Gas Safe Engineer
London & Home Counties
Gas Safe registered engineers for commercial and domestic boilers, heating, plumbing and gas safety certificates — across London, the M25 and the wider South East.
Boiler down? Need a boiler engineer, heating engineer or a same-day commercial gas safety certificate? Tell us what you need and the right Gas Safe registered engineer is on their way.
Officially RegisteredReg. No. 197564Gas Safe Registered
Commercial & domestic qualified engineers
Same-Day Response
Boilers, certificates & emergency repairs
London-Wide Coverage
All boroughs plus the Home Counties
Open 7 Days a Week
Early mornings, evenings, and weekends
Official Gas Safe Register
The Only Legally Recognised Gas Safety Record
Every certificate we issue is the official Gas Safe Register document — the only proof of compliance recognised by HSE, insurers, councils and landlords across the UK.
- Issued by Gas Safe registered engineers only
- Covers all appliances, flues and pipework
- Accepted by HSE, councils & insurers nationwide
- Digital and paper copies provided same day
What Is a Gas Safe Engineer?
A Gas Safe engineer is a heating and gas professional who is officially registered with the Gas Safe Register — the UK's only legal gas registration body. It is a criminal offence for anyone who is not Gas Safe registered to carry out gas work in your home or business. Always ask to see an engineer's Gas Safe ID card before any work begins.
Our Gas Safe engineers are qualified across domestic and commercial gas work — from boiler servicing and central heating installs to commercial catering certificates (CP42), installation certificates (CP17), and mobile catering LPG certificates (CP44). Every job is carried out to Gas Safe and Building Regulations standards, with certificates issued on the same day.
What Does a Gas Safe Engineer Do?
- Boiler repair, servicing and installation — combi, system and conventional
- Central heating design, power-flushing and radiator upgrades
- Gas cooker, hob and fire installation and safety checks
- Commercial gas safety inspections and certificates for restaurants, offices and landlords
- Gas leak detection, pipework repairs and emergency callouts
- Smart thermostat and zone control installation
How to Check Your Engineer Is Gas Safe Registered
Every legitimate Gas Safe engineer carries an ID card with a photo, licence number and list of qualifications. You can also verify any engineer at gassaferegister.co.uk. Our engineers are always happy to show their Gas Safe ID on arrival. Read more about our qualifications, insurance and guarantees.
Gas Safety Engineer Services
Commercial & domestic gas work by fully qualified Gas Safe registered engineers — boilers, heating, plumbing, installations and certificates.
Gas Safe Boiler Engineer
Service, repair and install combi, system and conventional boilers — domestic and light-commercial — by Gas Safe registered engineers.
View details →Gas Safe Heating Engineers
Full central heating installs, power-flushes, smart controls and radiator upgrades for homes, offices and commercial premises across London.
View details →Gas Safe Plumbers
Gas + water specialists — leak detection, hot water cylinders, gas cookers, plumbing emergencies. One engineer for every gas-and-water job.
View details →Commercial Gas Safety Certificates
CP42, CP15, CP16, CP17, CP44 and LPG certificates for restaurants, offices, landlords and multi-site operators — issued same day.
View details →Commercial Gas Fitter
Commercial pipework, meter alterations, plant rooms and full kitchen fit-outs to IGEM and BS standards — fully certified.
View details →Gas Safe Installers
Notified installs of boilers, cookers, hobs and fires for homes and businesses — Gas Safe and Building Regs compliant, certificate on the day.
View details →CP12 Landlord Gas Safety Certificate
Annual landlord gas safety record for rental properties — every appliance and pipework check, digital CP12 issued the same day, from £120 + VAT.
View details →Boiler Service & Gas Safety Certificate
Combined annual boiler service and landlord gas safety certificate in a single visit — one engineer, one appointment, one fixed price.
View details →Customer Reviews
What our clients say about our gas safety services
547 reviews on Google
Booked a commercial gas safety certificate for our restaurant kitchen. The engineer arrived on time, tested all five appliances, and handed us the certificate before he left. Couldn't ask for more.
