A new boiler is a major job and a long-term decision — the right type and size, fitted and commissioned properly, is the difference between a system that quietly works for years and one that never quite does. Every engineer listed here for boiler installation in Kensington & Chelsea is checked and verified before going live.

✅ Checked before listing — identity, insurance, trading presence, and Gas Safe registration. How we verify →
✅ Workmanship guarantee badges on listings — 1, 3, 6 or 12 months

⚠️ If you smell gas or suspect a leak: don’t touch any electrical switch (on or off), put out naked flames and don’t smoke, open doors and windows, and turn the gas off at the meter control valve (unless the meter is in a cellar or basement). Then leave the property and, from outside, call the National Gas Emergency Service on 0800 111 999 — and don’t go back in until you’re told it’s safe. The same number covers suspected carbon monoxide. Full safety guidance, gas competency and landlord duties ↓

Find a verified boiler engineer in Kensington & Chelsea ↓

Coverage: W8, W10, W11, W14, SW3, SW5, SW7, SW10, plus the SW1W/SW1X, W2 and NW10 edges that clip the borough.
What this covers: supplying and installing new and replacement gas boilers — combi, system and heat-only — including sizing, controls, flue, system cleaning and commissioning.
Routing: a faulty existing boiler → Boiler Repair; the annual service → Boiler Servicing; radiators and wider system upgrades → Central Heating Repair; thinking of a heat pump instead → see the grant note below.
Costs: prices depend on the boiler and the work — see what affects the price.
Availability: each engineer sets their own hours and lead times, shown on their listing.

Jump to: Choosing & fitting · In Kensington & Chelsea · Safety first · By district · Costs · FAQs

Choosing and fitting a new boiler — what’s involved

Which type? A combi makes hot water on demand with no cylinder, which suits smaller homes and flats; a system boiler with a cylinder copes better where several taps or bathrooms run at once; a heat-only (regular) boiler with a tank and cylinder is still common in larger period homes. Sizing matters as much as type — an oversized boiler wastes fuel, an undersized one leaves you short. A proper recommendation comes from a survey, not a guess: the engineer should check the mains flow rate, your hot-water demand and number of bathrooms, the gas supply size, the existing controls, the radiator and system condition, and the flue and condensate route. Our combi vs system boiler guide walks through the trade-offs.

What the rules require. In England, Boiler Plus means a new domestic gas boiler must be at least 92% ErP efficient and fitted with time and temperature controls, and a new combi boiler must also include one additional efficiency measure — flue gas heat recovery, weather compensation, load compensation, or a smart control with automation and optimisation.¹

The install done right. On a replacement, the system needs to be clean for the new boiler’s warranty — flushing or power-flushing may be needed depending on its condition — and a magnetic filter keeps sludge out afterwards. Condensate needs a reliable route with the right fall; in flats, lightwells or lower-ground homes that can mean insulating the pipe against freezing, rerouting it, or fitting a condensate pump. The flue position is checked for clearances, plume nuisance and access, alongside any freeholder, managing-agent or heritage constraints. Commissioning then covers the gas rate and combustion analysis, the safety checks, the controls setup and handover.

Certificate and warranty. Gas work on a boiler must by law be carried out by a Gas Safe registered engineer.² The installer self-certifies that the installation meets the Building Regulations and notifies it, after which a Building Regulations Compliance Certificate is issued for the property.³ They also complete the Benchmark commissioning checklist, which most manufacturers require to validate the boiler’s warranty — and annual servicing, a clean system, filter maintenance and registering the boiler with the manufacturer keep that warranty in force.

Thinking of a heat pump instead? If you’re weighing a heat pump rather than another gas boiler, the Boiler Upgrade Scheme can help with the switch — it’s a grant for replacing fossil-fuel heating with low-carbon heat, not for a new gas boiler. Through an MCS-certified installer in England and Wales, Ofgem’s scheme offers £7,500 towards an air-to-water heat pump (the common type), £7,500 towards a ground source heat pump (including water source), £2,500 towards an air-to-air heat pump, or £5,000 towards a biomass boiler; eligibility rules apply and amounts can change, so check Ofgem for the current position.⁴

Boiler installation in Kensington & Chelsea: flats, flues, heritage and heat networks

Is a gas boiler even the system here? Not always. RBKC runs a number of communal heat networks across the borough — serving over a hundred buildings and several thousand homes,⁵ so a flat on a network has a heat-interface unit rather than an individual gas boiler, and there’s no boiler to replace. Worth confirming which you have before planning anything.

