Gas Safe Register
Plain English. Practical detail. UK context.
Gas Safe Register is the official register of businesses and engineers authorised for relevant gas work. Registration must cover the particular gas work being carried out, not just an unrelated appliance type.
Last reviewed: (editorial review against the public sources listed below).
What it means in practice
Check that your registration and competence cover the work before accepting it. HSE says anyone employed to work on domestic gas appliances must be Gas Safe registered and competent in that area. An engineer's permitted categories can be checked using the details on the back of their Gas Safe ID card.
Separate gas work from neighbouring plumbing, electrical and building tasks when planning a refurbishment. A team member who can fit a radiator is not automatically authorised to disconnect, alter or commission a gas appliance.
For homeowners
Check the engineer, not just the name printed on the invoice. Ask to see the ID card and confirm relevant categories through the register. Do not remove a boiler casing or alter a gas connection because an online guide makes the task sound simple. If you suspect an appliance is unsafe, stop using it and follow HSE's safety guidance while arranging competent help.
Check the person and the work category
A business registration and an individual engineer's competence details answer connected but different questions. The person at the property should be identifiable, and the relevant work categories should match the proposed appliance or task. HSE specifically directs homeowners to check the competencies on the back of the engineer's ID card.
This is worth doing even when a firm has carried out other work successfully. A satisfactory plumbing repair does not establish competence for a gas appliance, and one gas category does not automatically cover another. Make the intended task clear when booking so the correct person is sent.
Work which crosses several trades
A kitchen or heating refurbishment can involve gas, plumbing, electrical, carpentry and building work. Define who is responsible for each element rather than assuming that the installer coordinating the project personally performs every specialist task. The plan should prevent another trade from interfering with a gas connection, ventilation opening or flue while completing surrounding work.
At handover, the homeowner should understand what was done and what records relate to it. A service record, a repair invoice and installation documentation are not interchangeable labels. Ask the engineer to explain the documents supplied for the actual appointment.
Maintenance and concerns about safety
HSE strongly advises that gas appliances, flues and pipework are installed and regularly maintained by appropriately registered and competent engineers. Its homeowner guidance recommends servicing at least annually. The specific appliance instructions and the engineer's assessment remain important; a general online overview cannot establish that a particular appliance is safe.
If an engineer advises that an appliance should not be used, do not restart it simply because it appears to run normally. If you are unsure about the advice, follow it in the interim and seek clarification through the register or another appropriate competent route. Appearance, smell and the absence of an alarm do not amount to a safety test.
Carbon monoxide alarms are an additional precaution, not a replacement for safe installation and maintenance. Follow the relevant alarm instructions and applicable requirements for the property. This entry deliberately does not provide instructions for dismantling, adjusting or testing a gas appliance.
When arranging a visit through a larger company, ask which engineer is attending and how their identity can be checked. A company logo alone is less useful than matching the actual person to their current registration details.
Practical checks
Make the appliance type and proposed work clear when booking. Keep servicing and installation records with the property's other safety documents.
Frequently asked questions
Does registration cover every gas appliance?
No. HSE advises checking the competencies shown on the engineer’s ID card. An engineer may be registered for some categories of gas work but not others, so confirm that the actual job is covered.
Is every plumber Gas Safe registered?
No. Plumbing and gas competence are different; check the business and engineer’s relevant gas categories.
Does a boiler category cover LPG automatically?
Do not assume it does. Fuel and appliance categories must match the proposed work.
Sources and further reading
Public sources and further reading. Sources checked: 8 November 2026. Consult the original for details and later changes.