New Boiler Cost in the UK

How Much Does a New Boiler Cost in the UK?
A 2025 Price Guide
If you’re considering installing a new boiler, one of the biggest questions on your mind is likely the new boiler cost. Prices can vary significantly depending on the type, brand, installation complexity, and location. This guide will provide a general price range to help you budget for your new boiler in 2025.
Factors Affecting New Boiler Cost
The cost of a new boiler cost installation depends on several factors, including:
- Type of boiler (combi, system, or conventional)
- Size and power output (measured in kW)
- Installation complexity (straight replacement vs. system conversion)
- Boiler brand and model
- Additional components (e.g., smart thermostats, new pipework, radiators)
- Labour costs (which vary by region)
New Boiler Cost by Type
1. Combi Boiler Cost
- Price Range (including installation): £1,800 – £3,500
- Best for: Small to medium-sized homes with one or two bathrooms
- Pros: Compact, energy-efficient, and lower installation costs

2. System Boiler Cost
System boilers require a hot water cylinder but no cold water tank, making them ideal for homes with higher hot water demands.
- Price Range (including installation): £2,000 – £4,000
- Best for: Medium to large homes with multiple bathrooms
- Pros: Good water pressure, can handle multiple taps running simultaneously

3. Conventional (Regular) Boiler Cost
Conventional boilers use both a hot water cylinder and a cold water tank, making them suitable for older heating systems.
- Price Range (including installation): £2,000 – £4,500
- Best for: Large homes or properties with traditional heating systems
- Pros: Can supply hot water to multiple outlets without loss of pressure

Check the table underneath for better comparison
Boiler Type | Price Range (Including Installation) | Best For | Key Benefits |
---|---|---|---|
Combi Boiler | £1,800 – £3,500 | Small to medium homes | Compact, energy-efficient, lower installation cost |
System Boiler | £2,000 – £4,000 | Medium to large homes | Good water pressure, handles multiple taps |
Conventional Boiler | £2,000 – £4,500 | Large homes with traditional heating | Supplies multiple outlets without pressure loss |
Installation Costs: What’s Included?
When getting a quote for a new boiler, installation costs will typically cover:
- Removal and disposal of the old boiler
- New boiler unit and any required pipework adjustments
- Installation of a flue and condensate pipe
- System flushing and testing
- Labour and Gas Safe certification
However, additional work (e.g., relocating the boiler, upgrading radiators, or installing a smart thermostat) can increase costs.
Other New Boiler Cost Considerations
- Boiler relocation: Moving a boiler to a different part of the house can add £300 – £800 to installation costs.
- Upgrading pipework: If your home’s pipes are old or undersized, expect additional costs of £200 – £600.
- Smart thermostat installation: Adding a smart thermostat like Nest or Hive may cost an extra £100 – £300.
Ways to Save on a New Boiler
- Government grants: Check if you qualify for schemes like the ECO4.
- Seasonal discounts: Some installers offer discounts during off-peak seasons (spring and summer).
- Compare multiple quotes: Get at least three quotes from Gas Safe registered engineers to ensure the best deal.
- Finance options: Many companies offer interest-free or low-interest financing for new boilers.
Potential Savings with a New Boiler
A modern, energy-efficient boiler can significantly reduce your annual heating bills. Here’s a rough estimate of potential savings:
Old Boiler Efficiency | New Boiler Efficiency | Potential Annual Savings (Average UK Home) |
---|---|---|
60-70% (Very Old Boiler) | 90-94% (New A-Rated Boiler) | £300 – £500 |
75-85% (Mid-Efficiency) | 90-94% (New A-Rated Boiler) | £150 – £250 |
85-89% (Relatively Modern) | 90-94% (New A-Rated Boiler) | £50 – £100 |
Upgrading from an old inefficient boiler to a modern A-rated condensing boiler can reduce gas consumption and lower energy bills, making it a cost-effective long-term investment.
Final Thoughts
While a new boiler is a significant investment, it can improve energy efficiency and reduce heating bills in the long run. The best approach is to research different types, compare installation quotes, and consider long-term savings when choosing the right boiler for your home.
If you want to ask about new boiler cost do not hesitate to contact us!