In 2026, light refurbishment of a three-bed UK house typically runs from around £20,000 to £50,000, while a full back-to-brick renovation with structural changes commonly lands between £75,000 and £150,000 or more. The honest answer for your house only exists after a builder has stood in it, because the biggest cost drivers are hidden until someone looks.
Ask three builders what a renovation costs and you will get three numbers that seem to describe three different planets. They usually describe three different scopes. This guide explains the real ranges, what actually moves them, and how to compare quotes so the cheapest number does not become the most expensive decision.
The honest ranges in 2026
- Cosmetic refresh of a three-bed house, meaning decoration, flooring and a light kitchen or bathroom update: roughly £10,000 to £25,000
- Light refurbishment, adding a new kitchen, new bathroom and some replastering: roughly £20,000 to £50,000
- Full renovation back to brick, with rewire, replumb, new heating and full refit: roughly £75,000 to £150,000
- Renovation plus structural change, moving walls, steels and layout replanning: £100,000 upward, driven mostly by the structural scope
Treat these as orientation, not quotes. Regional labour rates, the age of the house and how much of the unknown sits behind your plaster all move the figure.
What actually moves the price
The condition of what you cannot see
Wiring, pipework, joists and damp are the four usual suspects. None of them show up in a phone estimate. This is why a builder who insists on visiting before pricing is protecting you as much as themselves: most of the five-figure surprises in renovation stories were visible to someone who looked before quoting.
Structural work
Every wall that comes out brings an engineer, a steel, building control and making good. One opened-up kitchen wall is well understood money. Three walls, a chimney breast and a new opening in a load-bearing spine is a different project, and the price reflects it.
The specification you finish with
The same room can be finished at £40 per square metre or £140 per square metre in tiles alone. Kitchens run from £8,000 to £40,000 before anyone fits them. When two quotes are far apart, the specification is the first place to look.
Drying time and sequencing
Wet trades need drying windows, and a badly sequenced job pays for trades to stand still. A builder who gives you a programme with the quote has thought about this. One who cannot probably has not.
How to compare quotes properly
An itemised quote is the whole game. It tells you what is included, what is excluded, and where the risk sits. When you have three itemised quotes, compare them line by line and ask each builder what their number assumes about the unseen work. The best answer is a provisional sum stated in writing, with rates agreed in advance for whatever the strip-out reveals.
A final habit worth having: ask who will actually run the job day to day, and whether that person is the one who priced it. Projects go wrong in handoffs. Fewer handoffs, fewer surprises.
Questions
Related questions
What is the biggest hidden cost in a house renovation?
What is behind the finishes. Failed wiring, corroded pipework, rotten joists and damp walls do not show up in an online estimate and routinely add five figures to a back-to-brick job. A builder who inspects before quoting can price most of this in advance instead of discovering it on your invoice.
Is it cheaper to renovate room by room or all at once?
All at once is almost always cheaper per room, because scaffold, skips, trades and drying time are shared across the whole job. Room by room spreads the cash flow, which suits some households, but expect to pay a premium for the convenience across the whole project.
Should I pick the cheapest renovation quote?
Only if it is itemised and you can see what it excludes. Most bad renovation experiences start with a low headline number that silently excluded making good, waste, or building control fees. Compare quotes line by line, and treat a number that is far below the others as a warning rather than a bargain.
Do renovation costs include VAT?
Quotes from VAT-registered builders should say clearly whether VAT is included. On most renovation work VAT applies at the standard rate, though some conversions and long-empty properties qualify for reduced rates. Ask the question before you sign, not when the invoice arrives.