CP12 Landlord Gas Safety Certificate London

What the CP12 inspection covers

The engineer tests every gas appliance in the property against the Gas Safety (Installation and Use) Regulations 1998. That means a tightness test on the gas installation, a check of the standing and working pressure, an inspection of every appliance for correct operation and safe combustion, a flue flow and spillage test, and confirmation that permanent ventilation is present and unobstructed. Anything that fails is recorded as At Risk or Immediately Dangerous, and we explain the remedial work in plain English before we leave.

Your legal duties as a landlord

Landlords must arrange a gas safety check every 12 months, give a copy of the record to existing tenants within 28 days, issue one to new tenants before they move in, and keep records for at least two years. A check can be carried out up to two months before the current certificate expires without losing the original anniversary date, which is why we send renewal reminders automatically.

• Annual check on every gas appliance and flue you own
• Copy issued to tenants within 28 days of the inspection
• Certificate provided to new tenants at the start of a tenancy
• Records retained for a minimum of two years

Fast turnaround for agents and portfolios

We work with letting agents, block managers and private landlords who need dozens of certificates coordinated across a portfolio. Our office contacts tenants directly to arrange access, confirms appointments by text, and returns signed PDF records to a single email address or your property management system. Where an appliance fails, we quote for the remedial work immediately so the property does not sit uncertified.

Failed appliances and remedial work

If an appliance is unsafe the engineer will, with your permission, cap or disconnect it and issue a warning notice. Most failures we see are straightforward: a blocked flue terminal, a corroded heat exchanger, poor combustion caused by a dirty burner, or missing ventilation after a kitchen refit. Our engineers carry common spares and can usually repair and re-test on the same visit, so the certificate is issued without a second call-out charge.