Gas Safety Check vs Boiler Service: What Landlords Need to Know

Many landlords assume that a gas safety check and a boiler service are two names for the same appointment.

They are not.

A landlord gas safety check focuses on whether relevant gas appliances and flues are safe for tenants to use. A boiler service looks more closely at the condition, maintenance and operation of the boiler.

The two appointments can often be completed during the same visit, but landlords should confirm exactly what is included when booking.

Landlords who need a broader explanation of certificates, renewal dates and tenant documentation can also read our Gas Safety Certificate guide for landlords.

What is a landlord gas safety check?

A landlord gas safety check is a legally required inspection of gas appliances and flues that the landlord provides for tenants.

The inspection must be completed by a suitably qualified Gas Safe registered engineer. It is normally required every 12 months.

During the appointment, the engineer may check:

Gas boilers
Gas fires
Gas cookers and hobs
Gas water heaters
Associated flues
Ventilation
Appliance safety controls
Signs of unsafe combustion

After completing the inspection, the engineer provides a Landlord Gas Safety Record, commonly called a Gas Safety Certificate or CP12.

The Health and Safety Executive explains that landlords must arrange annual checks, retain the records and provide copies to tenants within the required timeframes. You can read the official HSE gas safety guidance for landlords.

Landlords who need an inspection can book a Gas Safety Certificate with Smart Property Checks.

What is a boiler service?

A boiler service is a maintenance appointment focused specifically on the boiler.

Its purpose is to check the appliance’s condition, identify developing problems and help it continue operating safely and reliably.

The exact service procedure depends on the boiler model, its age, its condition and the manufacturer’s instructions. A typical service may include:

A visual inspection of the boiler
Checks for leaks, damage or corrosion
Examination of seals and internal components
Combustion testing
Boiler-pressure checks
Inspection of the flue connection
Testing of controls and safety devices
Cleaning where required
Identification of worn components

A service is generally more detailed from a maintenance perspective than a standard landlord gas safety check.

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

No. Although parts of the two appointments may overlap, they have different purposes.

Gas safety check	Boiler service
Focuses on legal gas-safety requirements	Focuses on boiler maintenance
May cover several gas appliances	Usually focuses on one boiler
Produces a Landlord Gas Safety Record	Produces a service or maintenance report
Normally required every 12 months	Frequency follows maintenance requirements and professional advice
Confirms whether appliances are safe	Helps identify wear and developing faults

A boiler may pass its annual gas safety check while still requiring maintenance.

Similarly, a boiler service may be completed without the engineer inspecting every landlord-provided gas appliance and issuing a CP12.

The HSE advises landlords not to assume that a service automatically includes every legally required gas safety check or that a safety inspection alone provides adequate maintenance.

Does a CP12 include a boiler service?

Not automatically.

A CP12 confirms that the required landlord gas safety inspection has been completed. It does not necessarily mean the boiler received a full service.

Some engineers offer a combined appointment that includes:

The landlord gas safety inspection
A complete boiler service
A Landlord Gas Safety Record
A separate boiler service report

Before booking, ask the provider:

Is a complete boiler service included?
Will every landlord-provided gas appliance be inspected?
Will I receive a valid Landlord Gas Safety Record?
Will I receive a separate service report?
Are repairs included or quoted separately?
Is the engineer qualified for all appliances at the property?

Do not rely only on an appointment title such as “annual boiler check.” Make sure the quotation clearly describes both services.

Do landlords have to service boilers annually?

Landlords must keep landlord-provided gas appliances, pipework and flues safely maintained.

The regulations do not prescribe one identical servicing interval for every boiler. However, the HSE describes regular annual maintenance checks and subsequent repairs as good practice.

Landlords should also consider:

Boiler-manufacturer instructions
Warranty requirements
The appliance’s age
Its repair history
Advice from a Gas Safe registered engineer

An annual service may help identify issues before they result in:

Boiler breakdown
Loss of heating or hot water
Emergency contractor visits
Higher repair costs
Tenant complaints
Water leaks or property damage

The boiler service supports maintenance responsibilities, while the annual gas safety inspection supports the separate certificate requirement.

Can both appointments be completed together?

Yes. Many landlords arrange the gas safety check and boiler service during the same visit.

A combined appointment may:

Reduce the number of visits to the property
Cause less disruption to tenants
Make access easier to organise
Keep maintenance and compliance dates together
Identify safety and performance problems at the same time
Reduce the likelihood of missing one appointment

The engineer must be Gas Safe registered and qualified for the relevant appliances and work.

You can use the official Gas Safe Register engineer-checking service to confirm an engineer or business is registered.

Does the gas safety check include pipework?

