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London Manchester
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Planned work · London · from £1,850 fitted

New Boiler Installation in London

A new boiler is sized from your radiators, bathrooms and mains flow, not from what's on the van.

Get a fixed quote Or call 020 3674 8514
New boiler installation in London
No call-out feeNo night or weekend surchargeFixed price before we start12-month workmanship guarantee

Gas Safe installation, manufacturer warranty registered for you, and the system flushed so the new boiler doesn't inherit the old one's sludge.

What you get

New boiler installation in London: what the price includes

  • 01
    Proper sizing survey

    Heat loss, hot water demand and mains flow measured, oversized boilers short-cycle and die young.

  • 02
    Major brands, real warranties

    Fitted to manufacturer spec so the 7–12 year warranties actually hold, and registered before we leave.

  • 03
    System cleanse included

    Flush and inhibitor with a magnetic filter fitted, the warranty small print demands it and so do we.

  • 04
    Old boiler handled

    Decommissioned, removed, and the paperwork (Building Regs notification, Benchmark) done properly.

What this means in London

Local conditions we work around

Hard water is the defining fact for London heating. At 280 to 320 ppm, scale builds on the hottest surface in the system, which is the boiler heat exchanger, and every millimetre of it costs efficiency and shortens the life of the unit. It is why we flush before commissioning a new boiler, why we fit a scale reducer on the mains where the system warrants it, and why an unvented cylinder in London needs its annual service rather more than the manual implies.

Where we do this in London

Covered across London

Same published rate card and the same twelve-month workmanship guarantee everywhere below, there is no postcode loading. Each area has its own page with an arrival time taken from our job records rather than chosen for a website.

Notting HillPutneyHackneyBatterseaBalhamRichmondTwickenhamWimbledonGreenwichLewishamCroydonBromley All London areas →
Straight answers

New boiler installation in London, your questions

What does a new boiler cost in London?
A like-for-like combi swap from £1,850 fitted. Conversions (regular-to-combi, relocations) run £2,800–£4,500. The quote is fixed after the survey and includes the flush, filter and paperwork.
Which brand should I choose?
The honest answer: the mainstream brands are closer than the forums admit, and the installation quality matters more than the badge. We fit what suits the budget and parts availability in your area, and say why.
How long does installation take?
A straight swap is one day. Conversions and relocations, two to three. Heating and hot water are back on the same evening in either case.
Is my old boiler worth repairing instead?
If the repair is under a third of replacement cost and the boiler is under ten years old, usually yes. We quote both when it's genuinely close and let the numbers decide.
How does London hard water affect heating work?
Considerably. Scale builds on the hottest surface in the system, which is the boiler heat exchanger, and every millimetre costs efficiency and life. It is why we flush before commissioning a new boiler here, why kettling is the most common noise complaint we get in London, and why an unvented cylinder in this city genuinely needs its annual service rather than nominally needing it.
24 hours · 365 days · London

Water where it
shouldn't be? Call.

A person answers, not a menu. You'll have an arrival time and a price range before you hang up.

020 3674 8514

Or WhatsApp 07865 292684, photos help us bring the right parts

Our engineers