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Planned work · London · from £79 fixed

Gas Safety Certificate (CP12) in London

A CP12 gas safety record covers every gas appliance in the property, inspected.

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Gas safety certificate (CP12) in London
No call-out feeNo night or weekend surchargeFixed price before we start12-month workmanship guarantee

tested and certificated by a Gas Safe registered engineer, booked within 48 hours and emailed the same day.

What you get

Gas safety certificate (CP12) in London: what the price includes

  • 01
    Every appliance covered

    Boiler, hob, fire and meter installation checked for tightness, combustion, ventilation and flue.

  • 02
    Same-day paperwork

    The certificate is emailed before the engineer's van is off your street.

  • 03
    Faults handled honestly

    A failed appliance gets a clear classification and a fixed repair quote, not a scare and an open cheque.

  • 04
    Reminders included

    We track the expiry and prompt you in month eleven.

  • 05
    Check our licence while we are on the doorstep

    Every one of our engineers carries a Gas Safe ID card with a licence number, an expiry date and the specific appliance categories they are qualified for. Take it, check it at gassaferegister.co.uk, and match the categories to what is in your property. A professional expects you to.

What this means in London

Local conditions we work around

London has the largest private rented sector in the country, and enforcement of gas safety duties is correspondingly active. Between the boroughs, licensing schemes for HMOs and selective licensing in some areas, landlords here face more scrutiny than most. A current CP12 for every gas appliance is the baseline, and since 2018 the absence of one also blocks a Section 21 notice in England.

Where we do this in London

Covered across London

Same published rate card and the same twelve-month workmanship guarantee everywhere below, there is no postcode loading. Each area has its own page with an arrival time taken from our job records rather than chosen for a website.

BorehamwoodPotters BarHertfordHarlowBrentwoodUpminsterDartfordGravesendOrpingtonSevenoaksEpsomSutton All London areas →
Straight answers

Gas safety certificate (CP12) in London, your questions

Who needs a gas safety certificate?
Landlords are legally required to hold a current one for every rental with gas, renewed annually, copy to tenants within 28 days. Homeowners aren't required to, but pre-sale and post-work certificates answer questions before they're asked.
What does a CP12 cost?
£79 fixed for up to two appliances, a little more beyond. Combined with a boiler service in one visit, the pair is discounted, it's the same engineer and most of the same checks.
What if an appliance fails?
It's classified (immediately dangerous / at risk / not to current standards), made safe as the law requires, and the repair quoted in writing. You choose who fixes it, the certificate fee never hostages the repair.
How long does a CP12 take?
For a single boiler, around 30 to 45 minutes. Each additional appliance adds roughly fifteen minutes. The certificate is issued digitally the same day rather than posted the following week.
What happens if an appliance fails?
It is classified, At Risk or Immediately Dangerous, and with your permission it is disconnected and capped. That is a legal obligation on the engineer, not a judgement call. The certificate is then issued covering the appliances that passed, and you get a written explanation of what failed and why.
Do I need one if I own my home?
There is no legal requirement for an owner-occupier, only for landlords. It is still the check that finds a cracked heat exchanger before it becomes carbon monoxide, and most insurers ask whether gas appliances are maintained when a claim involves one.
Is there anything specific to London landlords?
Enforcement is more active here than almost anywhere. London has the largest private rented sector in the country, every borough licenses HMOs and several operate selective licensing, so gas safety records are checked rather than assumed. Since 2018 a missing CP12 also blocks a Section 21 notice in England, which turns a paperwork lapse into a possession problem.
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