Written by Mark Reid,
Trades Editor
Our ranking is driven by public review rating and review count from third-party business listings, with a small lift for businesses that show a working website and phone number. We read each business's homepage to confirm heating engineers work is what they primarily offer. Listings flagged as permanently closed are removed automatically. Businesses marked Trust Verified have additionally passed our full verification covering qualifications, insurance, trading history, customer review history and registered company information, as set out on our How We Verify page. Other businesses on this page have not been independently verified by us, and inclusion is not an endorsement. Always do your own checks before hiring.
Our Top Picks
Lambert Heating & Renewables Ltd is an independent heating company based in Carshalton, Surrey, serving Carshalton, Sutton, Wallington, Cheam, Banstead, Purley, Croydon and surrounding areas of Surrey and South London. Services include boiler servicing, boiler repairs, boiler fault diagnosis, boiler installation, heating system upgrades, radiator upgrades, heat pump installation, heat pump servicing, heat pump diagnostics, low-temperature heating design, underfloor heating integration, heating controls, system balancing, commissioning and heating system optimisation. Terry Lambert is Gas Safe registered, F-Gas qualified, Heat Geek Elite trained, a Which? Trusted Trader and a member of the Guild of Master Heating Engineers. ✅ Which? Trusted Trader ✅ Heat Geek Elite trained ✅ Gas Safe Registered ✅ F-Gas Qualified ✅ Guild of Master Heating Engineers ✅ Viessmann Accredited ✅ Vaillant Advance ✅ Worcester Bosch Trained ✅ Ideal Connect ✅ Glow-worm Club Energy ✅ Intergas Platinum ✅ Baxi Works MANUFACTURER TRAINING AND ACCREDITATION Lambert Heating & Renewables works with major boiler, heating and heat pump manufacturers. Manufacturer training, accreditation and installer scheme membership includes: ✅ Viessmann ✅ Vaillant ✅ Worcester Bosch ✅ Ideal ✅ Glow-worm ✅ Intergas ✅ Baxi Manufacturer training supports correct servicing, diagnosis, controls setup, commissioning and product-specific fault finding. Selected boilers and heating products may also qualify for extended manufacturer guarantees or warranties, depending on the manufacturer, product, installer scheme and current registration requirements. BOILER SERVICING IN CARSHALTON Boiler servicing in Carshalton from £95 + VAT. Lambert Heating & Renewables provides annual boiler servicing in Carshalton, Sutton, Wallington, Cheam and surrounding areas. Boiler servicing is carried out according to the appliance condition, age, manufacturer requirements and system setup. A boiler service can include: ✅ Boiler safety inspection ✅ Combustion analysis ✅ Flue gas analysis ✅ Flue integrity checks ✅ Burner inspection ✅ Heat exchanger inspection ✅ Ignition checks ✅ Flame detection checks ✅ Gas pressure checks ✅ Gas rate checks ✅ Boiler operating pressure checks ✅ Condensate trap checks ✅ Condensate discharge checks ✅ Safety device checks ✅ Expansion vessel checks ✅ Pressure relief valve checks ✅ Heating controls checks ✅ Thermostat checks ✅ Programmer checks ✅ Weather compensation checks ✅ System pressure checks ✅ Heating circulation checks ✅ Radiator performance checks ✅ Magnetic filter inspection and cleaning where fitted ✅ Heating system water quality checks ✅ Inhibitor checks where appropriate ✅ Conductivity testing where appropriate ✅ VDI 2035 water quality assessment where appropriate ✅ Visual checks for leaks, corrosion and deterioration ✅ Manufacturer service requirements followed where applicable ✅ Benchmark or service record updated where applicable ✅ Boiler fault codes reviewed where available ✅ Operating history reviewed where available ✅ Advice on deterioration or faults identified during servicing Manufacturer-trained boiler servicing is available across brands including Viessmann, Vaillant, Worcester Bosch, Ideal, Glow-worm, Intergas and Baxi. ONGOING BOILER CARE Lambert Heating & Renewables provides ongoing boiler care and support for existing customers. Customers who remain with Lambert Heating & Renewables for servicing and maintenance benefit from continuity of care and an engineer who becomes familiar with the history of the boiler and heating system. Ongoing care can include: ✅ Annual boiler service reminders ✅ Telephone support ✅ Video-call support where useful ✅ 7-day support for existing customers ✅ Early-morning appointments where available ✅ Evening appointments where available ✅ Weekend appointments where available ✅ Ongoing service history ✅ Advice on boiler controls ✅ Advice on heating operation ✅ Support with manufacturer guarantee
Read more →A boiler on the blink or a heating bill that keeps climbing usually brings people to Efficient Home Energy, based in Bromley. Work typically starts with a diagnostic visit before repairs, servicing or a full system replacement are discussed. The firm has built up 796 Google reviews with a 4.8 average, suggesting consistent follow-through on quotes given.
