How much does a renovation cost in the UK in 2026?

The median UK renovation cost is £21,000+ (Houzz UK 2024), up 26% on the previous year. That figure is the middle of the market: half of all renovations cost more, half cost less. The mean is higher, because big extensions and full-house refurbs pull the average up.

What that headline number hides:

Regional variation. London and the South East run 25–35% above the UK average for the same scope of work (Federation of Master Builders, HomeOwners Alliance). The North East, Wales and parts of the Midlands sit 10–20% below. A £30,000 kitchen in Richmond is a £19,000 kitchen in Newcastle, give or take.

How people pay.83% of UK renovators fund their projects from savings (Houzz UK 2025). Loans and remortgages make up most of the rest. The savings-funded pattern matters because it makes accuracy on cost more important: there's no buffer beyond what's in the account.

What sets the project off.37% of renovations are triggered by kitchen deterioration (Houzz UK 2026). The rest are split between bathrooms, structural issues uncovered by surveys, and "the room hasn't been touched in twenty years" decisions. The trigger usually expands. A kitchen replacement turns into a kitchen-plus-flooring-plus-rewire because once you start moving things, more things need moving.

The cost-of-living context. Despite financial pressure, 54% of UK homeowners are still planning home improvements (Houzz UK). The budget psychology has shifted, though. Same project, tighter scrutiny on every line.

If you're earlier in your renovation and want the broader starting-point context, see our complete first renovation guide→.

The figures below come from our quarterly cost tracking (May 2026 refresh). All are UK-wide medians; the CCI model adjusts these for regional and property-type variation at postcode-district level. National medians are useful for setting expectations. For accurate planning, the project-specific calculators run the regional adjustment for your postcode.

Kitchens

Median UK kitchen renovation: £17,500 (Houzz UK 2025). Smaller kitchens under 100 square feet have a median closer to £4,900(Houzz UK 2025), usually replacements rather than full reconfigurations. The spread between budget and bespoke is wider than most people guess. A flat-pack galley with laminate worktops can come in at £7,000–£10,000 fully fitted. A bespoke shaker with quartz and integrated appliances can hit £35,000–£50,000 in the same square metreage.

What moves the number most isn't the units. It's whether you're moving plumbing, gas or electrics, and what happens to the floor. A "new kitchen" that keeps the same footprint and finishes the existing flooring is a much smaller job than a "new kitchen" with an island, a re-routed soil stack, and underfloor heating.

For the full breakdown by size, layout and finish, including the regional adjustment for your postcode, see what a kitchen renovation should actually cost in your area→.

Bathrooms

The median UK primary bathroom spend is £7,000(Houzz UK 2024 Bathroom Trends Study), up 33% on the previous year. HomeOwners Alliance puts the typical "average new bathroom" closer to £6,000 (HOA 2025), with a working range of £4,500–£12,000 depending on scope. The suite (toilet, basin, bath, shower) is rarely the biggest line. Tiling area, plumbing reroutes and labour usually move the number more.

The major cost forks: are you keeping the layout (cheap) or moving the toilet and shower (expensive), and are you tiling floor-to-ceiling (lots of tile, lots of labour) or splash-only (much less). A wet-room conversion adds £2,000–£5,000 over a standard refit because of the tanking and fall-to-drain work.

For the full breakdown by size, finish and layout choices, see what a bathroom renovation should actually cost in your area→.

Plastering

Plastering is one of those jobs where the headline rate looks simple and the actual quote varies enormously. Skim-coating a single room ranges from around £350 to £800 depending on room size, ceiling height and prep work. Re-skimming after stripping wallpaper or removing artex pushes the number up because of the disposal and bonding-coat time.

The cost driver people miss is what's behind the existing surface. Solid plaster on lath in a Victorian terrace is a different job to plasterboard in a 1980s build, and the plasterer's price reflects what they expect to find.

For the full breakdown including PVA, finish coats and disposal, see what plastering should cost for your room→.

Loft conversions

UK loft conversions span from around £15,000 (Velux conversion in a simple roofline) up to £75,000+ (full hip-to-gable plus dormer), with the 2026 UK average around £50,000 (HomeOwners Alliance 2026). Three big variables drive the price: roof type, head height (you legally need 2.2 metres at the highest point for habitable space under Building Regulations Approved Document B), and whether you're moving the staircase to reach the loft floor.

Most loft conversions fall under permitted development (no full planning application), but conservation areas, Article 4 directions, listed buildings and the volume rules (40 cubic metres for terraces, 50 for semis and detached) catch a surprising number of designs out. Before you cost a loft, you need to know whether you can legally do what you're planning.

