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Water Heater Installation in London

New hot water where you need it: under-sink and point-of-use heaters, gas and electric multipoints, and immersion cylinders.

Get a fixed quote Or call 020 3674 8514
Cutaway of a house showing the stopcock, pipes, boiler, toilet, outside drain and gas meter Bathroom Kitchen Boiler cupboard GAS Stopcock: turn clockwise Lights off at the fuse box Check the pressure: 1–1.5 bar Don't flush again Stop running water 0800 111 999 first
No call-out feeNo night or weekend surchargeFixed price before we start12-month workmanship guarantee

Every hot water installation is sized to how you use water, fitted by our own engineers, and priced as a fixed quote after a free survey.

Water heater installation in London: what the price includes

  • 01
    Free survey, then a fixed quote

    We look at where the hot water is needed, how much you use and what supply is already there. Then you get one fixed price in writing, with everything in it. There is no charge for the survey and no obligation. The price does not change once we start, unless you ask for something extra.

  • 02
    The right type for the job

    A small under-sink heater suits a cloakroom, office kitchen or annexe. A multipoint can feed a sink and a basin together. A cylinder with an immersion suits a home that needs a lot of hot water at once. We explain the choice in plain terms and fit what suits you, not what is easiest for us.

  • 03
    Gas and electrics done properly

    Any gas water heater is fitted by a Gas Safe registered engineer, as the law requires. Electric heaters need the right supply and a proper isolator, and we check that before quoting rather than finding out on the day.

  • 04
    Safety and scale built in

    Hot water is set hot enough to be safe from bacteria, with a mixing valve where scalding is a risk, such as a child's bathroom. In hard-water London, we talk you through scale protection so the new heater lasts.

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.

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 a typical arrival time; ring and we will give you today's time for your street.

SloughAmershamRickmansworthFulhamKensingtonChelseaChiswickEalingHammersmithIslingtonCamdenClapham All London areas →

Water heater installation in London, your questions

How much does water heater installation cost?
It depends on the type of heater and what supply is already in place, so we do not guess over the phone. We survey for free and give you a fixed price in writing. That price is what you pay.
Can you install hot water where there is none now?
Usually, yes. A garden office, loft room or annexe can often have its own small water heater. We check the water, power or gas supply and the waste during the survey.
Do you remove the old water heater?
Yes. We disconnect it safely, drain it and take it away. The fixed quote says so in writing, so there is no extra charge on the day.
My water heater has stopped working. Do I need a new one?
Not always. Many faults are a cheap part, such as an element or a thermostat. See our water heater repair page first, and we will tell you honestly if replacing makes more sense.
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.

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

  • No call-out feeYou pay for the work, never the visit.
  • No night or weekend surcharge3am on a bank holiday costs the same as Tuesday lunchtime.
  • Fixed price before we startAgreed in writing on your doorstep. It does not move.
  • 12-month workmanship guaranteeIf our repair fails, we come back free.