DATA-BACKED GUIDE · UPDATED JULY 2026
House renovation cost UK: how to budget a full renovation
A full house renovation covers everything from rewiring and a new roof to kitchens, bathrooms and decorating, which is why the total can feel hard to pin down. The trick is to budget in stages and keep a contingency, because older homes always hide a few surprises. The real prices below come from genuine prices across the UK, so you can build a budget on real numbers rather than guesswork.
The quick version
- Renovation costs are best built room by room and trade by trade, then added up, rather than guessed as one lump sum.
- The hidden essentials, rewiring, replumbing, roofing and damp work, often cost more than the visible finishes and are easy to underestimate.
- Set aside a contingency of at least ten percent, because older properties reliably throw up problems once walls and floors come up.
- Structural changes and any extension may need building regulations sign-off, and some work needs planning permission, so factor those steps in.
What people actually paid
Real prices, in people's own words
- £70,000“So far we have spent nearly £70k on: Roof replacement £25k. Asbestos removal £4k...”
- £170,000“Extension, bit of landscaping, loft and full refurb just cost us about £170ish.”
- £200,000“Friend did similar last year for just over 200k and A LOT of time spent”
- £450,000“It's cost us the best part of £450k.”
Genuine amounts posted publicly. We publish the price and the quote, never the person.
Why the price varies so much
The age and condition of the house drive everything. A tired but sound home just needs cosmetic work, while a neglected property may need a full rewire, new plumbing, roof repairs and damp treatment before you even reach the fun bits. The number of bathrooms and the kitchen spec are big swings, and moving walls or adding an extension adds another layer. Location changes labour rates, and the quality of finish you choose, from budget to high end, can double the figure on the same house. That is why two renovations of the same size can land so far apart.
How to pay less
- Prioritise the structural and hidden work first, wiring, roof and damp, then spread the cosmetic finishes over time as budget allows.
- Get separate quotes for the big trades rather than handing everything to one contractor, and compare them against the real prices below.
- Keep plumbing and the kitchen in their existing positions where you can, since moving services is one of the costliest changes.
- Buy fittings, tiles and paint yourself in sales rather than paying a supply markup, and agree a fixed price for labour up front.
Common questions
How do I budget for a full house renovation?
Break it down room by room and trade by trade, price each part against the real prices below, then add a contingency of at least ten percent for the surprises older homes always hide. That gives you a working budget you can defend rather than a single hopeful number.
What usually blows a renovation budget?
The hidden work does it, like a rewire, damp treatment, roof repairs or rotten joists found once floors come up. These are hard to see when you buy but essential to fix, so build them into the plan before spending on kitchens and decorating.
Do I need permissions for a renovation?
Cosmetic work usually does not, but structural changes, an extension or a loft conversion often need building regulations sign-off, and some need planning permission too. Planning and building regulations are separate approvals, so check both early to avoid delays.