A gas safety certificate and a boiler service are not the same thing. They may happen during the same visit, but they have different purposes, different checks and different importance depending on whether you are a landlord or a homeowner.
This is a common point of confusion in the UK.
Many people use the terms interchangeably, especially when discussing rented properties, annual checks or gas boilers. In practice, however, a gas safety check and a boiler service are separate things.
Understanding the difference can help you arrange the right appointment, keep the correct records and avoid assuming one visit has covered everything when it has not.
In everyday language, people often say “gas safety certificate” or “CP12”.
In practice, this refers to the gas safety record produced after the required checks have been completed for a rented property.
Its purpose is to record the results of the gas safety check and confirm whether the relevant gas appliances, fittings and flues checked at the property were found to be safe at the time of inspection.
This is especially important for landlords.
A boiler service is a maintenance and inspection appointment focused on the boiler itself.
Its purpose is not only to check basic safety, but also to assess the condition and operation of the boiler, identify developing faults and help keep the appliance operating correctly.
A service is part of good boiler maintenance.
It can help spot wear, leaks, pressure problems or other issues before they become a full breakdown.
A gas safety check is focused on legal gas safety compliance for the relevant appliances and associated gas fittings and flues.
Depending on the property and appliance setup, the checks may include:
The exact checks depend on the property and appliances present.
For rented properties, the key point is that the gas safety record documents the result of the required annual gas safety check.
A boiler service is focused more specifically on the operation and condition of the boiler.
Depending on the boiler type and manufacturer, a service may include:
A service may help identify problems such as repeated pressure loss, unusual noises or deteriorating components before they cause a breakdown.
This is the key point.
A gas safety check is not automatically the same as a boiler service, and a boiler service is not automatically the same as a landlord gas safety check.
They overlap in some areas, but their purpose is different.
One is primarily about recording the required gas-safety checks.
The other is about routine appliance maintenance and condition.
If you arrange only one when you actually needed both, you may end up without the right record or without the level of maintenance your boiler needed.
For landlords of relevant rented properties, an annual gas safety check is a legal requirement.
That is why landlords are commonly the people asking for a gas safety certificate or CP12.
The record should be retained and provided as required.
If you are a homeowner living in your own property, the situation is different.
Homeowners do not normally arrange a landlord-style gas safety record unless there is a specific reason to do so.
However, safe gas appliances and regular maintenance still matter.
For most homeowners, the more common annual appointment is a boiler service rather than a landlord gas safety certificate.
Yes, in many cases both can be arranged during the same visit.
This is often practical for landlords who want the boiler serviced while also completing the annual gas safety check.
However, it is important to request both clearly.
Do not assume that booking one automatically means the other has been carried out.
As a practical rule:
If the boiler is already showing a fault, that may require diagnostic or repair work rather than just a routine service.
The difference matters because people often assume they have “done the gas check” when they have only had the boiler serviced, or assume the boiler has been properly maintained when only a safety record has been issued.
That can lead to confusion about:
Clarity at the time of booking helps avoid this.
TES Heating provides boiler servicing, gas-related inspections and heating support across London.
If you are unsure whether you need a landlord gas safety certificate, a boiler service or both, the safest option is to explain your property type and what you need the visit to cover.
For broader heating and plumbing work, see Plumbing & Heating Services London.
No. They are not the same. A gas safety certificate records the result of a gas safety check, while a boiler service is a maintenance and inspection appointment focused on the boiler.
There can be overlap, and both can sometimes be arranged in one visit, but you should not assume one automatically replaces the other.
For relevant rented properties, landlords need an annual gas safety check and record.
Usually, homeowners are more likely to arrange a regular boiler service rather than a landlord gas safety certificate.
Yes. In many cases this is practical, but make sure both are specifically requested when booking.