Needed an urgent CP42 certificate for an Environmental Health inspection the next day. They sent an engineer the same evening and we had everything sorted by morning. Lifesaver.
We manage several commercial properties across London and use these guys for all our annual gas safety certificates. Reliable, competitively priced, and always flexible on timing.
Had our mobile catering trailer inspected for a CP44 certificate ahead of festival season. The engineer was thorough, explained every check, and the price was exactly as quoted.
Gas Safety Certificates Issued by Our Engineers
Our Gas Safe engineers issue every type of commercial and domestic gas safety certificate. Select a certificate to view the full inspection checklist and legal requirements.
Leisure & Holiday Accommodation
Motorhomes, caravans, boats, holiday parks, and marinas.
View checklist & details →
CP15Plant Commissioning
New commercial boilers, warm air heaters, and industrial plant.
View checklist & details →
CP16Pipework Testing & Purging
New or modified commercial gas pipework systems.
View checklist & details →
CP17Installation Certificates
Every new commercial gas appliance installation.
View checklist & details →
CP42Commercial Catering
Restaurants, cafes, takeaways, hotels, pubs, and canteens.
View checklist & details →
CP44Mobile Catering & LPG
Food trucks, market stalls, and catering trailers.
View checklist & details →
How Our Gas Safe Engineers Carry Out Inspections
Our Gas Safety Inspection Process
Thorough Visual Assessment
Our engineer examines every gas appliance, pipe run, and fitting for wear, corrosion, or non-compliant installation before any testing begins.
Pipework Integrity Testing
We pressurise the gas pipework downstream of the meter and monitor for any drop, confirming no leaks exist within your installation.
Flue & Ventilation Checks
We verify that all flues draw correctly and combustion gases are safely evacuated, protecting your premises from carbon monoxide build-up.
Combustion Performance Analysis
Using calibrated flue-gas analysers, we measure CO, CO₂, and O₂ concentrations to confirm each appliance burns efficiently and within safe limits.
On-the-Spot Certification
Once every check passes, your Gas Safe registered engineer issues the relevant certificate immediately — no waiting, no follow-up visits.
Scope of the Inspection — From the Meter Onwards
Downstream of the Gas Meter Only
By regulation, our engineers inspect and test the gas installation from the outlet of the gas meter onwards. Everything upstream — the service pipe and the meter itself — falls under the gas transporter's responsibility.
Included in the inspection:
- ✓ All internal gas pipework from the meter to each appliance
- ✓ Every connected gas appliance (boilers, cookers, heaters, etc.)
- ✓ Isolation valves and emergency controls
- ✓ Flue systems, ventilation openings, and extraction
- ✓ Operating pressure at each appliance
Not included:
- ✗ The incoming supply pipe before the meter (gas transporter's asset)
- ✗ The gas meter itself (owned by your gas supplier)
- ✗ Any leak or fault on the supply side of the meter
Suspect a gas leak before the meter? Call the National Gas Emergency Service on 0800 111 999 immediately — it is free and available 24/7.
Understanding Inspection Outcomes
Every appliance inspected receives one of three classifications. Knowing what each means helps you respond quickly and keep your business running safely.
Satisfactory
The appliance meets all current standards and is safe to operate. Simply schedule your next annual check and continue trading with confidence.
At Risk (AR)
The appliance falls short of current standards but poses no immediate threat to life. Continued use is at the responsible person's discretion while remedial work is arranged promptly.
- • Ventilation below recommended levels
- • Minor flue joint deterioration
- • Overdue servicing or worn seals
- • Damaged flame supervision device
Immediately Dangerous (ID)
The appliance poses an immediate risk to life. The engineer must disconnect and isolate it on the spot. Reconnection is only permitted after a qualified repair and a fresh safety inspection.
- • Active gas leak detected
- • Blocked or severed flue
- • Dangerously high CO readings
- • Flame failure device bypassed
- • Critical ventilation deficiency
Gas Safe Engineer FAQs
What is a Gas Safe engineer?
