Gas Safe registered · Statutory UK register · 24/7 dispatch
Gas Safe Plumber London
Gas Safe registered plumber and heating engineer across every London borough. Boiler installation, repair, service, Landlord Gas Safety Records and emergency gas work — all under statutory Gas Safe registration. Fixed price before work starts.
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Gas Safe registration — the UK statutory register for gas work
Since 1 April 2009 it has been a criminal offence for anyone in the UK to carry out gas work without being Gas Safe registered. The register — run under the authority of the Health and Safety Executive (HSE) — replaced the older CORGI scheme and became the single legal standard for gas engineers. Every boiler installation, every boiler repair, every annual boiler service, every hob install, every gas fire replacement, and every Landlord Gas Safety Record (CP12) must be delivered by a Gas Safe registered engineer. Work done by an unregistered person is a criminal offence, voids property insurance, and can invalidate the boiler manufacturer's warranty.
The register works two ways. Engineers pass initial ACS (Accredited Certification Scheme) training and category-specific competency assessments, then re-certify every five years for each category they hold (natural gas domestic, LPG, commercial catering, etc.). Every registered engineer carries a photo ID card with their registration number, license expiry, and specific competency categories. The register — searchable in real time at gassaferegister.co.uk — allows any homeowner or landlord to verify a number before letting an engineer touch any gas fitting. Ask for the card; a genuine engineer produces it without hesitation.
What Gas Safe covers: any fixed gas appliance in a UK domestic or commercial building. Boilers (combi, system, heat-only), gas hobs, gas cookers, gas fires, gas water heaters, and the pipework and meter connections that feed them. What it does not cover: water plumbing (that's Water Regulations 1999 competency, via WaterSafe registration) and unvented hot water cylinders specifically (that's HWSS G3 competency under Building Regs Part G3). On many London jobs — a new boiler feeding a new unvented cylinder, for example — all three qualifications are required simultaneously. Our senior engineer holds all three: Gas Safe registered, G3 certificate 136359 (issued 8 September 2025, expiry 18 August 2030), and WaterSafe registered certificate 136356 (same period).
Every gas job we do is delivered under Gas Safe registration. Certificate supplied with every invoice. Landlord Gas Safety Records emailed within 24 hours of the visit. Boiler manufacturer warranty preserved via accredited-installer scheme registration on Worcester Bosch (8-year), Vaillant (10-year), Ideal (10-year on Logic Max). Public liability £5,000,000 via SiriusPoint through Eaton Gate MGU, policy BE26ACTT000000018221, period 07/05/2026 to 06/05/2027. 24/7 emergency dispatch across every London borough.
Six reasons Gas Safe registration is not optional
It is a statutory legal requirement
Gas Safe is the UK's official register for gas engineers. Since 2009 it has been illegal to carry out gas work in the UK without Gas Safe registration — this covers boiler installation, boiler repair, boiler service, hob installation, gas fire work, and Landlord Gas Safety Records (CP12). Work done by an unregistered engineer is a criminal offence, voids property insurance, and can invalidate boiler manufacturer warranties.
Property insurance depends on it
Every mainstream UK household insurance policy requires that gas work be done by a Gas Safe registered engineer. A claim following a gas-related incident (fire, boiler failure, carbon monoxide) can be refused if the last gas work on the property was carried out by an unregistered person. Landlord insurance and building insurance have the same requirement.
Landlord licensing depends on it
Every HMO licence and every landlord letting agreement requires an annual Gas Safety Record (CP12) issued by a Gas Safe registered engineer. Local authority licensing teams inspect for CP12 records at renewal; missing or outdated records can trigger licence conditions, fines, or licence revocation. Property must have a current CP12 before every new tenancy.
Boiler manufacturer warranty depends on it
Every mainstream boiler manufacturer (Worcester Bosch, Vaillant, Ideal, Baxi, Viessmann, Alpha) makes the standard warranty conditional on installation and annual service by a Gas Safe registered engineer. Warranty claims for premature boiler failure are refused where the install or service records show an unregistered fitter.
