London Gas Maintenance — Your premium gas service
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Warm homes,
beautifully heated.

New boilers, boiler repairs and servicing across North London, by Gas Safe registered engineers. Get an instant boiler quote in under a minute. No VAT charged.

Get an Instant Quote 07394 921069
  • Free, no-obligation quotes
  • No VAT charged
  • 9.83/10 on Checkatrade
  • 5.0 on Google
ILLUSTRATIVE IMAGEBUSHEY · WATFORD · HARROW · EDGWARE
300+Installations Completed
5.0★Google Rating
30Google Reviews
170Checkatrade Reviews

Boiler Specialists

Boilers, done properly

New boilers, repairs, servicing and the care that keeps them running. Tap any service for the details and prices.

Which boiler is right for you?

Tap a type to learn more, or answer a few quick questions for an instant quote.

We also look after

See all 13 services

OUR FULL RANGE

Find the right service for your home.

From a single repair to a complete installation. Choose a service below or call us to discuss the work.

01

Boilers & central heating

Boiler installation

Advice on the right boiler for your home, removal of the old unit, installation, testing and a handover of the controls.

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More details
  • We help you choose between combi, system and regular boilers, based on the size of your home, your hot water use and your current system.
  • Includes removing the old boiler, fitting the new one, connecting to your pipework, the flue where needed, commissioning, testing and a walkthrough of the controls and warranty registration.
  • Most installations are finished in a single working day.
  • Boiler installation from £1,945. See the boiler installation page ↗

Boiler repair

Fault finding for pressure loss, unusual noises and unreliable heating or hot water, with the repair explained before work starts.

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More details
  • Common faults we fix: pressure loss, ignition problems, faulty thermostats, diaphragm and heat exchanger issues.
  • We diagnose first, then explain the fault and the price before any repair starts.
  • We work on all major boiler brands.
  • Fault finding from £120. Repairs from £120 plus parts.

Central heating installation

A complete system planned around your property, including boiler selection, pipework, radiators, thermostats and commissioning.

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  • A complete system planned around your property: boiler, pipework, radiators, thermostats and commissioning.
  • A full installation usually takes two to three days, depending on the size of the property. We confirm the timing when we quote.
  • Installed by Gas Safe registered engineers, with certification on completion.

Heating system maintenance

Scheduled servicing for your boiler and heating system, with component checks, cleaning where needed and attention to developing faults.

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More details
  • We recommend servicing your boiler and heating system once a year.
  • A service visit usually takes 45 to 90 minutes.
  • For landlords, regular servicing supports your gas safety obligations.
  • Standard boiler service £120. Boiler service with gas safety certificate £170.
02

Plumbing & heating repairs

Hot water system repair

Investigation and repairs for cylinders, immersion heaters, pressure problems and combi-boiler components affecting your hot water.

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  • Heating but no hot water is often a faulty diverter valve on a combi boiler.
  • We repair cylinders, immersion heaters, pressure problems and combi-boiler components.
  • Unvented cylinder service £110.

Radiator repair

Help with cold spots, leaking valves and uneven warmth. Radiator repairs, bleeding and balancing to restore heat around your home.

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More details
  • A radiator that is cold at the bottom usually means sludge in the system. A powerflush can clear it (from £280).
  • Cold spots, leaking valves, bleeding and balancing across the whole house.
  • Most radiator repairs are done in a single visit.

Emergency heating repair

Help when your boiler stops or heating suddenly fails. Call to check the earliest appointment; same-day attendance is subject to availability.

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More details
  • Call as early as you can: we aim to attend heating emergencies the same day where possible.
  • If a part is not available straight away, we source it quickly and advise on temporary measures.
  • Emergency boiler repairs from £180.
03

Gas installation & safety

Gas pipe installation

New or replacement pipe runs for additional appliances, a relocated boiler or a kitchen extension, followed by testing.

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More details
  • Only Gas Safe registered engineers can legally install gas pipework.
  • Most domestic jobs take a single day. Larger projects may take longer, and we confirm the timing when we quote.
  • Covering Bushey, Watford, Harrow, Stanmore and Edgware.

