Gas Safety Certificate (CP12): A Complete Guide for Landlords

Nuri Uysal
Sep 15
2 min read

If you rent out a property in the UK, it’s a legal requirement to have a valid Gas Safety Certificate (also known as CP12). This proves that all gas appliances, flues, and pipework have been checked by a Gas Safe registered engineer and are safe to use.

As trusted Gas Safe engineers in London, we work with landlords and estate agencies to provide quick, reliable certification at competitive rates. Here’s everything you need to know about the Gas Safety Certificate.

What Is a Gas Safety Certificate (CP12)?

A Gas Safety Certificate is an official document issued after a Gas Safe engineer inspects your property’s gas appliances and systems. It confirms that everything is safe and meets legal requirements.

Who Needs a Gas Safety Certificate?

Landlords – You must provide a valid CP12 to tenants every 12 months.
Estate agencies – If you manage rental properties, you’re responsible for ensuring certificates are up to date.
Homeowners (optional) – While not a legal requirement, many homeowners request one for peace of mind or when selling their property.

How Often Do You Need One?

Landlords must renew their Gas Safety Certificate every 12 months. We also offer reminder services, so you never miss a deadline.

What’s Checked During the Inspection?

Gas boilers
Gas ovens and hobs
Gas fires
Flues, vents, and pipework
Carbon monoxide safety checks

If an appliance doesn’t meet safety standards, we’ll explain the issue clearly and provide repair or replacement options.

How Much Does a Gas Safety Certificate Cost?

Prices vary depending on the number of appliances, but we keep our rates affordable and transparent. Contact us today for a quick quote tailored to your property.

What Happens If You Don’t Have a CP12?

Failing to provide a Gas Safety Certificate can result in: