A Gas Safety Certificate, commonly known as a CP12, proves that every gas appliance, pipe, and flue in your rental property has been checked and is safe to use. It’s a legal requirement for landlords in England with any gas supply on the property, renewed every 12 months.
KCS Electrics provides Gas Safety inspections across London, carried out by Gas Safe registered engineers, with a digital certificate issued within 24-48 hours so it doesn’t hold up letting your property.
Book your inspection now and get your CP12 quickly, with a clear report and no jargon.
During the inspection, the engineer checks each gas appliance individually, boilers, cookers, gas fires, along with the connecting pipework and flues, testing for gas tightness, ventilation, and correct operation. Anything unsafe is flagged, and where necessary, isolated on the spot until it’s repaired.
Once complete, you receive a Landlord Gas Safety Record confirming the property is safe, or setting out what needs fixing before it can be signed off.
It’s worth knowing what a Gas Safety Certificate doesn’t cover. It only assesses gas appliances, pipework, and flues, not your fixed electrical wiring and not appliances that don’t run on gas. If your property has mains electricity, which almost all rental properties do, you’ll also need an EICR. If you supply plug-in appliances like ovens or washing machines as part of the tenancy, those fall under PAT testing instead. Not sure which certificates your specific property needs? Our EICR vs Gas Safety Certificate vs PAT Testing guide breaks it down.
Yes. Under the Gas Safety (Installation and Use) Regulations 1998, landlords with gas appliances in a rented property must have them checked by a Gas Safe registered engineer at least once every 12 months, and must:
Renewing early? You can carry out your annual check up to 2 months before the anniversary of the previous one without losing your renewal date. If last year’s check was on 15 June, you can book this year’s any time from mid-April and the certificate will still run through to 15 June next year, giving you a sensible booking window rather than a single fixed day to hit.
Non-compliance is enforced by the Health and Safety Executive and treated seriously, this isn’t a simple civil fine like some other landlord paperwork. The HSE can prosecute, and in the most serious cases involving gas leaks or carbon monoxide poisoning, landlords have faced far more severe consequences than a fine.
What’s changed recently: the Renters’ Rights Act 2025 abolished Section 21 “no-fault” evictions in England from 1 May 2026. Gas safety compliance now factors into Section 8 possession claims rather than blocking a Section 21 notice as it previously did, so it remains just as relevant to landlords even though the mechanism has changed.
For complete compliance support, explore our Landlord Safety Certificate Services and manage every required certificate in one place.
Our Gas Safety Inspection covers every part of your gas installation:
Every inspection is carried out by a Gas Safe registered engineer using calibrated testing equipment, so nothing gets missed. You’ll receive your Gas Safety Certificate (CP12) confirming whether the property is safe, or setting out clearly what needs fixing first.
If you let a House in Multiple Occupation (HMO), the same annual Gas Safety Certificate requirement applies, but HMOs often have more gas appliances to check, multiple kitchens, individual heating in some room configurations, which can mean a longer inspection. Many London councils also require a current, valid CP12 as part of your HMO licence application or renewal, so it’s worth timing your inspection to align with your licensing deadlines. We regularly carry out gas safety checks for HMO landlords across London and can advise on what your specific council requires.
Pricing depends on the number of gas appliances and the complexity of the installation. A property with a single boiler typically costs less to inspect than one with a boiler, gas hob, and gas fire all needing testing. We give you a clear, tailored price so you’re only paying for the inspection your property actually needs.
Once the inspection is complete, most CP12 certificates are issued digitally within 24 to 48 hours, so you can stay compliant without delay.
A Gas Safety Certificate is only as reliable as the engineer who carries it out. KCS Electrics provides trusted gas safety inspections across London for landlords, letting agents, and property managers.
We offer:
We know exactly what landlords are required to do, and we keep the process straightforward. Every certificate we issue reflects the genuine condition of your gas installation, so you always know exactly where you stand.
Usually 30 minutes to an hour for a standard property, depending on the number of appliances.
Testing each gas appliance, checking gas pressure, inspecting flues, and confirming ventilation is correct, so everything is safe to use.
Book a Gas Safe registered engineer to carry out the inspection and issue your CP12 once testing is complete.
Cost depends on the number of appliances and the property size. You’ll receive a tailored price once we understand your property’s setup.
Not legally, but regular gas safety checks are strongly recommended for any homeowner with gas appliances, particularly older boilers or before selling a property.
Every 12 months for a rented property. You can renew up to 2 months before the anniversary date without losing your existing renewal cycle.
For a Gas Safety Certificate London landlords rely on, KCS Electrics offers professional gas safety inspections for homes and businesses, fully compliant with UK regulations. We cover East, North, South, and West London, including Ilford, Barking, and the surrounding areas.
Book your inspection today and get your CP12 certificate quickly, without complications.
