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Renovation cost calculator
Choose your project, size, finish and postcode. You get a UK price range with VAT, fees and a contingency, based on prices reviewed in September 2026.
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Cost guides for every project
- House extension costs
- Loft conversion costs
- New kitchen costs
- Bathroom costs
- Garage conversion costs
- Whole-house renovation costs
- New build house costs
- House rewire costs
- New roof costs
- Knock-through with steel beam costs
- New boiler costs
- Air source heat pump costs
- Replacement windows costs
How accurate is it?
The ranges come from published 2026 UK cost guides and our own council fee research, adjusted for your region and checked every quarter. They are for planning and for challenging quotes. They are not a builder's price: site conditions, access and specification can move a real quote outside the range. Read the method.