Installation pipework is not automatically included in the annual appliance-and-flue safety check.

Landlords are nevertheless responsible for maintaining gas pipework in a safe condition. The HSE recommends asking the engineer to test the gas system for soundness and visually inspect accessible pipework when arranging the annual appointment.

More information is available in the official HSE guidance on landlords’ gas pipework responsibilities.

Additional pipework checks may be particularly important in:

Older rental properties
HMOs
Recently refurbished buildings
Properties with altered gas installations
Homes where tenants report a gas smell
Properties that have been vacant
Buildings where appliances have been removed

Keep pipework inspection and repair records with the property’s gas safety and maintenance documents.

When should landlords book the inspection?

The gas safety inspection must normally be completed every 12 months.

Landlords may arrange the check during the two months before the existing deadline while retaining the original renewal date, provided the relevant timing requirements are followed.

Booking early provides time to deal with:

Tenant access difficulties
Missed appointments
Contractor availability
Unsafe appliances
Replacement parts
Remedial work
Follow-up inspections

Waiting until the final few days increases the risk of the existing certificate expiring before the inspection is completed.

What documents must tenants receive?

Existing tenants must normally receive a copy of the Landlord Gas Safety Record within 28 days of the inspection.

A new tenant must receive a current copy before moving into the property.

Landlords must retain the gas safety record for at least two years.

A boiler service report can provide useful maintenance evidence, but it does not replace the required Landlord Gas Safety Record.

Landlords should store:

Current and previous gas safety records
Boiler service reports
Repair invoices
Remedial-work records
Appliance installation documents
Warranty information
Tenant access correspondence
Evidence that records were sent to tenants

What happens when an appliance is unsafe?

An appliance identified as unsafe must not continue to be used.

Where an engineer disconnects or switches off an appliance, the landlord should:

Tell the tenant not to use or reconnect it.
Arrange repairs with a qualified engineer.
Provide temporary heating where necessary.
Retain evidence of the repairs.
Obtain confirmation that the appliance is safe.
Keep the remedial documents with the original report.

Landlords should not wait until the next annual inspection to deal with a known fault.

Warning signs that need urgent attention

Landlords and tenants should arrange professional advice when a boiler or gas appliance shows signs such as:

Repeated loss of boiler pressure
Unusual banging or whistling sounds
Water leaking from the boiler
Heating or hot water repeatedly cutting out
Soot or staining around an appliance
Recurring error codes
Pilot-light or flame problems
A carbon monoxide alarm activating
A suspected smell of gas

Where a gas leak is suspected, occupants should avoid flames and electrical switches, ventilate the property where safe and contact the National Gas Emergency Service on 0800 111 999.

Landlord gas-safety checklist

Before the annual appointment, confirm that:

The existing certificate deadline is recorded
The appointment has been booked early
The engineer is Gas Safe registered
All landlord-provided gas appliances are listed
The quotation states whether servicing is included
The tenant has been given appropriate notice
Appliances are accessible
Known faults have been reported
Previous records are available
Required carbon monoxide alarms are installed
The new record will be sent to the tenant
Remedial work will be documented

Landlords managing other safety requirements can also review our electrical safety and EICR services or arrange a professional fire risk assessment.

Should landlords book both?

For many rental properties, booking both services during the same appointment is the most practical approach.

The gas safety check fulfils the annual inspection and certification requirement. The boiler service supports the landlord’s responsibility to maintain the appliance.

Before confirming the appointment, make sure the provider clearly states:

Which appliances will be inspected
Whether the boiler will receive a complete service
Which documents will be issued
Whether repairs are included
What happens if a defect is found

Common Questions

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

No. A gas safety check assesses whether relevant appliances and flues are safe. A boiler service focuses on the boiler’s condition and maintenance.

Does a CP12 include a boiler service?

Not automatically. Confirm that both services are included before booking the appointment.

Can both be completed during one visit?

Yes. A suitably qualified Gas Safe registered engineer can complete both services during the same visit.

How often does a landlord need a gas safety check?

Installation pipework is not automatically included in the annual appliance-and-flue check. Ask the engineer about a soundness test and visual inspection of accessible pipework.

Who can complete the work?

Gas safety inspections, boiler servicing and gas repairs must be completed by a Gas Safe registered engineer qualified for the relevant type of work.

Book your gas safety inspection

Smart Property Checks provides landlord gas safety inspections and property-compliance services across London, Buckinghamshire, Bedfordshire, Northamptonshire and Cambridgeshire.

Book your landlord Gas Safety Certificate before the current record reaches its renewal deadline.

Managing several properties or certificates? Contact Smart Property Checks for help arranging your inspections.