How Much Does It Cost to Replace a Boiler in Kent?

  • December 10, 2025

Replacing a boiler is a major investment for any homeowner. It’s not just about staying warm during the…

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    We understand that the boiler industry can be confusing, with plenty of outdated or misleading information. That’s why we rely only on trusted, proven sources to guide our advice and installations:

    • Experienced heating engineers with years of hands-on boiler installation and maintenance expertise
    • Our in-house data from real-world boiler performance, servicing records, and system diagnostics
    • Recognised authorities like Gas Safe and the UK government

    At a glance

    Replacing a boiler is a major investment for any homeowner. It’s not just about staying warm during the winter—it’s also about ensuring energy efficiency, safety, and reliability. If you’re based in Kent and wondering what to expect in terms of boiler replacement costs, this blog will help you understand the variables involved and how to make a well-informed decision.

    Why Replace Your Boiler?

    There are several common reasons for replacing a boiler:

    • The current boiler is over 10–15 years old
    • Frequent breakdowns and costly repairs
    • Rising energy bills due to inefficiency
    • Upgrading to a modern, eco-friendly model
    • Moving to a different type of boiler (e.g. combi to system)

    Newer boilers are more energy-efficient, quieter, and compact. They can help save money over time—especially with rising gas and electricity costs.

    Average Cost of Boiler Replacement in Kent

    The average cost to replace a boiler in Kent can range from £1,800 to £3,000, depending on several factors. Here’s a breakdown of what influences the price:

    1. Boiler Type

    • Combi Boiler (Gas) – From £1,800–£2,500
    • System Boiler – From £2,200–£2,800
    • Regular/Conventional Boiler – From £2,200–£3,000

    Combi boilers are typically the cheapest and most popular for small to medium-sized homes due to their space-saving design and built-in hot water supply.

    2. Complexity of the Installation

    If you’re switching boiler types, adding new pipework, or relocating the boiler, installation becomes more complex and time-consuming, which increases labour costs.

    3. Brand and Model

    Higher-end brands (e.g. Worcester Bosch, Vaillant) come with longer warranties and better build quality but tend to cost more.

    4. Additional Work

    • Power flushing your heating system: +£300–£600
    • Installing a new flue: +£150–£400
    • Adding smart controls or thermostats: +£150–£300
    • Asbestos removal (if present): +£400+

    How Much Do Kentish Plumbers Charge?

    At Kentish Plumbers, we offer competitive pricing tailored to your exact home setup. All our prices include:

    • Removal and disposal of your old boiler
    • Supply and installation of a brand-new boiler
    • All necessary fittings and flue components
    • Gas Safe certification and post-installation checks

    We also provide a free quote with no obligation and can usually install your boiler within 48 hours of approval.

    Boiler Brands We Recommend

    We work with some of the most trusted names in the industry, including:

    • Worcester Bosch – Great efficiency and reliability
    • Vaillant – German engineering with long warranties
    • Ideal – Budget-friendly with strong customer reviews
    • Baxi – Compact and efficient for smaller homes

    We’ll help you choose a boiler that fits your needs, budget, and future energy goals.

    Can I Get a Grant or Finance?

    Yes! Depending on your situation, you may be eligible for:

    • The Boiler Upgrade Scheme (BUS) – For heat pumps and renewable upgrades
    • ECO4 Scheme – For low-income households (subject to criteria)
    • Flexible finance plans – Kentish Plumbers offers interest-free and low-interest finance options for up to 5 years

    We’ll guide you through eligibility and help with applications.

    Warning Signs You Need a New Boiler

    If you’re unsure whether your current boiler is due for replacement, look for these red flags:

    • Constant pressure drops
    • Noises like banging or whistling
    • Yellow flame (instead of blue)
    • Radiators taking too long to heat
    • Leaks or signs of corrosion

    Our Gas Safe engineers can inspect your boiler and advise whether a repair or full replacement is more economical.

    Why Choose Kentish Plumbers?

    • Local Experts: Based in Kent, we know the heating needs of local homes.
    • Fast Turnaround: Same-day surveys and 48-hour installs available.
    • Transparent Pricing: No hidden costs. Ever.
    • Warranty-Backed Installs: Up to 10 years on selected boilers.
    • Rated 5★ by Customers: Trusted by homeowners across Kent.

