Written by Mark Reid,
Trades Editor
Rankings are based on review rating and review count from public business listings, with a small lift given to businesses that show a working website and phone number. We check each business's homepage to confirm heating engineering is what they primarily do, which keeps unrelated trades off the page. Listings flagged as permanently closed are removed automatically. Businesses marked Trust Verified have gone through our full verification process, covering trade qualifications and accreditations, public liability insurance, trading history, customer review history and registered company information, detailed on our How We Verify page. Other businesses here haven't been independently verified by us and inclusion isn't an endorsement, so do your own checks before hiring.
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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 →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 →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 →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 →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 →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 →Rated 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 →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 →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 →Landlords and letting agents across SW16 rely on James Winney Heating and Gas for boiler repairs, servicing and gas safety certificates needed to keep rental properties compliant. The London firm has built a record of 101 reviews rating it 5 out of 5, reflecting consistency valued by those managing multiple tenancies rather than a single household.
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.
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Add Your BusinessA 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 →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 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 →Hitgas Ltd is a heating engineering firm based in North London, serving residential and commercial customers across the capital. Operating from the N3 area, the company covers boiler installation, servicing, and general heating system work. It offers a practical local option for households and businesses seeking a straightforward, no-frills approach to gas and heating maintenance.
Read more →Polkadot Plumbers Ltd is a heating engineering firm serving the SW1V area of London. The company covers boiler installation, servicing, and central heating work for residential and commercial customers. With a postcode placing it firmly in central London, it is well positioned to reach properties across the surrounding neighbourhoods.
Read more →Pleasant Plumbers Limited is a London-based heating engineering firm operating in and around the EC3V area of the City. The company covers boiler installation, servicing, and general heating maintenance for residential and commercial properties. Its central London location makes it a practical option for businesses and households in the Square Mile and surrounding neighbourhoods.
Read more →A 4.6 rating from 152 reviews points to consistent standards at Logical Heating & Plumbing Solutions, a heating engineering firm based in south London. The company covers boiler and central heating work for households across the SE20 area, with feedback suggesting reliability across repeat callouts rather than one-off jobs.
Read more →Heating engineers serving the SE26 area of London, Boiler Bunny Heating covers boiler repairs, servicing and installations for local households. The firm has built a strong local reputation, reflected in a 4.9 rating from 80 reviews. Work is carried out with attention to gas safety standards expected of domestic heating systems.
Read more →Rated 4.9 out of 5, Fastfix London Ltd has built a consistent record among its customers in and around the EN10 7PG area. The company covers heating engineering work across London, from boiler repairs to central heating installations. That rating, maintained across a notable volume of reviews, points to reliable workmanship rather than the occasional fortunate job.
Read more →Families across South Croydon rely on South City Heating for boiler repairs and servicing, particularly when systems fail during colder months. The firm has built a reputation among local households for turning up promptly and explaining faults in plain terms. With a 4.9 rating from 78 reviews, it remains a familiar name for residents in the CR0 area needing dependable heating support.
Read more →JF Heating operates as a heating engineering service based in London's SM5 area, covering boiler installation, servicing and repair work. The firm has built a strong local reputation, reflected in a five-star average across 64 Google reviews. Enquiries can be made directly through the company's website for scheduling or further details.
Read more →Landlords and letting agents managing properties around Croydon call on Aryan Heating & Electrics Ltd for boiler repairs, servicing and electrical fault-finding that need scheduling around tenants. The firm handles landlord safety certificates and routine maintenance across rental portfolios, work reflected in a 4.7 rating from 107 reviews on Google.
Read more →Heating installation and repair is the core focus of R G Austin Ltd, a long-established firm serving south-east London. Operating from the SE3 area, the company covers domestic heating systems for local households. With a straightforward, trade-focused approach, it offers a reliable point of contact for boiler and central heating work without the overhead of a larger contractor.
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