How to Check the Gas Safe Register Online (2026 UK Guide)
1 November 2026
How to Check the Gas Safe Register Online: Step-by-Step UK Verification Guide (2026)
To check whether a gas engineer is registered, use the official Gas Safe Register’s online checking service. Search using the engineer’s seven-digit licence number or their details, then compare the result with the person and Gas Safe ID card at your home. Before work begins, confirm that the engineer’s current qualifications cover the specific appliance and job you have booked.
A company being registered does not automatically confirm that every engineer it sends can carry out every type of gas work. Check the individual who will attend, not just the business name on a quote.
Quick check: verify the engineer online before the appointment, ask to see their current Gas Safe ID card when they arrive, and match their photo and work categories to the job.
How do you check the Gas Safe Register online?
Open the official register. Go directly to the Gas Safe Register’s engineer checking service. Make sure you are on the official Gas Safe Register website before entering any details.
Choose the checking option. Use the option for checking an engineer or business. The register’s page layout may change, so follow the current on-screen labels.
Enter the engineer’s licence number. Use the seven-digit number printed on the engineer’s current ID card. Check each digit carefully before submitting the search.
Review the result. Look for the engineer’s name, photograph, registered business and details of their qualifications. If you searched by business, open the engineer list and find the person who is expected to attend.
Confirm the work category. Check that the listed qualification covers the appliance and work you need, such as a domestic boiler service, boiler repair or gas cooker installation.
Match the online entry to the person at your property. When the engineer arrives, ask to see their Gas Safe ID card and compare the photo, name, business and licence details with the online result.
If the details do not match, pause the appointment and ask the business to explain the difference. Do not let gas work start until you have confirmed the identity and relevant qualifications.
How do you check a Gas Safe ID card number?
Find the engineer’s licence number on the front of their Gas Safe ID card. Enter that number into the official online checking service. Then compare the returned details with the card and the person standing in front of you.
Check both sides of the card. The front includes identity and registration details. The reverse lists the work categories the engineer is qualified to carry out, along with relevant dates. A valid card confirms registration details, but you still need to check that the listed category matches your job.
Use the current card, not an old photograph or a number copied from a previous quote. If an engineer says they have forgotten their card, ask them to provide details that you can verify independently before allowing work to proceed.
What should you check on the register before booking?
The engineer’s identity: the online profile and ID card should relate to the person attending.
Their current registration: check that the registration and relevant work categories are in date.
The business connection: make sure the engineer is working under the registered business named on the card and booking details.
The type of work: a qualification for one appliance or job does not automatically cover every gas appliance or task.
The fuel and appliance: if your property uses LPG or has a specialist appliance, confirm the engineer’s listed qualifications cover it.
As a practical rule, verify the exact person and job twice: once before booking, using the details supplied by the business, and again when the engineer arrives. This helps catch a last-minute change of engineer that a booking-time check would miss.
Comparing boiler or heating work?
Check a fair local price estimate before you decide which quote to accept.
Check boiler and heating costs
What if you cannot verify the engineer?
If the search returns no clear match, recheck the number and ask the business to confirm the engineer’s current details. Do not rely only on a company logo, a directory profile or a verbal assurance. If you still cannot confirm the person’s registration or work category, delay the gas work and contact Gas Safe Register for help.
You can also call Gas Safe Register on 0800 408 5500 if you need help checking an engineer. If the engineer’s name, photo, business or qualifications do not match, explain exactly what differs and ask for clarification before allowing work to start.
What does a Gas Safe check not tell you?
The register helps you confirm an engineer’s registration and the work they are qualified to do. It does not tell you whether their price is competitive, whether a repair is necessary, or whether a quote includes all parts and labour.
Ask for a written quote that describes the work, any parts, VAT and possible extra charges. If an engineer finds another fault during a service or repair, ask them to explain it and get your agreement before they carry out additional chargeable work.
If you are booking an annual boiler service, read InstantCost’s guide to how often to service a boiler so you can distinguish routine maintenance from a repair visit.
Gas safety steps before work starts
Do not attempt to inspect, repair or adjust a gas appliance yourself. If you cannot verify the attending engineer, do not allow gas work to proceed. If you suspect a gas leak or an immediate danger, leave the property and contact the gas emergency service for your area from a safe place.
Frequently asked questions
How do I check a Gas Safe engineer online?
Use the official Gas Safe Register checking service and search with the engineer’s current licence number or details. Compare the online result with their ID card and check that their qualifications cover the work you need.
How many digits are on a Gas Safe engineer’s licence number?
An engineer’s licence number is seven digits. Enter the number shown on their current ID card and check that the online result matches the engineer who will attend.
Can I check a Gas Safe business instead of an engineer?
Yes, you can look up a business. For the work at your property, also confirm which individual engineer is attending and check that person’s identity and relevant work categories.
Does Gas Safe registration mean an engineer can work on any boiler?
No. The engineer must hold the relevant qualification for the specific gas appliance and work. Check the categories on the back of the current ID card and the details shown on the register.
What should I do if the engineer’s ID card details do not match?
Do not allow gas work to begin while the mismatch is unresolved. Contact the business and Gas Safe Register to verify the engineer’s identity and current qualifications.
Can I check the engineer before they arrive?
Yes. Ask the business for the attending engineer’s name and licence number, then check them online before the appointment. Recheck the photo and ID card when the engineer arrives.
Planning boiler installation, servicing or repairs?
Use InstantCost’s heating calculator to review a regional estimate and compare local quotes.