CP12 vs Boiler Service – What’s the Difference?
As a UK landlord, you’re legally responsible for ensuring your rental property’s gas appliances are safe. Two terms you’ll often hear are CP12 Gas Safety Certificate and boiler service – but they’re not the same thing. Knowing the difference can help you stay compliant, protect your tenants, and avoid costly mistakes.
What is a CP12 Gas Safety Certificate?
A CP12 Gas Safety Certificate (also known simply as a Gas Safety Certificate) is a legal requirement for all rental properties in the UK that have gas appliances.
It must be carried out by a Gas Safe registered engineer and covers:
- Gas appliances (boiler, cooker, gas fire, etc.)
- Gas pipework and fittings
- Flues and ventilation
Key facts about a CP12:
- Legal obligation: You must have one renewed every 12 months.
- Tenant copy: You must provide tenants with a copy within 28 days of inspection.
- Fines & penalties: Failure to comply can result in hefty fines or even criminal charges.
What is a Boiler Service?
A boiler service is a maintenance check to ensure your boiler is running efficiently and safely.
It’s not a legal requirement, but it’s highly recommended to:
- Prevent breakdowns
- Extend boiler lifespan
- Reduce energy bills
- Spot potential problems early
A typical boiler service includes:
- Cleaning internal parts
- Checking water and gas pressure
- Testing safety devices
- Identifying wear and tear
CP12 vs Boiler Service – Key Differences
| Feature | CP12 Gas Safety Certificate | Boiler Service |
|---|---|---|
| Legal Requirement? | Yes (for landlords) | No (recommended) |
| Scope | All gas appliances, pipework, flues | Primarily the boiler |
| Frequency | Every 12 months | Annually recommended |
| Purpose | Legal compliance & safety | Maintenance & efficiency |
| Engineer Type | Gas Safe registered | Gas Safe registered |
Do You Need Both?
Yes – if you’re a landlord, you must have a valid CP12 every year.
A boiler service is optional, but many landlords choose to have one done at the same time as the CP12 to save money and keep the boiler in top shape.
Final Tips for Landlords
- Book early: Don’t leave your CP12 renewal until the last minute.
- Combine appointments: Ask your Gas Safe engineer to perform a boiler service alongside the CP12 check.
- Keep records: Store certificates for at least 2 years.
By understanding the difference between a CP12 and a boiler service, you’ll keep your property safe, tenants happy, and stay on the right side of the law.
