If you own a property in the UK, especially if you’re renting it out, understanding the importance of a gas certificate is vital. Whether you’re a landlord, homeowner, or managing a house in multiple occupation (HMO), having a valid gas certificate isn’t just a good idea – it’s a legal requirement. At HMO Horizon, we help property owners across the UK stay compliant and safe with professional gas certification services that take the stress out of the process.
So, what is a gas certificate, why do you need one, and how do you get it? Let’s break it down in the simplest way possible.

What Is a Gas Certificate?
A gas certificate, also called a Gas Safety Certificate or CP12, is a legal document that demonstrates that gas appliances in a property have been checked and are safe to use. It will include a safety check of your boiler, your gas hob, your gas fire, and any other gas appliances that you may have. The checks will be carried out by a gas engineer who is registered with the Gas Safe Register (you can verify this on the Gas Safe Register website) and if everything passes the safety checks then you will be presented with a gas safety certificate.
In England and Wales this certificate is not just advisable, it is a legal requirement if you let out property. You will renew the Gas Safety Certificate every year and you will be required to keep a copy of each gas safety certificate for a minimum of 2 years. If you don’t have one you could be fined, face prosecution or worse help to kill someone.
Why Is a Gas Certificate So Important?
Gas appliances can be dangerous if they’re not working properly. Faulty boilers or cookers can lead to gas leaks or carbon monoxide poisoning, which can be deadly. A gas certificate gives you peace of mind knowing your property is safe. More importantly, it shows that you’ve done your part as a responsible landlord or property manager.
If you’re renting out an HMO, the rules are even stricter. You need to prove that your property is regularly checked and up to standard. HMO Horizon understands these rules inside out and helps landlords across the UK stay compliant with hassle-free gas certification services.
Who Can Issue a Gas Certificate?
Only a registered Gas Safe engineer can inspect your property and issue a gas certificate legally. This is the official body that now replaces CORGI registration in the UK. So, if someone is offering you a gas check and they are not Gas Safe registered, do not take the risk.
At HMO Horizon, we only use qualified engineers who are fully registered with Gas Safe. This way you can be certain the certificate you receive is 100% valid and accepted by local councils and letting agencies.
When Do You Need a Gas Certificate?
If you’re a landlord, you must have a valid gas certificate before tenants move into the property. You also need to give them a copy of the certificate within 28 days of the check. If you’re managing an HMO, your gas certificate is part of the licensing process, and without it, your property might not meet the legal standards required for letting.
Even if you’re a homeowner and not renting out your property, it’s still smart to get your gas appliances checked regularly. It’s not just about the law – it’s about protecting your home and everyone in it.
What Happens During the Gas Inspection?
A Gas Safe engineer will come to your property and check each gas appliance to make sure it’s working properly and safely. They’ll also inspect pipework, ventilation, and any flues or chimneys connected to gas systems. If everything is fine, they’ll issue your gas certificate on the spot or shortly after. If there are any problems, they’ll let you know what needs fixing before you can get the certificate.
Our team at HMO Horizon makes the whole process smooth and stress-free. We schedule appointments that work around your routine, and our engineers are always polite, tidy, and efficient.
How Much Does a Gas Certificate Cost in the UK?
The cost can vary depending on where you live and how many appliances need checking, but in general, you can expect to pay somewhere between £60 and £100. For landlords managing multiple properties or HMOs, HMO Horizon offers affordable packages and discounts to help keep costs down while staying fully compliant.
We believe in fair pricing and honest service. No hidden charges, no confusing terms – just straightforward support to keep your property safe and legal.
Why Choose HMO Horizon?
There are plenty of companies offering gas certificates in the UK, but HMO Horizon stands out because we understand the unique needs of HMO landlords and property managers. We don’t just tick boxes – we help you meet all legal requirements with minimal fuss.
We offer gas certification as one of a wider range of compliance services, including electrical checks, HMO licensing assistance, and property management advice. By engaging in gas certification with us, you will not simply receive a one-off certificate; you will receive an ongoing service to help you keep your property safe and legal, and ready for rental.
Receiving a gas certificate in the UK isn’t just another tick on your to do list, it is a crucial requirement of running a safe and legal property. Whether you rent out one flat or manage 50 HMOs, you must have gas safety checks regularly.
At HMO Horizon, we take the hassle out of this process. We book the visit and issue the certificate so you can focus on what is most important, keeping your property running safely and correctly.
In the event you do not know where to start or would just like to remove the angst of obtaining the gas certification in the UK, give us a call or visit our website.
We help landlords and property owners across the UK stay compliant, confident, and in complete control of their rental properties.