Gas Appliances
Boilers, gas fires, cookers, water heaters, and other gas appliances provided by the landlord are checked for safe operation.
Landlord Gas Safety Certificates (CP12) in London
Gas Safe registered inspections and landlord gas safety records for rented properties, letting agents, HMOs, and managed portfolios across London.
Landlord Gas Safety Checks Without the Back-and-Forth
A gas safety certificate, often called a CP12 or landlord gas safety record, confirms that the gas appliances, flues, and relevant pipework provided for tenant use have been checked by a Gas Safe registered engineer.
For landlords, the priority is simple: keep the property safe, keep the paperwork current, and avoid delays when a tenancy is starting or renewing. Wasser Group carries out gas safety inspections across London for private landlords, estate agents, property managers, and commercial-residential portfolios.
We can check the appliances at the property, record any safety-related defects, advise on remedial work where needed, and issue the certificate once the required checks have been completed.
Compliance snapshot
Built for landlords who need the certificate handled properly.
We keep the process clear for owners, agents, tenants, and portfolio managers, from access arrangements through to certificate issue and remedial advice.
- Gas Safe registered engineers
- London-wide landlord support
- Single properties and managed portfolios
12 months
Annual gas safety check cycle
28 days
Record provided to existing tenants
2 years
Recommended record retention period
What the Gas Safety Certificate Covers
A CP12 is focused on the safety of gas appliances and flues serving the rented property.
Flues and Ventilation
The engineer checks that flues are working correctly and that the appliance has the ventilation it needs to operate safely.
Pipework and Safety Devices
Relevant gas pipework, appliance condition, safety controls, and signs of unsafe installation or operation are reviewed.
Who Needs a Landlord Gas Safety Certificate?
Landlords and property managers need a current gas safety record where they provide gas appliances or flues for tenant use. This applies to many rented homes, flats, HMOs, blocks with communal gas appliances, and some accommodation linked to employment or lodging arrangements.
- Private landlords renting a house or flat with gas appliances.
- Letting agents managing annual compliance for owners.
- HMO landlords with shared kitchens, boilers, or other gas equipment.
- Property managers coordinating checks across several London addresses.
When Should It Be Renewed?
Gas safety checks must be kept up to date and are usually arranged every 12 months. Before a new tenancy starts, landlords should make sure the required checks have been completed within the previous year and that the incoming tenant receives the record before moving in.
If the inspection identifies a safety issue, prompt remedial action is needed. Unsafe appliances should not be used until the problem has been resolved by a competent Gas Safe registered engineer.
How the Appointment Works
A straightforward process for landlords, agents, and tenants.
Book the Visit
Tell us the property address, access details, and whether the tenant, landlord, or agent will be meeting the engineer.
Engineer Carries Out the Checks
The engineer inspects the relevant gas appliances, flues, and safety points, then records the required details for the landlord gas safety record.
Certificate and Advice
Once the checks are complete, the gas safety record is issued. If defects are found, we explain the next steps clearly so they can be dealt with quickly.
Common Issues Found During Gas Safety Checks
Many inspections are routine, but a check can also uncover problems that need attention before they become more serious.
Blocked or Unsafe Flues
Poor flue performance can affect how combustion gases leave the property and may require urgent attention.
Ventilation Problems
Some appliances need specific ventilation. Blocked or inadequate ventilation can make an appliance unsafe.
Appliance Faults
Faulty boilers, fires, cookers, or controls may need servicing, repair, isolation, or replacement depending on the risk.
Gas Safety Certificate FAQs
Quick answers for London landlords and agents arranging a CP12.
Is a CP12 the same as a landlord gas safety record?
Yes. CP12 is the older industry name, while landlord gas safety record is the more formal term used now. Landlords and agents often use both names.
Can the certificate be sent digitally?
Yes, records can usually be stored and shared electronically, provided the tenant can access them and a paper copy is available if requested.
Do tenant-owned appliances need checking?
The tenant is normally responsible for appliances they own, but landlords remain responsible for associated pipework and relevant installation parts.
Can you help with remedial work?
Where a fault is found, Wasser Group can advise on the next step and arrange suitable gas engineering support where required.
Need a Gas Safety Certificate in London?
Book a CP12 inspection for a single property or speak to us about certificates across a managed portfolio.
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