ID card verification is your right
Every Gas Safe registered engineer carries a photo ID card with their registration number and expiry date. You are entitled to ask to see it before any gas work begins — a genuine Gas Safe engineer will produce it without hesitation. You can verify the number in real time at gassaferegister.co.uk. If an engineer is reluctant or unable to produce the card, do not let them touch any gas fitting.
It sits alongside G3 and WaterSafe — not instead of
Gas Safe covers gas. HWSS G3 covers unvented hot water cylinders. Water Regulations 1999 competency (WaterSafe) covers water supply. Each qualification covers a different scope of work. On a typical London job that involves a new boiler feeding an unvented cylinder, all three qualifications are required. Our senior engineer holds all three — Gas Safe registered, G3 certificate 136359, WaterSafe registered (certificate 136356).
Gas Safe work we deliver — with typical costs
| Job | Description | Typical cost (inc. VAT) |
|---|---|---|
| Combi boiler replacement | Like-for-like combi replacement across all major brands. Full survey, Building Regs notification (Benchmark), commissioning report, Gas Safe registration on the job. Landlord Gas Safety Record issued. | £2,100–£3,650 |
| Combi to system boiler + cylinder upgrade | Convert existing combi to a system boiler feeding a new unvented cylinder — mains-pressure hot water at every outlet. Gas Safe on boiler side, G3 on cylinder side. Building Notice submitted. | £4,650–£6,850 |
| Annual boiler service | Standard combi or system boiler service — flue gas analysis, gas rate check, water pressure verification, condensate trap check, error log review. Service report and warranty renewal. | £120–£165 |
| Landlord Gas Safety Record (CP12) | Statutory annual gas safety inspection for HMOs and private lets. Boiler, hob, cooker, gas fire — every fixed gas appliance tested. CP12 certificate emailed within 24 hours. | £75–£95 (standalone) / £160–£220 (combined with boiler service) |
| Emergency boiler repair | Same-day dispatch for no hot water, no heating, boiler lockout, pressure drop, error codes. Diagnosis on arrival, parts quoted before repair, warranty on labour and parts. | £130 first hour + parts |
| Hob and gas fire installation | Gas hob install (single or dual fuel), gas fire replacement, gas cooker connection. Gas Safe registration and Building Regs notification supplied. | £195–£420 install labour + fittings |
Boiler brands we install and service
Worcester Bosch
Market-leading brand for reliability and warranty. Standard 8-year warranty on new installs when fitted by a Gas Safe accredited installer. We are an accredited fitter — extended warranty applies.
Vaillant
German engineering, strong quiet-running credentials, favourite in period London properties where noise matters. Vaillant Advance Installer scheme — 10-year warranty on eligible installs.
Ideal
Excellent value with strong spare-parts backing. Popular choice for landlord portfolios and rental property replacements. 10-year warranty on Logic Max range.
Baxi
Reliable long-established brand with a broad range from budget combis to premium hydrogen-blend-ready models. Widely supported by London parts distributors.
Viessmann
Premium German brand for high-end installs. Best-in-class efficiency ratings. Specified frequently on high-value refurbishment projects.
Alpha
Value-focused UK brand, popular for compact-format installs and buy-to-let landlord replacements. Straightforward to service, good spare-parts availability.
Gas Safe plumber across every London borough
Frequently asked questions about Gas Safe registration and gas work
What is Gas Safe registration and why does it matter?
How do I verify a Gas Safe registration number?
What is a Landlord Gas Safety Record (CP12) and who needs one?
Does my boiler manufacturer warranty depend on Gas Safe registration?
Can I do gas work myself as a homeowner?
What is the difference between Gas Safe and CORGI?
What other qualifications do you hold?
Do you handle emergency gas leaks?
How much does an annual boiler service cost?
Do you carry public liability insurance?
Related services
North London Plumber
Gas Safe boiler work across Barnet, Enfield, Haringey, Camden, Islington.
Hot water cylinders — G3
Unvented cylinder installs sitting alongside boiler upgrades.
Leak detection — main hub
Non-destructive leak location, insurance-format reports.
Boiler repairs — service overview
Standard boiler service and repair service page.
Book a Gas Safe engineer
Statutory Gas Safe registration on every job. 24/7 emergency dispatch across all 32 London boroughs.
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