Gas fire installation

Installation with the appropriate flue, ventilation and connection checks, followed by commissioning and an explanation of the controls.

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More details
  • A balanced-flue gas fire can be installed in a room without a chimney.
  • Most gas fire installations take a single day. New flues can take a little longer.
  • Every installation is certified on completion. Gas fire full strip-down service £200.

Gas appliance installation

Professional fitting and connection of gas appliances. Discuss your appliance and property requirements with the team before booking.

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More details
  • Only Gas Safe registered engineers can legally install gas appliances. Always check before anyone works on gas in your home.
  • Cookers and hobs are connected and safety-tested. The cost depends on the appliance and any pipework needed.
  • Gas hob and gas cooker installation from £160.

Gas line repair

Assessment and repair of damaged gas pipework by a Gas Safe registered engineer, with testing after the work is completed.

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More details
  • If you smell gas, leave the property, do not use any switches, and call the National Gas Emergency number on 0800 111 999. Once you are safe, call us.
  • We treat gas line calls as urgent and document every repair, which can help with an insurance claim.

Landlord gas safety certificates

Gas safety inspections for rental properties, with a record of the findings and advice on any repairs or follow-up work needed.

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More details
  • Landlords must renew the gas safety certificate (CP12) every 12 months.
  • In most cases the certificate is issued on the same visit as the inspection.
  • If an appliance is unsafe, we explain what is needed to make it safe.
  • CP12 £100 for up to 2 appliances, plus £30 per additional appliance.

See It Up Close

Heating Up Close

The details that keep a home warm: radiators, gas fires, boilers, smart controls and system care. Illustrative footage.

Central HeatingRadiatorsWarm, even heat in every room.
Gas FiresGas firesReal flame, installed and certified.
BoilersBoilersFitted neatly, tested and handed over.
Smart ControlsSmart thermostatsInstalled, set up and explained. From £160.
System CarePowerflushingClears sludge for hotter radiators. From £280.
Areas We CoverAcross North LondonBushey · Watford · Harrow · Radlett · Stanmore · Edgware

Services & Prices

Clear prices, a good place to start

Explore our service prices, then talk to us about your home.
No VAT is currently charged.

“From” prices are starting prices. We’ll confirm the work and final quote before you book. Parts are charged separately where stated below.

See full price list

Servicing & safety checks

Standard boiler service
£120
Full strip-down boiler servicePlus parts
From £200
Boiler service + gas safety certificate
£170
Gas safety certificate (CP12)Up to 2 appliances; £30 per additional appliance
£100
HIU serviceHeat interface unit
From £200
Gas fire full strip-down service
£200
Unvented cylinder service
£110

Repairs & system care

Boiler fault finding & diagnosis
From £120
Boiler repairsPlus parts
From £120
Emergency boiler repairs
From £180
HIU diagnosis & repairsUp to 2 hours of diagnosis/repairs; plus parts
From £220
Powerflushing
From £280
General plumbing repairs
From £120

Installations

Boiler installation
From £1,945
Gas hob installation
From £160
Gas cooker installation
From £160
Smart thermostat installation
From £160

Have a question about a price or the work you need?

Call 07394 921069 ↗

Our Work

Real boiler installs, before & after

Photos from our own boiler installations across North London. No stock images.

BeforeAfter

Out with the old, in with the new.

An old floor-standing boiler and cylinder taken out, and a new wall-hung boiler fitted in the same cupboard with neat, straight copper pipework.

New boiler with neat copper pipework
Boiler swap, before and after
Combi install with tidy pipe runs
Fitted, labelled and handed over
Magnetic filter fitted with the new boiler
Vaillant boiler installation

Reviews

What Our Customers Say About Us

9.83/10 Checkatrade · 170 reviews ↗5.0★ Google · 30 reviews ↗
10/10✓

Boiler refit & underfloor heating

“Romero from London Gas Maintenance came to refit our boiler, install underfloor heating and the manifold for it, as well as rezone our heating. The pipe work he has installed is almost artistic in how it’s been done.”