Read more →Heating engineers covering Sutton and the surrounding area, Rowlen Boiler Services Ltd handles boiler installation, servicing, and repair for residential properties. The company operates from SM3, placing it well for call-outs across the borough. No rating is listed, but the firm has built a steady local presence in a trade where reliability and response time matter most.
Read more →Heating installation and repair is the core work at H.E.H Ltd, a Romford-based engineering firm serving residential and commercial clients across the RM7 area. The company handles gas and central heating systems, covering everything from boiler servicing to full system replacement. Straightforward in scope and locally rooted, it offers a practical option for householders and businesses seeking reliable heating work without the overhead of larger contractors.
Read more →Heating installations, boiler servicing, and plumbing repairs are the core work at Jennings Plumbing and Heating Ltd, a London-based contractor covering residential and commercial properties across the capital. The company operates from the SW1E postcode, placing it within easy reach of central London and its immediate neighbours. Work is carried out to industry-standard specifications, with no subcontracting implied by the trading name.
Read more →Boiler repairs and central heating installations are the core work at Smart Home Rescue LTD, a heating engineer based in the SW6 area of London. The company covers residential properties across the capital, handling both emergency callouts and planned maintenance. Its local focus means response times tend to be prompt for clients in and around Fulham.
Read more →Heating engineers covering Romford and the surrounding Essex area, The Boiler Replacement Company (Essex) Ltd focuses on boiler replacement work for domestic properties. The postcode RM14 2UQ places them on the eastern edge of the borough, giving good reach into the outer Essex commuter belt. Their site at boilerreplacement.net outlines the scope of work they cover.
Read more →Older terraced housing and converted flats around Erith and the wider DA8 area make up much of the workload for Emergency Plumber 365, where ageing boilers and outdated heating systems are common. The firm handles breakdowns and repairs on this type of housing stock, with 215 reviews averaging 4.9 pointing to consistent results on jobs that require a working knowledge of older installations.
Read more →Heating engineers covering London, Green Gas London Ltd handle gas and central heating work across the capital. The company operates from N16, placing it well for north and east London neighbourhoods. No rating is listed, but the business maintains a dedicated web presence at greengaslondon.co.uk for enquiries and service information.
Read more →Rated 4.8 from 254 Google reviews, Will I Am Plumbing and Heating Limited has built a consistent record among heating engineers serving east London. The company covers plumbing and heating work from its E2 base, giving it a focused presence in the area. That volume of reviews points to a steady local clientele rather than occasional trade.
Read more →A boiler that won't fire up on a cold morning, or a landlord needing a gas safety certificate before new tenants move in, are typical reasons Londoners call Harvard Heating Services. The firm handles installations, servicing and repairs, and has built up a strong reputation locally, reflected in 4.9 from 162 reviews on Google.
Read more →Heating engineers covering Sutton and the SM2 postcode, Smith & Byford handle boiler repairs, servicing and installations for local households. Over a thousand Google reviews put them at 4.1, a reflection of steady, consistent work rather than one-off jobs. Details of coverage and booking are available through their website.
