Every landlord in London letting a property with gas appliances must hold a valid Gas Safety Certificate (CP12). Call 020 7183 4810 to book your inspection.
Need your CP12 certificate?
Gas Safe registered landlord inspections across London.
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What the CP12 covers
A Gas Safe registered engineer inspects every gas appliance, flue and piece of pipework in the property, testing for leaks, correct ventilation and safe combustion. You receive a certificate confirming the property meets legal gas safety standards, valid for 12 months.
Your legal obligations as a landlord
- An annual gas safety check by a Gas Safe registered engineer
- A copy of the certificate given to tenants within 28 days of the check
- A copy given to new tenants before they move in
- Records kept for at least two years
Why we do not recommend leaving this to chance
| Common assumption | Why it is risky |
|---|---|
| “My letting agent handles it” | Ultimate legal responsibility stays with the landlord — always confirm it has actually been done and documented. |
| “It is not urgent if the tenant has not complained” | This is a legal requirement regardless of complaints, and failing to comply can block eviction proceedings. |
What it costs to skip it
Landlords without a valid CP12 face criminal prosecution, unlimited fines, and can be unable to serve a valid Section 21 notice. Beyond the legal risk, it puts tenants’ safety at risk.
How Olia’s Plumbing & Heating handles it
- Call 020 7183 4810 to book your inspection
- Our Gas Safe registered engineer checks every gas appliance and pipe
- You receive your CP12 certificate on the day, ready to share with tenants
Book your landlord gas safety check
Fast, compliant CP12 certification across London.
Frequently asked questions
How often do I need a CP12?
Every 12 months, without exception, for any rental property with gas appliances.
What happens if I do not have one?
You risk prosecution, unlimited fines, and being unable to legally evict a tenant using a Section 21 notice.
Do I need to give tenants a copy?
Yes, within 28 days of the check and before any new tenant moves in.
Stay compliant and keep your tenants safe. Call 020 7183 4810 to book.
Related services: Landlord Gas Inspection Central London, Landlord Gas Safety Requirements, Gas Safe Engineer London
Peyman
CEO & Founder — Gas Safe Registered Engineer
Peyman is the founder of Olia's Plumbing & Heating, a London based team with over 15 years of hands on experience in boiler installation and repair, central heating, gas work and emergency plumbing. He personally oversees jobs across Central and West London and writes these guides to help homeowners understand their heating systems.
- Gas Safe Registered
- 15+ years experience
- Covering all of London
