What affects the cost?
Whole-house renovation costs vary with property size, condition and whether the project includes heating, rewiring, windows, plastering, kitchens, bathrooms or structural work.
- Property size and existing condition
- Heating and electrical replacement
- Kitchen and bathroom specification
- Plastering and decoration
- Structural changes
- Location and 10–15% contingency
Typical cost breakdown
Regional planning examples
The examples below apply our published modelling factor to the same national benchmark. They are not claimed as observed city-wide average quotes.
Sources used for this guide
House Renovation: Cost Breakdown 2026
Published / checked: June 2026
Used for: Whole-house renovation benchmark and contingency guidance
Construction output price indices
Published / checked: 13 August 2026
Used for: Construction price trend and update checks
Frequently asked questions
How much does a 3-bedroom house renovation cost?
A current UK planning benchmark is roughly £43,530 to £110,350, with a midpoint around £76,690, before project-specific differences.
How much contingency should I allow?
Around 10–15% is a common planning allowance, and more may be sensible for older or poorly understood properties.
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