Landlord legal requirement
Gas safety certificates for London landlords
Prestige Engineers provides annual gas safety certificates (CP12) to landlords across all 33 London boroughs. Our Gas Safe registered engineers inspect all gas appliances, issue the certificate on the same day and handle the compliance paperwork — meeting your annual legal duty under the Gas Safety (Installation and Use) Regulations 1998.
About this service
What London landlords need to know about gas safety certificates
The legal obligation
Under the Gas Safety (Installation and Use) Regulations 1998, every private landlord in London is legally required to arrange an annual gas safety check on all gas appliances and flues in their rental property. The check must be carried out by a Gas Safe registered engineer — no other qualification satisfies the statutory requirement. Once completed, the landlord must provide a copy of the CP12 certificate (the Gas Safety Record) to existing tenants within 28 days of issue, and to new tenants before they move in.
The penalties for non-compliance are severe. Failure to hold a valid gas safety certificate is a criminal offence. Landlords can face fines of up to £6,000 per gas appliance found without a valid certificate, and in cases of serious negligence the court can impose a prison sentence of up to two years. Beyond the criminal exposure, many insurers will reject liability claims if the landlord cannot produce a current CP12 — leaving them personally liable for injury or damage caused by a gas incident on their property.
With 180+ verified reviews across Checkatrade (60 reviews) and MyBuilder (120 reviews), Prestige Engineers is one of the most reviewed Gas Safe registered contractors operating across London. We cover all 33 boroughs and provide clear pricing before any work starts — so there are no surprises on the day.
What the CP12 inspection covers
A gas safety inspection is a structured check, not a cursory visual sweep. Our Gas Safe engineers assess every gas appliance in the property — boiler, gas hob, gas oven, gas fire, back boiler, and any gas water heater — together with the flues and ventilation serving each appliance.
- Flue integrity — confirming combustion gases vent safely to the outside
- Gas pressure and flow rate — checked at the meter and at each appliance
- Safety device operation — testing flame failure devices and overheat stats
- Ventilation adequacy — verifying air supply meets the appliance manufacturer's requirements
- Visual pipework inspection — checking for corrosion, stress or unsupported runs
- Appliance condition — identifying visible deterioration or unsafe modifications
Where an appliance is found to be immediately dangerous, our engineer will advise on isolation and issue a Warning Notice — meeting the Gas Industry Unsafe Situations Procedure (GIUSP) and ensuring you have a documented audit trail of how the issue was handled.
Practical detail
Managing your gas safety programme
Portfolio landlords
Managing gas safety compliance across multiple properties is one of the highest-risk administrative tasks a London landlord faces. A single missed renewal date can invalidate a Section 21 notice, expose you to criminal prosecution, or void your landlord insurance — and with different tenancies starting on different dates, certificate expiry dates quickly drift out of alignment.
Prestige Engineers works with London landlords managing anywhere from two properties to large residential portfolios. We track your certificate renewal dates and contact you in advance of each expiry so you never fall out of compliance. Whether your properties are concentrated in one borough or spread across zones 1–6, our engineers operate across all 33 London boroughs from a single point of contact — no juggling multiple contractors, no gaps in coverage.
Combined boiler service and gas safety visit
An annual boiler service and a gas safety certificate inspection are two distinct requirements — but there is no reason they cannot be satisfied in a single visit. Combining them with Prestige Engineers saves you the cost and inconvenience of a second call-out, reduces the disruption to your tenants, and means one attendance covers both your regulatory obligation and your boiler manufacturer's servicing requirements (important for warranty purposes).
On timing: we recommend booking 4–6 weeks before the certificate expiry date. This gives enough flexibility to accommodate tenant schedules and any access difficulties without risking a gap in compliance. The certificate is valid for 12 months from the date of inspection — not the date of the previous certificate — so booking early does not shorten your compliance window.
Transparent pricing
£65–£95
Gas safety certificate (CP12) for a single London property. Price confirmed before booking — no hidden call-out fees. Combined boiler service and gas safety certificate available at a reduced combined rate.
Legal requirements
What the Gas Safety Regulations require
Section 21 link
Non-compliance blocks possession
A valid gas safety certificate must have been provided to the tenant before you can serve a valid Section 21 notice. A missed annual check — even by one day — invalidates any subsequent notice served. Prestige Engineers tracks renewal cycles and can provide same-day coverage for lapsed certificates.
Combined visits
Combine with annual boiler service
A gas safety certificate and annual boiler service carried out in a single visit costs significantly less than two separate call-outs. Our Gas Safe engineers carry out both in one attendance — maintaining your boiler warranty and fulfilling your legal compliance obligation at the same time.
180+ verified reviews
60 Checkatrade reviews
Verified reviews from London landlords and homeowners on Checkatrade.com.
120 MyBuilder reviews
Verified reviews from London property owners on MyBuilder.com.
London boroughs covered
Gas safety certificates by borough
Common questions
Landlord gas safety: FAQs
How often does a landlord need a gas safety certificate?
Every 12 months. The Gas Safety (Installation and Use) Regulations 1998 require landlords to arrange an annual inspection by a Gas Safe registered engineer for all gas appliances in their rental properties.
Can a tenant refuse a gas safety inspection?
Landlords must give at least 24 hours written notice before entering. If a tenant repeatedly refuses access, document every attempt and seek legal advice. The landlord must be able to demonstrate they took reasonable steps to arrange the inspection.
Does a gas safety certificate affect Section 21?
Yes — a landlord must have provided the most recent gas safety certificate to the tenant before or within 28 days of issue. Failure to do so invalidates any Section 21 notice served.
Can I combine a gas safety certificate with a boiler service?
Yes — and it is recommended. Both can be carried out in a single visit by the same Gas Safe engineer, saving cost and reducing tenant disruption.