Flues and flats. Flue routing and terminal position through a period façade or a lightwell shape a flat or mansion-block install, and party-wall and neighbour considerations come into play. RBKC notes that in a listed building the whole building is protected, including the interior,⁶ so a flue terminal or visible pipe run on a protected building — or on a conservation-area frontage, where external appearance is controlled — needs checking, and in a mansion block the freeholder or managing agent may need to agree it.

Hard water. With Thames Water’s region-wide hard water,⁷ a clean system, a magnetic filter and a scale-reducing measure are worth building into a new install to protect it.

Renting? A landlord who provides the boiler must keep it in safe condition and arrange an annual gas safety check by a Gas Safe registered engineer, with the Landlord Gas Safety Record given to tenants within 28 days,⁸ and the HSE says that record must be kept for two years.⁹ Council tenants should report heating problems to RBKC Housing Management on 0800 137 111.¹⁰

Getting to you. The whole borough is inside the London ULEZ,¹¹ and RBKC says there’s no uncontrolled parking anywhere in the borough.¹²

Safety first

If you smell gas or suspect a leak. Don’t touch any electrical switch on or off, put out any naked flames and don’t smoke, open doors and windows, and turn the gas off at the meter control valve (unless the meter is in a cellar or basement). Leave the property and call the National Gas Emergency Service on 0800 111 999 from outside, and don’t return until you’re told it’s safe.¹³

Carbon monoxide. The same number covers suspected carbon monoxide. The HSE warns that CO is colourless, odourless and tasteless, that any poorly-burning combustion appliance can produce it, and that warning signs include lazy yellow or orange flames instead of crisp blue, soot or staining around the appliance, a pilot light that keeps going out, and excess condensation.¹⁴ For non-emergency advice the HSE gas safety line is 0800 300 363.

Only a Gas Safe engineer. A gas boiler must by law be installed by a Gas Safe registered engineer, who self-certifies the work to the Building Regulations. Ask to see their Gas Safe ID card, and check them on the Gas Safe Register.

Carbon monoxide alarms. Installing a new boiler triggers the alarm requirement directly: Building Regulations Part J (Approved Document J) require a carbon monoxide alarm to be provided when a new or replacement fixed combustion appliance, such as a gas boiler, is installed in a dwelling — a requirement that applies regardless of tenure, owner-occupied homes included.¹⁵ In rented homes there is also a continuing duty: the Smoke and Carbon Monoxide Alarm (England) Regulations 2015, as amended from 1 October 2022, require a carbon monoxide alarm in any room used as living accommodation with a fixed combustion appliance, excluding gas cookers.¹⁶ Government guidance points to alarms meeting BS EN 50291, fitted per the manufacturer’s instructions.

Find a verified boiler engineer by district

What boiler installs tend to look like across the borough’s main areas:

• Chelsea & World’s End (SW3, SW10): combi swaps in refurbished King’s Road flats, where flue routing through a period façade and managing-agent consent shape the job; some World’s End and Cremorne estate homes are on communal heating, so there’s no individual boiler to replace.
• Kensington & Holland Park (W8, W14 edge): large period houses where a system or heat-only boiler with a cylinder often suits several bathrooms, and flue and pipe runs on a protected building need care.
• Notting Hill & Ladbroke Grove (W11, W10): converted flats where a combi suits the space, but flue terminals on a conservation-area frontage and shared risers need agreement.
• North Kensington & Notting Dale (W10): estate and converted flats where some homes are on a communal heat network and council homes route through RBKC.
• South Kensington & Earl’s Court (SW7, SW5): mansion-block flats where boiler position, flue routing and a thorough system clean protect a new install in older pipework.
• Brompton (SW3, SW7): mansion flats where hard water makes a scale-reducing measure and a magnetic filter worthwhile on a new boiler.

What it costs

There’s no official price list for boiler installation, and we don’t publish invented “average” rates. What’s honest is to set out what drives the cost.

These are general cost factors, not regulated rates, not market data and not a published cost survey. Get the boiler model, the controls, the additional efficiency measure and whether a system clean is included named on the quote — our How to Read a Plumbing Quote guide and combi vs system boiler guide explain what to weigh up.

Frequently asked questions

Why verified plumbers — not a general directory

A new boiler is a big spend and a gas job in one — and a poor install can void the warranty, fail the Building Regulations, or be unsafe. Gas work has to be done by a Gas Safe registered engineer who self-certifies it. That’s why every engineer listed here is checked before going live and re-verified, rather than simply accepted.

We confirm the business is legitimately trading and verify the named contact, we check evidence of public liability insurance, we confirm Gas Safe registration directly with the Gas Safe Register, we review feedback and reputation from around the web, and we confirm they cover Kensington & Chelsea’s W8, W10, W11, W14, SW3, SW5, SW7 and SW10 postcodes before a profile is approved. You can also check any engineer yourself on the Gas Safe Register and ask to see their ID card on the doorstep.