A Gas Safe engineer is a heating and gas professional who is officially registered with the Gas Safe Register — the UK's only legal gas registration body. It is a criminal offence for anyone who is not Gas Safe registered to carry out gas work in your home or business. Always ask to see an engineer's Gas Safe ID card before any work begins.
View answer detailsHow do I know if my engineer is Gas Safe registered?
Every legitimate Gas Safe engineer carries a photo ID card with their licence number and list of qualifications. You can verify any engineer at gassaferegister.co.uk. Our engineers always show their Gas Safe ID on arrival, and you can cross-check their registration number online in seconds.
View answer detailsWhat work can a Gas Safe engineer do?
Gas Safe engineers can service, repair and install boilers, cookers, hobs and fires; design and install full central heating systems; issue commercial gas safety certificates (CP12, CP42, CP17, CP44); and carry out gas leak detection and pipework repairs. Our engineers hold qualifications for both domestic and commercial gas work.
View answer detailsWhat areas do your Gas Safe engineers cover?
Our Gas Safe registered engineers cover all 32 London boroughs plus the Home Counties — Surrey, Kent, Essex, Hertfordshire, Buckinghamshire, Berkshire, Sussex, Hampshire, Bedfordshire, Cambridgeshire, and Oxfordshire. Same-day bookings are available across the entire coverage area.
View answer detailsHow much does a Gas Safe engineer cost in London?
Gas Safe engineer call-out fees start at £95 + VAT for domestic jobs and £150 + VAT for commercial work. Boiler services, installations, and certificates are priced based on appliance count and scope. We always provide a fixed written quote before any work starts — no hidden fees.
View answer detailsDo I need a Gas Safe engineer for a boiler service?
Yes — by law, only a Gas Safe registered engineer can service a gas boiler. An annual boiler service by a Gas Safe engineer keeps your manufacturer warranty valid, reduces energy bills, and ensures safe combustion. We service all major brands including Worcester, Vaillant, Ideal, and Baxi.
View answer detailsCan a Gas Safe engineer install a new boiler?
Yes. Our Gas Safe boiler engineers are fully qualified to install combi, system, and conventional boilers for homes and businesses. Every installation is notified to Gas Safe Register and Building Control, and you receive a compliance certificate on the day of completion.
View answer detailsWhat is the difference between a plumber and a Gas Safe plumber?
A standard plumber can work on water pipes, drains, and sanitary fittings but cannot legally touch gas. A Gas Safe plumber is qualified to work on both gas and water — so they can repair a boiler leak, replace a gas cooker, or fix a hot water cylinder in a single visit. This saves time and avoids hiring two separate trades.
View answer detailsDo Gas Safe engineers work on commercial premises?
Yes — our commercial Gas Safe engineers hold advanced qualifications including COMCAT 1–5 for commercial catering, CODNCO1 for pipework, and CORT1 for open-flued appliances. We carry out inspections, repairs, and installations for restaurants, offices, schools, care homes, hotels, and industrial sites.
View answer detailsCan I get a same-day Gas Safe engineer in Central London?
Yes. We offer same-day and next-day Gas Safe engineer appointments across Central London including Westminster, the City, Mayfair, Soho, Marylebone, Kensington, and Chelsea. For emergency callouts — gas leaks, boiler breakdowns, or lost certificates — we prioritise Central London with our fastest response times.
View answer detailsGas Safe Engineers Across London & the Home Counties
Our Gas Safe registered engineers cover all London boroughs plus the surrounding Home Counties — Surrey, Kent, Essex, Hertfordshire, Buckinghamshire, Berkshire, Sussex, Hampshire, Bedfordshire, Cambridgeshire, and Oxfordshire. Same-day bookings available, 7 days a week.
Ready to Book Your Gas Safe Engineer?
Secure your certificate today. Our Gas Safe registered engineers are available seven days a week with same-day service as standard.
Starting from £150 + VAT for 1 appliance • Same-day service available