Boiler Installation & Replacement in Merton
Boiler installation in Merton starts with a free in-home survey and a fixed written quote, covering Wimbledon, Mitcham, Morden, Raynes Park and Colliers Wood. This page is about replacing a boiler: if yours only needs a breakdown repair or its yearly service, a repair or servicing visit is the quicker and cheaper answer.
Free survey, fixed quote
Nothing is quoted until an engineer has seen the property.
All of Merton
Survey and installation appointments across the whole borough.
Gas Safe notified
Every installation notified for Building Regulations through the Gas Safe scheme.
Benchmark commissioned
Completed for your manufacturer warranty on every install.
Local knowledge
Merton housing & boilers
Merton housing is dominated by Edwardian semis, interwar terraces and mansion flats. Replacing a boiler in Merton's Edwardian semis, interwar terraces and mansion flats involves specific planning. The inner-period housing character means properties in areas like Wimbledon, Mitcham and Morden often have leasehold arrangements, requiring freeholder consent for installation. Flue placement can also be a key consideration, particularly for flats in conservation areas or in neighbourhoods with tight external spaces, such as in the SW19 or CR4 postal districts. For larger period homes with multiple bathrooms, understanding the differences between combi and system boilers is important to meet hot water demand. A survey of your property's layout and existing system will help determine the most suitable replacement.
Knowing the local building stock matters: it tells us what to expect on flue routing, pipework and available space for a cylinder — before we arrive for the survey.
Covered in Merton
- New boiler installation — combi, system or regular
- Combi and system boiler replacement
- Old boiler removal and responsible disposal
- Central heating system upgrades and power flushing
- Free in-home survey with a fixed written quote
- Gas Safe registered engineers on every job
Survey, recommend, install
Free in-home survey
An engineer assesses radiators, bathrooms, pipework and flue routing before anything is quoted.
Right-sized recommendation
Combi, system or regular — recommended on merit for the property, not by default.
Gas Safe installation
Fitted by a fully Gas Safe registered engineer, commissioned to the Benchmark checklist.
What we do
Boiler services in Merton
New Boiler Installation
Free Survey, Fixed Quote
Combi Boiler Replacement
Most Common Replacement in London Flats & Terraces
System Boiler Replacement
Built for Multiple Bathrooms
Old Boiler Removal & Disposal
Safe Isolation, Responsible Disposal
Central Heating System Upgrade
Beyond Just the Boiler
Hot Water Cylinder Replacement
Vented or Unvented, Sized to Your Household
Boiler & Cylinder Combined Replacement
One Survey, One Fixed Quote, Both Sized Properly
Areas we cover in Merton
Where we work
Merton coverage map
Map data © OpenStreetMap contributors.
Before you book anyone
How Much Does It Cost to Replace a Combi Boiler?
A like-for-like combi swap typically costs £1,050 to £2,250 for a 24-27kW boiler and £2,000 to £2,800 for a 28-30kW one on UK averages. Moving the boiler, the flue, the gas pipe and the state of the system decide where your quote lands.
New boiler installation in Merton — FAQs
How does a new boiler installation work in Merton?
The same way everywhere we cover: a free in-home survey first, a fixed written quote based on what the engineer finds, then a Gas Safe registered installation. Nothing is quoted for a Merton property without an engineer seeing it first.
Do you charge for the survey in Merton?
No — the in-home survey is free and comes with no obligation to proceed. You only pay if you accept the fixed quote that follows.
How quickly can you survey a property in Merton?
Survey appointments across Merton are usually available within a few days. Tell us if your existing boiler has failed and you need to move faster.
Which parts of Merton do you cover?
All of it — including Wimbledon, Mitcham, Morden, Raynes Park, Colliers Wood. We cover every London borough, so coverage never depends on which side of a postcode line you live.
Read before you book
Boiler guides
How Much Does It Cost to Replace a Combi Boiler?
A like-for-like combi swap typically costs £1,050 to £2,250 for a 24-27kW boiler and £2,000 to £2,800 for a 28-30kW one on UK averages. Moving the boiler, the flue, the gas pipe and the state of the system decide where your quote lands.
ReadAre Baxi Boilers Any Good? Which Baxi Boiler Should You Choose?
Baxi boilers are a sound, budget-conscious choice when the type and output match your home. The 200 to 800 tiers mostly differ in features and warranty; sizing decides whether the boiler keeps up.
ReadAre Vokera Boilers Any Good? What to Know Before Replacing Yours
Vokera is a value-to-mid-range boiler brand that does the job well when it is the right type and size and fitted properly. The bigger decision is usually what to replace an old Vokera with, not the badge on the front.
ReadWhich Vaillant Boiler Should I Buy? ecoFIT pure vs ecoTEC plus vs ecoTEC exclusive
Vaillant sells three tiers of gas boiler. The right one depends on your system type and hot water demand first, and budget second; the model number tells you both the type and the size.
ReadHow Long Is a Boiler Warranty? What a New Boiler Warranty Covers
A new boiler warranty can run from a few years to over a decade. The length depends on the manufacturer, the model and the installer's accreditation, and it only holds if the boiler is registered and serviced.
ReadCan You Use the Toilet and Water While a Boiler Is Being Replaced?
Toilets and cold taps usually keep working while a boiler is replaced, because the mains is only off in short spells. Hot water and heating are off all day, and the gas for part of it.
ReadNew boiler installation across London
Thinking about a new boiler in Merton?
Tell us about the property. Free survey, fixed quote in writing, no obligation to proceed.
Get a free survey