Profiles may be suspended or removed if credentials lapse or credible concerns are raised — see the full verification process →. And there’s no customer middleman fee: enquiries go directly to the engineer.

Related areas

Verified plumbers across Kensington & Chelsea’s neighbourhoods, including:

• Brompton
• Chelsea
• Earl’s Court
• Holland Park
• Kensington
• Ladbroke Grove
• North Kensington
• Notting Hill
• South Kensington
• World’s End

Related services

Other verified plumbing services in Kensington & Chelsea:

• Emergency Plumber in Kensington & Chelsea
• Burst Pipes in Kensington & Chelsea
• Leak Detection in Kensington & Chelsea
• Blocked Drains in Kensington & Chelsea
• Toilet Repairs in Kensington & Chelsea
• Tap Repair & Installation in Kensington & Chelsea
• General Plumbing in Kensington & Chelsea
• Bathroom Plumbing in Kensington & Chelsea
• Kitchen Plumbing in Kensington & Chelsea
• Washing Machine & Dishwasher Installation in Kensington & Chelsea
• Boiler Repair in Kensington & Chelsea
• Boiler Servicing in Kensington & Chelsea
• Central Heating Repair in Kensington & Chelsea
• Commercial Plumbing in Kensington & Chelsea

Related guides

• Combi vs System Boiler — UK Guide
• Boiler Repair or Replace? — A London Guide
• London Hard Water — Homeowner & Landlord Guide
• London Plumbing Costs & Compliance Guide 2026

A new boiler should be a once-in-a-decade decision you don’t have to think about again — which means getting the type, the size, the controls and the commissioning right, by someone qualified to certify it. Use the verified listings above to find a checked, Gas Safe registered engineer for boiler installation in Kensington & Chelsea.

Find a verified boiler engineer in Kensington & Chelsea ↑

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Last reviewed: June 2026 by Adiel Khan — SFEDI-accredited business advisor, 20+ years’ experience (South East Enterprise Ltd) and operator of VerifiedPlumbers. LinkedIn ↗

This page is checked for compliance and regulatory accuracy against the bodies cited on it (Gas Safe Register, HSE, National Gas, GOV.UK Building Regulations, Ofgem, legislation.gov.uk, Thames Water, RBKC and TfL). Source links are provided within this page where relevant.

Sources & further reading

1. GOV.UK — Boiler Plus factsheet (new domestic gas boilers in England must be at least 92% ErP with time and temperature controls; a new combi needs one additional efficiency measure)
2. Gas Safe Register (gas work must, by law, be carried out by a Gas Safe registered engineer)
3. Gas Safe Register — Notification of gas work (consumer factsheet) (a registered business self-certifies compliance with the Building Regulations and notifies the local authority; a Building Regulations Compliance Certificate is issued)
4. Ofgem — Boiler Upgrade Scheme (property owners) (£7,500 air-to-water heat pump; £7,500 ground source, including water source; £2,500 air-to-air heat pump; £5,000 biomass boiler; MCS-certified installer; England and Wales)
5. RBKC — Heat networks (communal heat networks serve many buildings and homes in the borough)
6. RBKC — Listed buildings explained (whole-building protection, including the interior)
7. Thames Water — Hard water (region-wide hard water)
8. Gas Safe Register — Landlord gas safety responsibilities (annual gas safety check on landlord-provided appliances and flues; Landlord Gas Safety Record to tenants within 28 days)
9. HSE — Gas safety for landlords and letting agents (record kept for two years; copy to new tenants before they move in)
10. RBKC — Housing repairs (Housing Management 0800 137 111)
11. Transport for London — Ultra Low Emission Zone (all London boroughs; £12.50 daily charge)
12. RBKC — Guide to parking (no uncontrolled parking areas in the borough)
13. National Gas — Emergency contacts (0800 111 999; gas-emergency steps including turning off at the meter)
14. HSE — Carbon monoxide awareness (CO colourless and odourless; danger signs and symptoms; advice line 0800 300 363)
15. GOV.UK — Approved Document J (Combustion appliances and fuel storage systems) (Requirement J3; a CO alarm should be provided when a new or replacement fixed combustion appliance, excluding gas cookers, is installed in a dwelling — tenure-neutral; in force 1 October 2022)
16. The Smoke and Carbon Monoxide Alarm (Amendment) Regulations 2022 (CO alarm required in any room used as living accommodation with a fixed combustion appliance, excluding gas cookers; in force 1 October 2022)