Read more →Get listed and reach customers actively searching for your services in this area.
Add Your BusinessRated 5 stars by its London customers, Hydro Install Ltd has built a consistent record in domestic and commercial heating engineering. The company operates across the capital, covering boiler installation, servicing, and system maintenance. SW18 2AQ serves as its base, placing it well for work throughout south-west London and the surrounding boroughs.
Read more →Boiler installation, underfloor heating, and gas leak detection and repair are among the core services offered by James Winney Heating and Gas, based in SW16. The company also carries out landlord gas safety certificates and power flushing across London. A 5-star rating from over 100 Google reviews points to consistent work across its range.
Read more →Rated 4.9 stars across verified reviews, Browns Heating Services Ltd has built a consistent record in the Romford area. The company covers domestic heating installation, servicing, and repair work, with the IG8 8JL postcode placing it well for clients across the eastern London fringe. Straightforward pricing and punctual call-outs appear frequently in customer feedback.
Read more →Boiler installations, servicing, and gas safety work form the core of Gasworks London Limited's offer, covering residential properties across the capital. Based in W3, the company handles central heating repairs alongside landlord certificates and compliance checks. A practical choice for west London householders and property managers needing reliable gas engineering without a national contractor's overheads.
Read more →Rated 4.9 out of 5, AZ Plumbing Contractors Limited has built a consistent record among heating engineers serving London. The company operates from the N1 postcode, placing it well for central and north London properties. It covers the full range of heating work expected of a specialist contractor.
Read more →A perfect 5-star average across 95 reviews sets Heat in London ltd apart among heating engineers serving the capital. The firm covers boiler repairs, servicing and installations, with customer feedback consistently pointing to reliable diagnosis and tidy workmanship. That volume of consistent ratings suggests a settled client base built through repeat call-outs rather than one-off jobs.
Read more →Heating engineers based in London, Glowarm covers boiler repairs, servicing and installations across the local area. The firm has built up a solid track record, reflected in a 4.7 rating from 190 reviews. Work is carried out on both domestic systems and general heating maintenance for households nearby.
Read more →A boiler that won't hold pressure, or a cold radiator upstairs while the rest of the house is warm, are the kind of calls Asset Plumbing & Heating Ltd takes on regularly in Sutton. The firm handles diagnosis and repair as well as full system installs, and its 4.9 rating from 119 reviews reflects consistency across that range of work.
Read more →Rated 4.9 out of 5 by customers across London, Best Gas London Ltd offers heating engineering services from its East London base. The company covers gas installations, boiler work, and associated heating systems for residential properties. Its postcode, E1 5DB, places it well for clients in and around the East End.
Read more →Heating installation, servicing, and repair work for residential properties in Bromley is the core focus of Allen & Co Plumbing and Heating Services Ltd. The company covers boiler work alongside broader plumbing jobs, offering a practical combination under one contractor. DA5 1PT places them at the edge of the borough, within reach of neighbouring areas in south-east London and north-west Kent.
Read more →Bromley households needing boiler repairs or servicing can call on Gas Ray, a heating engineer covering the SE9 4DD area. The firm has built a reputation among local residents, reflected in a five-star average across 90 Google reviews. Work spans installations, servicing and breakdown callouts for domestic gas systems.
Read more →Plumbing and central heating work in Bromley is handled by Elliotts, covering boiler installations, repairs and general heating maintenance across the BR2 area. The firm has built up a record of 87 reviews on Google, all rated five stars, reflecting consistency in the work carried out for local households.
Read more →Heating engineers covering London, Cosy Cat Plumbing & Heating Ltd works on boiler installations, servicing and general plumbing repairs. The company has built up a run of 87 reviews on Google, holding a full 5-star average. Jobs range from routine maintenance to fixing heating faults across the capital.
Read more →Get listed and reach customers actively searching for your services in this area.
Add Your Business