    Conclusion: Know the Cost Before You Commit

    The cost to replace a boiler in Kent varies depending on your property, preferences, and technical requirements—but with the right provider, it doesn’t have to be a hassle.

    Contact Kentish Plumbers today for a free, no-obligation quote. Our experienced engineers will walk you through your options and help you choose the most efficient solution for your home and budget.

    Related articles

    At a glance

    Replacing a boiler is a major investment for any homeowner. It’s not just about staying warm during the winter—it’s also about ensuring energy efficiency, safety, and reliability. If you’re based in Kent and wondering what to expect in terms of boiler replacement costs, this blog will help you understand the variables involved and how to make a well-informed decision.

    Why Replace Your Boiler?

    There are several common reasons for replacing a boiler:

    • The current boiler is over 10–15 years old
    • Frequent breakdowns and costly repairs
    • Rising energy bills due to inefficiency
    • Upgrading to a modern, eco-friendly model
    • Moving to a different type of boiler (e.g. combi to system)

    Newer boilers are more energy-efficient, quieter, and compact. They can help save money over time—especially with rising gas and electricity costs.

    Average Cost of Boiler Replacement in Kent

    The average cost to replace a boiler in Kent can range from £1,800 to £3,000, depending on several factors. Here’s a breakdown of what influences the price:

    1. Boiler Type

    • Combi Boiler (Gas) – From £1,800–£2,500
    • System Boiler – From £2,200–£2,800
    • Regular/Conventional Boiler – From £2,200–£3,000

    Combi boilers are typically the cheapest and most popular for small to medium-sized homes due to their space-saving design and built-in hot water supply.

    2. Complexity of the Installation

    If you’re switching boiler types, adding new pipework, or relocating the boiler, installation becomes more complex and time-consuming, which increases labour costs.

    3. Brand and Model

    Higher-end brands (e.g. Worcester Bosch, Vaillant) come with longer warranties and better build quality but tend to cost more.

    4. Additional Work

    • Power flushing your heating system: +£300–£600
    • Installing a new flue: +£150–£400
    • Adding smart controls or thermostats: +£150–£300
    • Asbestos removal (if present): +£400+

    How Much Do Kentish Plumbers Charge?

    At Kentish Plumbers, we offer competitive pricing tailored to your exact home setup. All our prices include:

    • Removal and disposal of your old boiler
    • Supply and installation of a brand-new boiler
    • All necessary fittings and flue components
    • Gas Safe certification and post-installation checks

    We also provide a free quote with no obligation and can usually install your boiler within 48 hours of approval.

    Boiler Brands We Recommend

    We work with some of the most trusted names in the industry, including:

    • Worcester Bosch – Great efficiency and reliability
    • Vaillant – German engineering with long warranties
    • Ideal – Budget-friendly with strong customer reviews
    • Baxi – Compact and efficient for smaller homes

    We’ll help you choose a boiler that fits your needs, budget, and future energy goals.

    Can I Get a Grant or Finance?

    Yes! Depending on your situation, you may be eligible for:

    • The Boiler Upgrade Scheme (BUS) – For heat pumps and renewable upgrades
    • ECO4 Scheme – For low-income households (subject to criteria)
    • Flexible finance plans – Kentish Plumbers offers interest-free and low-interest finance options for up to 5 years

    We’ll guide you through eligibility and help with applications.

    Warning Signs You Need a New Boiler

    If you’re unsure whether your current boiler is due for replacement, look for these red flags:

    • Constant pressure drops
    • Noises like banging or whistling
    • Yellow flame (instead of blue)
    • Radiators taking too long to heat
    • Leaks or signs of corrosion

    Our Gas Safe engineers can inspect your boiler and advise whether a repair or full replacement is more economical.

    Why Choose Kentish Plumbers?

    • Local Experts: Based in Kent, we know the heating needs of local homes.
    • Fast Turnaround: Same-day surveys and 48-hour installs available.
    • Transparent Pricing: No hidden costs. Ever.
    • Warranty-Backed Installs: Up to 10 years on selected boilers.
    • Rated 5★ by Customers: Trusted by homeowners across Kent.

    Conclusion: Know the Cost Before You Commit

    The cost to replace a boiler in Kent varies depending on your property, preferences, and technical requirements—but with the right provider, it doesn’t have to be a hassle.

    Contact Kentish Plumbers today for a free, no-obligation quote. Our experienced engineers will walk you through your options and help you choose the most efficient solution for your home and budget.

    Related articles