Verified Checkatrade review · WD23
10/10✓

Boiler installation

“Romero was very professional and polite in all manners. He thoroughly explained all the boiler and central heating information / instructions about operation needed. We would highly recommend London Gas Maintenance Ltd to all our friends and family.”

Verified Checkatrade review · EN1
5/5G

Google review

“Great service highly recommended!!”

Dennis Yentumi · Google
10/10✓

Boiler service

“I have used London Gas Maintenance Ltd for 15 years now to service my boiler – it was in fact they that had installed my new boiler. Romero is always polite and friendly and efficient in all the work that he carries out.”

Verified Checkatrade review · HA7
10/10✓

Restore hot water

“Same day repair. Thorough, courteous, helpful, friendly, no mess and we have hot water again!! Thank you – very happy to recommend!”

Verified Checkatrade review · WD23
10/10✓

Gas boiler servicing

“We needed a boiler servicing on a short notice and we are glad we found London Gas Maintenance! Romero did an excellent job and went above and beyond during his visit.”

Verified Checkatrade review · WD23
5/5G

Google review

“…quick, professional, efficient and friendly manner.”

Tunde Emmanuel · Google
10/10✓

Circulation pump

“Romero turned up on time as arranged… within a very short period of time the system was up and running with a replacement pump, all good.”

Verified Checkatrade review · WD23
10/10✓

Install hot water cylinder

“Awesome service, from a great professional who gave some great recommendations to improve our install. Highly recommended.”

Verified Checkatrade review · SE13
10/10✓

Excellent service

“Totally painless, customer service excellent, engineer excellent. Would definitely use this company again.”

Verified Checkatrade review · WD5
5/5G

Google review

“I was very pleased with the work…”

Maxine Reid · Google
10/10✓

Boiler

“Excellent services. Using them for 10 years for all our properties.”

Verified Checkatrade review · HA1
10/10✓

Leak on boiler

“Very good. Used many times. Always prompt and on time. Job completed as needed.”

Verified Checkatrade review · N2

Real reviews from Checkatrade and Google, shortened in places.

Good to Know

Your questions, clear answers

Have something else in mind?

Talk to the team ↗
Which areas do you cover?

Bushey, Watford, Harrow, Radlett, Stanmore and Edgware, plus nearby North London postcodes. Call to check your address.

Can you help with an urgent boiler problem?

We aim to attend heating emergencies on the same day where possible. Call early to check availability.

Is a quote free?

Yes. Quotes are free and carry no obligation to book. See our service prices for a starting point.

Do you charge VAT?

No VAT is currently charged on our services.

Are your engineers Gas Safe registered?

Yes, our engineers are Gas Safe registered. Ask for the attending engineer’s registration details before your appointment.

What work can I book?

Our services include boilers, central heating, hot water and radiator repairs, gas pipework, fires and appliances, emergency heating repairs and landlord gas safety certificates. Explore all services.

When can I contact you?

Monday to Friday, 8am–7pm; Saturday and Sunday, 8am–1pm. Call 07394 921069.

Warm homes. Beautifully heated.

Free, no-obligation quotes across Bushey, Watford, Harrow and North London. No VAT charged.

Call 07394 921069Request a Quote

Get in Touch

A warmer home, one conversation away

Tell us what you need. Get a free, no-obligation quote for your boiler, heating or gas work.

Call 07394 921069 ↗ WhatsApp us

Or email info@londongasmaintenance.co.uk

Request a free quote

We will get back to you during our opening hours. For anything urgent, please call 07394 921069. We only use your details to reply to your enquiry.

Your local team in North London.

Bushey · Watford · Harrow · Radlett · Edgware

MONDAY – FRIDAY8am – 7pm
SATURDAY – SUNDAY8am – 1pm
EMAILinfo@londongasmaintenance.co.uk

45 Cornfield Road
Bushey, WD23 3TD

Enlarged photo of a London Gas Maintenance project