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Gas Safe registered engineers for all makes: Worcester Bosch, Vaillant, Ideal, Baxi, Viessmann. Fault diagnosis to full repair.
Find an engineer →New combi, system and heat-only boilers. Supply and fit with full Gas Safe certification and manufacturer warranty registration.
Find an engineer →Full system installations, radiator additions, pipe repairs, power flushing to clear sludge from older London systems.
Find an engineer →Annual CP12 landlord gas safety certificates. Legally required every 12 months for rented properties. Fast turnaround available.
Find an engineer →24/7 gas leak response, no heating, boiler lockout. All engineers Gas Safe registered. If you smell gas, call 0800 111 999 first.
Find an engineer →Annual servicing to maintain efficiency and protect manufacturer warranty. Includes flue check, gas pressure test, and safety checks.
Find an engineer →| Job | Low estimate | High estimate |
|---|---|---|
| Boiler service | £80 | £150 |
| Gas safety check (CP12) | £70 | £130 |
| Boiler repair | £150 | £400 |
| New combi boiler (supply + fit) | £1,800 | £3,500 |
| Power flush | £300 | £600 |
| Radiator addition | £180 | £400 |
| Emergency call-out (out of hours) | £150 | £300 |
| Boiler replacement (system boiler) | £2,000 | £4,500 |
| Landlord gas safety certificate | £70 | £130 |
| Central heating installation (full system) | £3,000 | £7,000 |
Prices are estimates for London 2026. Actual costs vary by job complexity, boiler make, and location. Always get multiple quotes.
Describe the gas or heating work and your postcode. Under 2 minutes — no registration required to post.
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London's heating infrastructure is under constant strain. The capital's Victorian and Edwardian housing stock accounts for a large proportion of homes, with many still running on original or ageing central heating systems. Thames Water's exceptionally hard water supply accelerates limescale build-up inside boilers, reducing efficiency and increasing breakdown rates — making annual boiler servicing even more critical for London homeowners than elsewhere in the UK. A magnetic boiler filter (such as a Magnaclean) fitted to your system can significantly extend boiler life.
For landlords, the legal requirement to hold a valid Gas Safety Certificate (CP12) for every rented property in London is non-negotiable. Failure to provide tenants with a valid CP12 within 28 days of issue can result in fines of up to £6,000 and invalidate your landlord insurance. With London's high density of HMOs and buy-to-let properties, demand for annual gas safety checks is exceptionally high — particularly in autumn as the heating season begins.
When choosing a gas engineer in London, always verify their Gas Safe registration before work begins — it is a legal requirement for all gas work in the UK. Ask to see their Gas Safe ID card, which lists the appliances they are registered to work on. Only engineers who have completed the relevant ACS (Approved Competency Scheme) assessments should work on your boiler or gas supply. GetQuickHelp connects you with verified Gas Safe engineers across all London boroughs.
Free to post. No subscription. No hidden fees. Gas Safe registered engineers across all London boroughs — usually responding within hours.