineers. A CP12 gas safety certificate requires a Gas Safe registered engineer. An EICR (Electrical Installation Condition Report) requires a qualified electrician registered with NICEIC, NAPIT, or an equivalent accreditation body. Liviosiv provides both gas and electrical safety certificates and can arrange a combined visit to minimise disruption to tenants.

How often do I need a gas safety certificate?

Landlords need a gas safety certificate renewed every 12 months. There is no option to extend or defer this legal requirement. For homeowners, there is no legal requirement, but an annual check is recommended by boiler manufacturers and insurance providers. Liviosiv provides renewal reminders to help landlords and property managers stay compliant without missing deadlines.