Commercial Gas
Engineers London
Uniformed, ID-badged, Gas Safe registered engineers. Same-day boiler repairs, CP12 certificates, commercial gas & plant room — across London and the M25.
The Engineers
on Your Doorstep
Every UK Gas Plumbers engineer arrives in our royal blue jersey with the yellow chevron, carrying a Gas Safe ID card you're entitled to inspect.
- Gas Safe Registered · No. 582607
Verify our credentials live on the Gas Safe Register before we attend.
- Branded Uniform & Photo ID
Royal blue jersey, yellow chevron, UK Gas Plumbers chest badge — and a photo ID card.
- Liveried Vans, Stocked Spares
Most domestic repairs finish on the first visit — common parts carried on every van.
- London Local · M25-Wide Coverage
Engineers based across London with average 60-minute emergency response.
Commercial Gas Engineers London — Gas Safe Registered Since 2010
UK Gas Plumbers is a London-based engineering firm built around a single principle: gas work should be safe, transparent, and properly certified. Every job — from a one-off domestic boiler repair in a Victorian terrace to a multi-boiler commercial plant room overhaul in the City — is carried out by Gas Safe registered engineers backed by £5M public liability insurance.
We work for homeowners, landlords, managing agents, restaurants, hotels, schools, NHS sites, and commercial property managers across Greater London and the M25 corridor. Our reputation has been built on 547 verified five-star reviews, transparent half-hourly pricing, and the rare habit of turning up when we say we will.
Our core trade is gas, heating, and hot water — but we cover the full mechanical envelope of a property. That includes new boiler installations, annual servicing, breakdown repairs, gas leak detection, CP12 landlord certificates, CP42 commercial certificates, and full commercial kitchen installations.
For commercial clients we also deliver planned preventive maintenance (PPM) contracts, plant room servicing, commercial boiler hire and temporary boiler rental, booster pump repairs, HIU servicing, and 24/7 reactive call-out cover with engineer SLAs.
Domestic gas, boiler & heating — done same day
Same-day diagnostic and repair for Worcester Bosch, Vaillant, Ideal, Baxi, Viessmann and Glow-worm. Engineers carry common spares on the van — most jobs finish on the first visit.
- Same-day boiler repair across London & M25
- Fixed-price new boiler installation with 10-yr warranty
- Annual servicing to manufacturer spec
- CP12 landlord certificates issued in 24 hours
- Power-flush, magnetic filter & system upgrades
Commercial gas & plant room engineering
COMCAT 1–5, CODNCO1 and CORT1 qualified engineers covering rooftop plant, cellar plant rooms, live restaurant kitchens and multi-boiler cascades. CP42, CP44, CP15 and gas-interlock certification issued the same day.
- CP42 commercial gas safety certificates
- CP44 catering & restaurant gas inspections
- Gas interlock & emergency shut-off installation
- Multi-boiler cascade install & commissioning
- PPM contracts — monthly, quarterly or biannual
- 24/7 reactive call-out with engineer SLAs
£75+VAT per half hour for commercial works. PPM contracts priced per visit on survey.
From First Call to Certification
Diagnostic Call
A real engineer — not a call-centre — answers the phone, scopes the issue, and gives you an honest indication of cost and timing before we dispatch.
On-Site Survey
For installations and PPM contracts we attend on-site, take measurements, photograph plant, and produce a fixed written quote within 48 hours.
Scheduled Works
Engineers arrive in liveried vans with stocked spares. Domestic jobs get a 2-hour arrival window; commercial PPM is booked to a fixed date.
Test, Commission & Certify
All work is pressure-tested, flue-tested, and where applicable Gas Safe notified. You receive a digital certificate and full service report by email the same day.
Gas leak or no heating?
Engineers on standby.
Why Compliance Matters — And How We Protect You
Under the Gas Safety (Installation and Use) Regulations 1998, only Gas Safe registered engineers may work on gas appliances in Great Britain. Using an unregistered fitter is a criminal offence for the property owner — and invalidates your buildings insurance.
Every UK Gas Plumbers engineer is individually Gas Safe registered, ACS-certified for the appliances they work on, and carries a photographic ID card you are entitled to inspect on arrival. Our company registration, insurance, and RAMS documentation are available from our Insurance & Documents portal.
Gas Safety Engineer London
Need a gas safety engineer in London? Every UK Gas Plumbers engineer is Gas Safe registered under No. 582607 and ACS-certified to test, inspect and certify domestic and commercial gas appliances. We attend gas leaks, unsafe appliance reports, annual safety inspections and landlord checks across all London boroughs and the M25 — 24 hours a day. Speak to a gas safety engineer today, or book an emergency gas engineer for same-day attendance.
Gas Safety Certificate London
We issue every type of gas safety certificate London landlords, homeowners and businesses need — CP12 landlord certificates, CP42 commercial installation certificates, CP15 purge records and CP16 warning notices. Certificates are issued electronically the same day the inspection is completed. Browse all gas safety certificates or arrange a landlord gas safety certificate in London.
Gas Services London
Explore our dedicated gas services — from gas boiler replacement and gas boiler maintenance & PPM contracts to repairs and servicing, industrial boiler repairs and our 24/7 gas emergency service. We also offer British Gas boiler installation alternatives, combi boiler installation, combination boiler installation, combi boiler replacement, new combi boiler installation and professional boiler installation services — plus guidance on the best boiler for underfloor heating. Every job is carried out by Gas Safe registered engineers.
