If your home has no central heating, outdated pipework, or an inefficient system, you may be considering a full central heating installation. One of the first questions homeowners ask is how much a complete system replacement actually costs.
In this guide, we break down the full central heating installation cost, what’s included, and the factors that affect pricing, so you can decide whether a full system install is the right option for your property.
In 2026, the full heating system installation price typically ranges from £4,500 to £7,500+, depending on property size and system complexity.
| Property Type | Typical Cost Range |
|---|---|
| 1–2 bedroom flat | £4,500 – £5,500 |
| 3 bedroom house | £5,500 – £6,500 |
| 4+ bedroom house | £6,500 – £7,500+ |
This type of work is normally carried out as part of a professional boiler installation, especially when replacing older or inefficient systems.
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A full installation involves more than just fitting a boiler.
| Included Work | Why It’s Required |
|---|---|
| New boiler installation | Provides efficient heat and hot water |
| Radiators & pipework | Distributes heat throughout the property |
| Heating controls | Improves efficiency and comfort |
This is why the central heating installation cost is higher than a like-for-like boiler replacement.
1.Property Size & Layout
Larger homes require:
More radiators
Longer pipe runs
Higher output boilers
This directly impacts the new central heating system cost.
2.Number of Radiators
Each additional radiator increases:
Labour time
Pipework materials
Balancing and commissioning work
3.Boiler Type & System Design
The type of boiler chosen plays a major role. Some installations also include upgrades such as:
New gas pipework
Smart heating controls
Improved zoning
All of this affects how much central heating installation costs overall.
A full system installation is often worthwhile if:
Your property has no existing central heating
Pipework is outdated or inefficient
You’re renovating or extending your home
However, if your system is modern and only the boiler has failed, a standard boiler replacement may be a more cost-effective option.
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| Scenario | Best Option |
|---|---|
| No central heating installed | Full central heating installation |
| Old or inefficient pipework | Full system replacement |
| Modern system, faulty boiler | Boiler replacement only |
For properties requiring a full upgrade, our full central heating installation service provides a complete solution from design to commissioning.
You can control costs by:
Installing the correct boiler size
Avoiding unnecessary system upgrades
Planning installation alongside renovation work
Once installed, many homeowners also choose boiler cover to help protect their new heating system against unexpected repair costs.
The only reliable way to calculate your full central heating installation cost is through a professional assessment that considers:
Property size and layout
Existing infrastructure
Heating requirements
If you’re planning a complete system upgrade, our full central heating installation service and Boiler Installation team can provide clear guidance and transparent pricing.
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A-rated boilers installed from £1795
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