Plumbing & Heating · UK Guide 2026
Boiler Replacement Costs UK: Budget and Quote Guide
JASOTO · Updated October 3, 2026 · 256 words
AI-generated illustration; it does not show a customer project or a tested product.
A like-for-like replacement and a relocation have different work. The proposed boiler should be selected after assessing the home and existing heating system.
Key checks for boiler replacement
- Confirm boiler, controls and warranty conditions.
- Include flue, pipework and commissioning.
- Ask who handles certification and the old unit.
An illustrative quote comparison
One installation is a suitable like-for-like replacement; another moves the appliance and changes services.
Compare the assessed boiler and system specification. Include controls, flue, commissioning and warranty conditions.
Build your boiler replacement budget
Use the same scope for each quotation. Enter tax-inclusive figures consistently, and include separately priced work only once.
The calculator below uses the figures you enter from a quotation. It does not estimate market prices. Confirm what the quoted amount includes, whether VAT applies and which costs remain provisional.
- Confirm boiler, controls and warranty conditions.
- Include flue, pipework and commissioning.
- Ask who handles certification and the old unit.
Calculate your quoted budget
Use the same scope for each quotation. Enter tax-inclusive figures consistently, and include separately priced work only once.
Enter figures from your quote. Use amounts including VAT consistently. Leave extras blank if none apply. These fields stay in your browser.
Calculated total
Enter valid quoted figures
This is arithmetic using your figures, not a market estimate. Include separately charged work once and check provisional costs with the provider.
Before you book or buy
- Confirm boiler, controls and warranty conditions.
- Include flue, pipework and commissioning.
- Ask who handles certification and the old unit.
Frequently asked questions
What should I confirm before budgeting for boiler replacement?
A like-for-like replacement and a relocation have different work. The proposed boiler should be selected after assessing the home and existing heating system. Confirm boiler, controls and warranty conditions.
Does the calculator show a typical UK price?
No. It adds up your quoted figures for the quantity you choose. Published provider examples, where supplied, are identified separately and are not a national average.
Continue with JASOTO
Compare your next step
Discover UK businesses, compare services and request written quotes before making a decision.