How to Check a Gas Safe Engineer

Every engineer who carries out gas work in Great Britain, including the annual safety check on a rental property, must be on the Gas Safe Register. You can check anyone's registration in a couple of minutes on the Gas Safe Register website, by searching their name, business name, or the licence number printed on their ID card, and the result confirms whether they are currently registered and which categories of gas work they are qualified for.

Doing this check before every new engineer starts work, rather than assuming a friendly manner or a van with a logo on it means they are registered, is one of the simplest habits that protects both your tenants' safety and your own legal position as a landlord.

Why this matters

Only a Gas Safe registered engineer can legally carry out gas work or issue a valid gas safety certificate in Great Britain (Northern Ireland runs its own separate register). If an unregistered person carries out gas work in your rental property, or the person who issued your certificate turns out not to be registered for the type of appliance they checked, the certificate is not valid, regardless of how thorough the visit looked on the day.

This is not a theoretical risk. Gas Safe engineers occasionally have their registration suspended or removed, categories can lapse if an engineer does not keep up specific competencies, and unfortunately there are people who present themselves as registered when they are not. Checking the register directly, rather than relying on an ID card alone, closes that gap.

How to check the register

Search by name or company. Go to the Gas Safe Register website and use the "Check an engineer" tool. Search by the engineer's name or the name of the company they work for, and the tool returns their current registration status and the categories of work they are qualified to carry out.

Search by licence number. Every registered engineer carries a Gas Safe ID card with a licence number on it. Entering this number directly is the fastest way to confirm a specific individual, particularly useful if you have already been given a card to check rather than starting from a name search.

Check the category matches the job. Registration is granted by category, not as a blanket qualification for all gas work. Common categories include domestic natural gas appliances (boilers, fires, cookers), LPG, and commercial catering appliances. An engineer registered only for domestic natural gas work is not qualified to check an LPG appliance, even though both fall under the same overall register. Always confirm the specific category matches the appliance you need checked, not just that the person is "on the register" in general.

Check the expiry date. The search result also shows how long the registration remains valid. An engineer can be registered today and have their registration lapse a few months later if they do not renew, so a check carried out for a previous job does not guarantee the same person is still registered when you book them again.

As a worked example, a landlord booking an annual gas safety check for a flat with a combi boiler would search the engineer's name on the Gas Safe Register, confirm the "domestic natural gas" category appears against their listing, note the registration expiry date, and only then confirm the booking, rather than checking the physical ID card alone once the engineer has already arrived on site.

Checking a business rather than an individual

Many landlords book gas work through a company or letting agent's preferred contractor rather than dealing with an individual engineer directly. In this case, search the business name on the Gas Safe Register to see every engineer registered under that company, but still confirm which specific individual is attending your property and check their personal registration and category, since a business being listed does not automatically mean every engineer working for it is currently registered or qualified for every category the business offers. Larger firms sometimes employ engineers registered for different categories, so the person who turns up to service a boiler might not be the same person qualified to check a commercial catering appliance elsewhere in the same property.

Why registration lapses or gets removed

Registration is not a one-off qualification. Engineers need to keep their competence assessed periodically to remain on the register, and the Gas Safe Register can suspend or remove an engineer for reasons ranging from a lapsed assessment to a serious safety failing identified during an inspection of their work. This is precisely why checking the register at the time of booking matters more than relying on a past interaction, a business card, or even a certificate the same engineer issued for you previously: none of those confirm current status.

When to check

The obvious moment is before booking any new engineer for the first time. It is also worth checking:

• Every time you use a contractor you have not used recently, even if you used them successfully a year or two ago, since registration status can change.
• If a letting agent or managing agent arranges the check on your behalf, ask which engineer or company they use and check the registration yourself rather than assuming the agent has already verified it.
• Periodically for engineers you use regularly, particularly if you have a standing arrangement covering several properties, since it takes very little time and confirms nothing has changed.

Common mistakes

• Checking the ID card but not the online register. A physical card can look convincing without being current. The online register is the authoritative source and takes only slightly longer to check.
• Confirming registration but not the category. An engineer being "on the register" does not automatically mean they can legally check every type of gas appliance you have.
• Only checking once, for the first job. Registration is not permanent, so a periodic re-check, especially for a long-standing arrangement, is worth the small amount of time it takes.
• Assuming a letting agent has already checked. It is your legal responsibility as the landlord, not the agent's, so confirm this explicitly rather than assuming it has been done.

How Property HQ helps

Property HQ keeps your gas safety certificates, alongside EICR, EPC and licensing dates, in one compliance register, so you always know when the next check is due and have time to verify a new engineer's registration before the visit rather than booking in a rush because a certificate is about to lapse. See our full gas safety certificate guide for what the annual check covers, and our gas safety certificate cost guide for typical pricing. Our landlord certificates checklist covers how gas safety fits alongside the other certificates most portfolios need to track.

Disclaimer

This guide is general information for UK landlords, not legal or safety advice. Gas work must only ever be carried out by a Gas Safe registered engineer qualified for the specific appliance type. Check the Gas Safe Register directly before booking any gas work.