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Gas Safety Certificate London: Complete Landlord Guide 2024

7 December 2024 · 8 min read · By Aza & Sons Team

As a London landlord, gas safety certificates are a legal requirement. Learn what's involved, what it costs, and how to stay compliant with the law.

Gas safety certificates, also known as CP12 certificates, are a legal requirement for all landlords in England. This guide explains everything you need to know about gas safety checks for rental properties in London.

What is a Gas Safety Certificate?

A Gas Safety Certificate (CP12) is an official document confirming that all gas appliances, fittings, and flues in a rental property have been checked and are safe for use. It's issued by a Gas Safe registered engineer after a successful inspection.

Under the Gas Safety (Installation and Use) Regulations 1998, landlords must:

  1. Arrange annual gas safety checks on all gas appliances and flues
  2. Use a Gas Safe registered engineer for all checks
  3. Keep records for at least 2 years
  4. Provide a copy to tenants within 28 days of the check
  5. Provide a copy to new tenants before they move in

Penalties for Non-Compliance

Failing to comply with gas safety regulations can result in:

  • Unlimited fines in the Magistrates' Court
  • Up to 6 months imprisonment
  • Manslaughter charges if a tenant dies from CO poisoning
  • Voided landlord insurance
  • Difficulty with mortgage and legal issues
  • Tenant compensation claims

What's Checked During a Gas Safety Inspection?

Gas Appliances

  • Boilers
  • Gas fires
  • Gas cookers and hobs
  • Gas water heaters

For Each Appliance

  • Correct operation and safety
  • Adequate ventilation
  • Working safety devices
  • Integrity of flue and chimney
  • Proper gas pressure
  • No gas leaks
  • Correct installation

Pipework

  • Visible gas pipes for damage
  • Connections and joints
  • Emergency control valve

CP12 Costs in London 2024

Number of AppliancesTypical Cost
1 appliance£60-£80
2 appliances£70-£90
3 appliances£80-£100
4+ appliances£90-£120

Prices may vary by area and engineer.

How Long Does a Gas Safety Check Take?

Typically 20-30 minutes per appliance. A property with a boiler and gas hob usually takes 30-45 minutes total.

When Should You Arrange the Check?

  • 12 months from the previous check (at the latest)
  • Before a new tenant moves in if no valid certificate exists
  • Before the current certificate expires

Tip: Book 2-3 weeks before the expiry date to ensure continuity and allow time for any repairs if needed.

What If an Appliance Fails?

If a gas appliance is deemed unsafe, the engineer will:

  1. Classify the risk: Immediately Dangerous (ID), At Risk (AR), or Not to Current Standard (NCS)
  2. Disconnect dangerous appliances immediately
  3. Issue a warning notice for At Risk issues
  4. Recommend repairs before issuing a certificate

You must repair or replace faulty appliances before a certificate can be issued.

Multiple Properties?

For portfolio landlords, consider:

  • Bulk booking discounts with your engineer
  • Alignment of check dates for easier management
  • Property management software to track certificates
  • Calendar reminders for renewals

Tenant Rights and Responsibilities

Landlord Must:

  • Arrange and pay for annual checks
  • Provide certificate copy within 28 days
  • Keep the property safe
  • Arrange repairs promptly

Tenant Should:

  • Allow access for safety checks
  • Report gas issues immediately
  • Not block ventilation
  • Not tamper with gas appliances

What About Tenant-Owned Appliances?

If a tenant brings their own gas appliance (e.g., cooker):

  • You're not legally required to check it
  • You should include a clause in the tenancy agreement
  • Consider having it checked anyway for liability protection
  • The flue (if applicable) is still your responsibility

Emergency Situations

If there's a suspected gas leak:

  1. Open windows
  2. Don't use electrical switches
  3. Turn off gas at the meter
  4. Leave the property
  5. Call National Gas Emergency: 0800 111 999

Book Your Gas Safety Check

Aza & Sons provides efficient, affordable gas safety certificates across London. Our Gas Safe registered engineers offer:

  • Competitive fixed pricing
  • Same-week appointments
  • Certificate issued immediately
  • Digital and paper copies
  • Multi-property discounts

Call 07955014805 to book your landlord gas safety check today.

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