Grundfos Pump Repair & Service London
UK Gas Plumbers is a dedicated Grundfos pump repair and service specialist in London. Our engineers work on the commercial pump families found in building-services plant rooms every day — CRE, CR/CRN, CME, BM and TP ranges — plus the widely installed UPS, Alpha and MAGNA circulation pumps used in heating and domestic-hot-water systems.
We diagnose common Grundfos faults including no-start electrical issues, low-flow from blocked impellers or worn seals, motor burnout, vibration and bearing noise, overheating, and pressure sensor drift. Repairs cover seal and bearing replacement, motor rewinds or exchanges, impeller refurbishment, control-box repairs, VFD reprogramming, and full pump replacements when a unit is beyond economic repair.
Every repair is completed with genuine Grundfos parts, pressure and current testing, system rebalancing, and a 12-month labour-and-parts warranty. We also offer planned preventive maintenance contracts for multi-pump installations in hotels, offices, care homes and commercial plant rooms, with scheduled visits monthly, quarterly or biannually.
Grundfos Models We Service
Variable-speed multi-stage E-pumps for HVAC and process duties.
Vertical multi-stage pressure-boosting sets in plant rooms.
Compact E-pump variants for transfer and circulation.
Boiler feed and medium-pressure multi-stage pumps.
In-line circulating pumps for heating and DHW distribution.
Residential and light-commercial circulation pumps.
Fault Diagnosis
Electrical, pressure, vibration and control-signal testing to isolate the root cause before any parts are ordered.
Seal & Motor Repair
Genuine Grundfos seals, bearings, motors and impellers fitted and run-tested to factory spec.
Service Plans
Pay-as-you-go repairs, annual servicing, or fully scheduled PPM contracts with priority call-outs.
Need a Grundfos pump engineer today?
Same-day emergency Grundfos pump repair across London. Call 0208 935 5572 or book online.
Built On Compliance, Speed & Fixed Pricing
24/7 Emergency Response
Round-the-clock service for homes and businesses. Gas Safe engineers respond within 60 minutes across London for boiler breakdowns, gas leaks and heating emergencies.
Fixed Price Quotes
No hidden costs or surprise charges. Transparent fixed-price quotes for boiler repairs, landlord certificates, and commercial gas installations.
15+ Years Expertise
Trusted Gas Safe engineers serving homeowners, landlords, restaurants, hotels, offices and industrial facilities across London and the M25.
Common Questions From London Customers
How quickly can you attend an emergency?
For confirmed gas leaks, no-heat in vulnerable households, and commercial breakdowns, we aim to attend within 2 hours across central London and 4 hours across the wider M25. Call 0208 935 5572 to scope the priority level.
What does a typical boiler repair cost?
Commercial works are charged at £75+VAT per half hour. PPM contracts are priced per visit on survey. Parts are quoted upfront before any replacement.
Are you Gas Safe registered?
Yes. We are a Gas Safe registered company and every individual engineer is personally registered for the categories of work they perform. You can verify our registration at gassaferegister.co.uk.
Do you cover commercial as well as domestic?
Yes — roughly half of our work is commercial. Our engineers hold COMCAT 1–5, CODNCO1, and CORT1 qualifications for non-domestic appliances, plant rooms, and catering equipment.
Can you provide CP42 certificates for restaurants?
Yes. We carry out CP42 commercial gas safety inspections, CP44 catering checks, and gas interlock testing — typically completed in a single visit outside trading hours.
Service Areas Across London & The M25
Gas Safe engineers across every London borough and the surrounding M25 corridor. Tap a borough for its local service page.
Instant Electronic Reports & Site Notes
Planned preventive maintenance (PPM) and reactive reporting, an engineer's log, and on-site quotations. Electronic job sheets, service sheets and gas safety inspections — signed and emailed on completion.
Digital Job Sheets
Electronic job sheets completed on-site with detailed service records.
Service Reports
Comprehensive service sheets and gas safety inspection reports.
Instant Email
Reports automatically signed and emailed upon job completion.
PPM & Reactive
Both planned preventive and reactive maintenance reporting.
What Our Customers Say
Trusted by homeowners, landlords and businesses across London for reliable gas engineering services.
"Our boiler broke down on the coldest night of the year. UK Gas Plumbers came out within the hour and had it fixed by morning. Brilliant service for homeowners!"
"They handle all my CP12 certificates across 8 rental properties. Always punctual, professional, and the tenants love how friendly the engineers are. Highly recommended."
"Excellent commercial service. They responded quickly to our emergency kitchen gas issue and had us back up and running within hours. Professional and reliable."
Ready to fix your gas & heating issues?
Join 5,000+ satisfied homeowners and businesses who trust our expertise. Get a free quote today.
Plumbing, Bathroom & Drainage Services in London
Local engineers covering London and the M25 for drains, bathrooms, taps, toilets, underfloor heating and landlord certification. Same-day appointments and 24/7 emergency callout.
- CP12 Landlord Gas Safety Certificate London
- Boiler Servicing & Gas Safety Certificate London
- Drainage Service London
- Drain Unblocking London
- Toilet Unblocking London
- Toilet Replacement & Installation London
- Underfloor Heating Services London
- Bathtub Installation & Replacement London
- Bathroom Tiling Services London
- General Property Maintenance London
- Shower Installation London
- Shower Tray Replacement London
- Mixer Tap Repair & Replacement London
- InSinkErator Replacement & Installation London
