Boiler Installation in London
A new boiler fitted properly, commissioned on the instruments and notified to Building Control. We size the appliance to the property rather than selling you the biggest one on the list.
Boiler Installation prices
From £999 for a straightforward combi replacement. All prices include VAT.
- All prices include VAT
- No call-out charge on booked work
- Any variation agreed before you book
Boiler Installation
Combi replacement, same position
System flush and filter
Building Control notification
The price depends on the boiler chosen, whether the position is changing, and whether the system needs a flush or upgraded controls. We survey first and quote in writing, so the figure you agree is the figure you pay.
What the installation covers
Correct sizing
The boiler is sized to the heat loss and hot water demand of the actual property. An oversized boiler cycles constantly, runs less efficiently and wears out sooner.
Flue routed and tested
The flue is installed to the manufacturer instructions with correct clearances from windows, doors and boundaries, then checked for integrity before commissioning.
System protection
We fit a filter and treat the system so debris from the old pipework does not end up in the new heat exchanger. This is the most common reason a new boiler fails early.
Controls and commissioning
Thermostat and controls are set up correctly, the boiler is commissioned on a flue gas analyser and the readings recorded, so it leaves running as the manufacturer intends.
Certification and notification
You receive the commissioning documentation and warranty registration, and we notify Building Control as required for a new gas appliance.
What matters on a boiler replacement
Most new boilers that fail early do not fail because of the boiler. They fail because debris from old steel pipework and radiators is pushed through a brand new heat exchanger. Cleaning the system and fitting a filter at the point of installation is what protects the appliance, and it is why we will not skip it to shave money off a quote.
Sizing matters just as much. A 35kW combi in a two bedroom flat is a common sight and a poor choice — it short cycles, wastes gas and shortens its own life. The right size comes from the heat loss and the hot water demand, not from a rule of thumb.
Installing a gas boiler is notifiable work. It must be carried out by a Gas Safe registered engineer and notified to Building Control, which is what registers the warranty and gives you the compliance certificate. Work done outside that route leaves you with an appliance you cannot evidence and a warranty that may not stand.
Who needs one
- Homeowners replacing an old or failed boiler
- Landlords upgrading heating in a rental property
- Anyone whose boiler is beyond economic repair
- Properties converting from a conventional system to a combi
- Letting agents refurbishing between tenancies
- Anyone facing repeated breakdowns and rising repair bills
Three steps to your certificate
Booked, inspected and certified — usually inside 48 hours from your first call.
01
Book
Call, WhatsApp or send the quote form. We confirm your fixed price and a slot that suits your tenants.
02
Inspect
A qualified engineer attends, carries out the inspection in full and talks you through anything that needs attention.
03
Certify
Your certificate is issued electronically within 24 hours, ready to forward to tenants, agents or the council.
Boiler Installation FAQs
From 999 pounds for a straightforward combi replacement in the same position. The final price depends on the appliance, any pipework changes and whether the system needs flushing or new controls. We survey and quote in writing before anything is booked.
A like for like combi swap is usually a single day. Moving the boiler to a different position, or converting from a conventional system, typically takes two days.
Yes. A new gas boiler is notifiable work. We notify it, register the manufacturer warranty and provide you with the compliance paperwork.
On most replacements, yes. Debris from existing pipework is the main cause of early failure in a new boiler, and manufacturers can decline warranty claims where the system was not cleaned. We advise honestly on what your system needs.
That depends on the appliance and the manufacturer, and typically runs from several years to over a decade. We register it for you on completion and tell you what it requires, usually an annual service, to stay valid.
Other services we provide
Book more than one and we complete them in a single visit — one appointment for your tenants instead of several.
Why clients keep referring us
Book your safety certificate today
Qualified, insured engineers across London. Same-day appointments and certificates issued electronically within 24 hours.