Renovations6 min read
What a full renovation actually costs in the UK
Numbers people find online are usually outdated, London-centric, or from the cheap end of the market. These are realistic ranges for 2025-26 based on current UK labour and material costs.
London adds 20-40% to most of these figures. Specification, existing condition, and how much you project manage yourself all affect the final number significantly.
Kitchen
- Basic (flat-pack, standard appliances): £8,000 to £12,000
- Mid-range (solid units, integrated appliances): £12,000 to £25,000
- High-end (bespoke joinery, premium appliances): £25,000 to £60,000+
Bathroom
- Basic: £4,000 to £7,000
- Mid-range: £7,000 to £15,000
- High-end: £15,000 to £30,000+
- En-suite: add similar on top. Moving drainage adds cost.
Loft conversion
- Dormer: £40,000 to £65,000
- Hip-to-gable: £45,000 to £70,000
- Mansard: £55,000 to £85,000+
- Planning, building regs, and party wall agreements are additional costs.
Single-storey rear extension
- Small (under 15m2): £25,000 to £40,000
- Medium (15-30m2): £40,000 to £70,000
- Large (30m2+): £70,000 to £120,000+
- Shell only. Fit-out (kitchen, etc.) is additional.
Other common works
- Full rewire: £6,000 to £12,000. Non-negotiable in older properties.
- New boiler and heating: £2,000 to £4,500 installed.
- Full internal replaster: £5,000 to £15,000 depending on size.
- Windows, full house double glazing: £8,000 to £20,000.
- Flooring throughout (mid-range): £5,000 to £12,000.
The gap between budget and actual spend almost always comes from groundworks and unforeseen structural issues. Budget a minimum 15-20% contingency on any serious renovation. It is not pessimism. It is just how buildings work.
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