Boiler Installation & Replacement in Lewisham
Boiler installation in Lewisham starts with a free in-home survey and a fixed written quote, covering Catford, Deptford, Forest Hill and Blackheath. 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 Lewisham
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
Lewisham housing & boilers
Lewisham housing is dominated by Victorian and Edwardian terraces with period conversions. In Lewisham's Victorian and Edwardian terraces and period conversions, a boiler replacement often involves specific practical considerations. For leasehold flats in areas like Forest Hill or Blackheath, securing freeholder consent is a necessary first step. Flue routing can also require careful planning to meet conservation area guidelines, particularly for properties in postal districts like SE23 or SE13. For larger period homes in Catford or Deptford with multiple bathrooms, a system boiler with a cylinder might be a suitable option to ensure good hot water flow. Understanding the differences between combi, system, and regular boilers can help determine the best replacement for your property's layout and needs.
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 Lewisham
- 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 Lewisham
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 Lewisham
Where we work
Lewisham 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 Lewisham — FAQs
How does a new boiler installation work in Lewisham?
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 Lewisham property without an engineer seeing it first.
Do you charge for the survey in Lewisham?
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 Lewisham?
Survey appointments across Lewisham are usually available within a few days. Tell us if your existing boiler has failed and you need to move faster.
Which parts of Lewisham do you cover?
All of it — including Catford, Deptford, Forest Hill, Blackheath. 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 Lewisham?
Tell us about the property. Free survey, fixed quote in writing, no obligation to proceed.
Get a free survey