Gas Safety Certificate Cost in 2026: What UK Landlords Should Expect to Pay

What Is a Landlord Gas Safety Certificate?

A Gas Safety Certificate (officially a CP12 record) is the document issued after a Gas Safe registered engineer inspects all gas appliances, flues and pipework in your rented property. It's required annually under the Gas Safety (Installation and Use) Regulations 1998.

As a landlord, you must:

Arrange the inspection every 12 months

Give a copy to existing tenants within 28 days of the inspection

Give a copy to new tenants before they move in

Keep records for at least 2 years

How Much Does It Cost?

Prices vary by region, property size and how many gas appliances you have:

Typical prices (2026):

1 appliance (boiler only): £60–£90

2 appliances (boiler + gas hob): £80–£110

3+ appliances: £90–£130

Regional variation:

London: 30–50% higher than the national average

South East: 15–20% above average

North of England, Wales, Midlands: At or below average

Additional costs:

If the engineer finds a safety issue (e.g. gas leak, blocked flue), you'll pay for remedial work separately. Budget an additional £50–£500 depending on the severity.

How to Find a Gas Safe Registered Engineer

Only engineers registered with the Gas Safe Register (the official registration body in the UK) are legally allowed to carry out gas safety inspections and issue CP12 records.

To verify an engineer:

1. Visit gassaferegister.co.uk

2. Enter the engineer's registration number or name

3. Check they're registered and that their licence card covers domestic gas appliances

Never use an unregistered engineer. A CP12 issued by an unregistered person is not legally valid, and you'd still be liable for non-compliance.

Where to find registered engineers:

Gas Safe Register's own directory: gassaferegister.co.uk/find-an-engineer

Local search for "Gas Safe landlord certificate" + your area

Corgi HomePlan (now operated by HomeServe)

British Gas, E.ON and other utility company services (often more expensive)

What Does the Inspection Cover?

During the annual inspection, the engineer checks:

Gas boiler (all controls, heat exchanger, flue, gas pressure)

Gas cooker or hob (burners, ignition, safety cut-off)

Gas fire or back boiler

All gas pipework and connections

Carbon monoxide emissions

Ventilation requirements

The engineer will issue either a satisfactory or unsatisfactory certificate. If unsatisfactory, the specific issue must be rectified before a satisfactory CP12 can be issued.

Booking Tips for Landlords

Book 6–8 weeks in advance. Engineers are particularly busy in October–November as autumn heating demands ramp up.

Consider a service contract. Some engineers offer annual service contracts that bundle the boiler service and CP12 inspection — often better value.

Keep a digital copy. Store your CP12 in LetCompliance's document vault so you can share it instantly with tenants or inspectors.

LetCompliance sends you reminders at 90, 30, 14, 7 and 1 day before your gas certificate expires — by email or WhatsApp.

Set up automatic Gas Safety reminders →