Keystone London provides gas safety inspections and CP12 certificates for landlords, homeowners and managed properties across London.
Our Gas Safe registered engineers inspect relevant gas appliances, flues and ventilation, record the results of the safety checks and explain any faults or further work that may be required.
For landlords, regular gas safety checks form an important part of managing a rental property. For homeowners, an inspection can provide reassurance about the safe operation of gas appliances and associated systems.
Gas safety requirements and responsibilities can vary depending on how a property is occupied and managed. Keystone London provides gas safety inspections for landlords, homeowners, letting agents and managed residential properties across London.
Landlords with relevant gas appliances are responsible for arranging regular gas safety checks for rental properties. The inspection findings are recorded on the appropriate gas safety record.
Homeowners can also arrange gas safety inspections where they want additional reassurance about the condition and safe operation of gas appliances and associated systems.
We support agents and property managers who need gas safety checks coordinated across individual rental properties or wider property portfolios.
Properties with shared accommodation or more complex management arrangements may require careful coordination around appliance access, occupancy and ongoing maintenance.
A gas safety check is more than a certificate. The inspection is used to assess the safe operation of relevant gas appliances, associated flues, ventilation and safety controls within the property.
The exact checks depend on the appliances and installation present, but the inspection typically covers the following areas.
Relevant appliances such as boilers, gas fires and hobs are checked for signs of unsafe operation, damage or installation issues.
Flue arrangements are assessed where applicable to help confirm that combustion gases are being removed safely from the property.
Relevant ventilation provisions are checked to ensure appliances have the airflow they require to operate safely.
Appliance operating conditions are checked where relevant, including performance and pressure against the requirements of the installation.
Relevant safety devices and controls are checked as part of the inspection to confirm they are functioning correctly.
The results of the inspection are recorded, including the appliances checked and any defects or recommendations identified during the visit.
If an issue is identified, we explain what has been found and what further work may be required. Depending on the problem, this could involve appliance servicing, repair or other gas-related work before the system can be considered satisfactory.
A gas safety check and a boiler service are related, but they are not the same thing. Understanding the difference is particularly important for landlords responsible for maintaining gas appliances in a rental property.
A landlord gas safety check focuses on confirming that relevant gas appliances and associated systems can be operated safely at the time of inspection.
A boiler service focuses specifically on the condition, performance and maintenance of the boiler. It allows the engineer to inspect the appliance in greater detail and identify developing problems.
A gas safety inspection does not replace routine boiler maintenance. Where a rental property contains a gas boiler, arranging regular servicing alongside the appropriate gas safety checks can help keep the appliance safe, reliable and properly maintained.
Managing a rental property?
View Landlord Cover →Keystone London provides professional gas safety checks for landlords, homeowners and managed properties across Central, West and South West London. Our Gas Safe registered engineers work with everything from individual flats and period homes to managed residential portfolios.
Gas safety inspections and CP12 certificates for Chelsea landlords, homeowners and managed residential properties.
Explore Chelsea →Professional plumbing, heating and gas support for properties across Bloomsbury, Holborn, Covent Garden and surrounding Central London areas.
Explore Central London →Gas Safe engineering, boiler and plumbing support for landlords and residential properties throughout Wandsworth and nearby areas.
Explore Wandsworth →Explore the London locations covered by Keystone London for plumbing, heating, boiler and gas services.
View All Areas →London properties vary enormously. Our engineers regularly work in period houses, converted flats, apartments, rental properties and managed buildings where appliance locations, ventilation, flue routes and access can all differ.
That local experience helps us carry out gas safety inspections carefully and efficiently while respecting the property and its occupants.
Period & converted properties
Flats & apartment buildings
Rental & managed properties
Landlord portfolios
Answers to common questions about landlord gas safety checks, CP12 certificates, inspection requirements and what happens if a problem is identified.
A CP12 is the commonly used name for a landlord gas safety record. It documents the relevant gas appliances and safety checks carried out by a Gas Safe registered engineer at a rental property.
Landlords are generally required to arrange gas safety checks at least every 12 months for relevant gas appliances and flues within properties covered by the regulations.
The gas safety check must be carried out by an appropriately qualified Gas Safe registered engineer for the type of gas work and appliances being inspected.
The inspection may include relevant gas appliances such as boilers, gas fires and hobs, together with associated flues, ventilation and safety controls where applicable.
If a defect or unsafe condition is identified, the engineer will explain the issue and what action is required. Depending on the problem, the appliance may need servicing, repair or other corrective work before it can be considered satisfactory.
No. A gas safety check focuses on the safe operation of relevant gas appliances and associated systems, while a boiler service is a more detailed maintenance inspection of the boiler itself.
View Boiler Servicing →Yes. Homeowners can arrange a gas safety inspection if they want reassurance about the condition and safe operation of gas appliances in their property.
The time required depends on the number and type of appliances, property layout and whether any issues are identified during the inspection.
Cost depends on the property and the number of appliances being inspected. Contact Keystone London with the property details and we can confirm the applicable price before booking.
Yes. Keystone London provides gas safety inspections across Central, West and South West London for landlords, homeowners and managed residential properties.
View London Areas →Where an issue involves the boiler, further diagnosis or repair may be required. The engineer will explain what has been identified and whether separate repair work is appropriate.
Boiler Repair Services →We support landlords and property managers with recurring gas safety requirements and wider planned property maintenance. Ask us about ongoing landlord support when arranging your inspection.
Explore Landlord Cover →Tell us the property location and the gas appliances requiring inspection and we can help arrange the appropriate visit.
Arrange a landlord Gas Safety Certificate and CP12 inspection with Keystone’s Gas Safe registered engineers across West, South West and Central London.
CP12 inspections and landlord gas safety checks for properties across Chelsea.
View Chelsea serviceProfessional gas safety inspections and CP12 certificates for Fulham landlords.
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View Hammersmith serviceCP12 certification and professional gas safety inspections across Kensington.
View Kensington serviceLandlord Gas Safety Certificates and CP12 checks for properties throughout Putney.
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