To check your specific situation, see if your loft conversion needs planning permission→.

Extensions

Extensions are the highest-cost category most homeowners take on. UK ranges run from around £40,000 for a simple single-storey rear extension up to £150,000+ for a wraparound or double-storey, with the fit-out level moving the number more than the headline square metreage. London and the South East routinely run 25–35% higher than the UK average for the same scope (FMB 2024).

The hidden costs that catch homeowners out: party wall surveys if a neighbour disputes (£1,000–£3,000 per surveyor), structural engineer reports (£500–£1,500), Building Control fees, drainage diversions, scaffold across the project duration, and interim accommodation if you're moving out during the build.

For single-storey, double-storey, side-return and wraparound costs in detail, see our complete extension costs guide→.

Three quotes is the working minimum. Two doesn't tell you anything. A "spread" of two numbers is just two opinions. Three gives you the shape of the market for your specific job. Four is better if you can manage the time cost of arranging them.

What must be in a written quote:

Scope. A clear description of what's being done, room by room or task by task. "Kitchen refit" isn't a scope. "Remove existing units, supply and fit X model from Y supplier, retain existing flooring, retile splashback only" is a scope.

Line-by-line breakdown. Materials, labour, fixtures, contingency, VAT. If a quote says "£18,500 for a new kitchen" with no breakdown, you can't compare it to a quote that's broken out.

Exclusions. What's specifically not included. Decoration is the classic one (many builders quote up to but not including the painting). So is "making good" plasterwork after first-fix.

Payment terms. Stage payments tied to milestones, not dates. A reasonable structure on a £20,000 job: 10–20% deposit on contract signing, then payments at agreed milestones (first fix complete, second fix complete, snagging signed off). Avoid quotes that ask for 50% or more upfront. A large deposit moves the financial risk from the builder onto you, before any work has started.

VAT treatment. Most renovation work is 20% VAT. Energy-saving installations (insulation, heat pumps, solar, certain windows) currently attract 0% VAT until 31 March 2027, reverting to 5% from April 2027 (GOV.UK VAT Notice 708/6). Work on listed buildings and certain conversions can be zero-rated under specific conditions. The current GOV.UK rates are the authoritative source. Verify before signing.

Warranty. A warranty is the builder's commitment to come back and fix things at their own cost if work fails after completion. Most domestic renovation warranties run two to five years on the labour ("workmanship") and longer on individual fittings (often 10–25 years on boilers, windows and bathroom suites where the manufacturer underwrites it). The quote should state what's covered, for how long, and how to make a claim. A short workmanship warranty is fine if it's stated. A "no warranty" answer or a vague verbal "yeah, I'll come back if anything goes wrong" is a problem. Once final payment has cleared, that promise is worth what's written down.

Why the same job gets quoted at very different numbers. When two quotes are for genuinely the same scope with the same assumptions, the spread is typically 5–10% (HOA, FMB). When the scope is loosely defined or assumptions differ, you'll see 30% or more. The wider spread is what most homeowners actually encounter, because most quotes aren't truly like-for-like. Two builders looking at the same job make different assumptions about what's behind the walls, what level of "make good" they're including, and how busy they are this quarter.

Five mistakes account for most of the budget overruns we hear about.

Setting one big number instead of categories. When the budget is one figure, you can't see what's eating it until it's gone. Homeowners often discover this when they're 70% through the spend and only halfway through the job.

Skipping contingency entirely. Pre-1960s properties almost always surprise their owners. Joists, wiring, damp, drainage. Without contingency, those surprises eat the snagging budget or the new sofa or the holiday. With contingency, they stay manageable.

Forgetting the smaller fees. Skip hire across an eight-week project (£600–£1,200), scaffold (£800–£3,000+), Building Control fees (varies by local authority), structural engineer if you're moving anything load-bearing (£500–£1,500). 5–15% of total budget, easy to miss until the invoices arrive.

VAT confusion. Most renovation work is 20% VAT. Energy-saving installations (insulation, heat pumps, solar, certain windows) currently attract 0% VAT until 31 March 2027, reverting to 5% from April 2027 (GOV.UK VAT Notice 708/6). Work on listed buildings can be zero-rated under specific conditions. Verify the current bands on GOV.UK before signing a quote.

Treating the cheapest quote as the best quote. When three quotes come in, the cheapest is often the one missing the most. Decoration, "making good" plasterwork, waste disposal, longer warranty. Compare line-by-line, not headline-to-headline.