Planning a home renovation without a solid budget is the fastest way to run out of money halfway through a kitchen refit. We see it happen far too often. At Buon Construction, we’ve worked with UK homeowners on hundreds of projects from single-room refreshes in terraced houses to full structural overhauls of Victorian semis and the single biggest predictor of a smooth renovation is getting the budget right before the first tool is picked up.
This guide gives you everything you need: realistic UK cost figures for 2026, room-by-room breakdowns, a clear list of hidden costs that blindside most homeowners, and a practical framework for building a home renovation budget that holds.
Table of Contents
What Is a Realistic Home Renovation Budget in the UK?
Before diving into specifics, it helps to understand what “renovation” actually covers because the word gets stretched to mean everything from replacing a bathroom suite to gutting an entire property.
A rough-but-useful starting rule: budget between £1,000 and £2,500 per square metre for a comprehensive UK renovation. At the lower end, you’re looking at cosmetic updates, new flooring, decoration, fixtures. At the upper end, you’re rewiring, replumbing, opening up layouts, and fitting premium finishes throughout.
For a typical three-bedroom semi-detached house (around 90–120m²), that translates to:
| Renovation Scope | Estimated Cost Range |
| Cosmetic refresh (decorating, new fixtures) | £30,000 – £60,000 |
| Mid-level renovation (new kitchen, bathrooms, partial rewire) | £60,000 – £100,000 |
| Full structural renovation (rewire, replumb, new heating, layout changes) | £100,000 – £180,000+ |
| Home Extension or loft conversion (additional to above) | £40,000 – £100,000+ |
These figures align with what our teams at Buon Construction see quoted and delivered across the UK in 2026. London and the South East sit at the higher end; the North, Scotland, and Wales generally come in lower, sometimes by 15–25%.
Step 1: Define the Scope Before You Set a Number
This sounds obvious, but it’s where most budgets go wrong. Homeowners decide on a figure say £40,000 and then try to fit their wishes into it, rather than costing what they actually want and then adjusting.
Start by answering these questions honestly:
- Which rooms are being renovated? Full house or targeted rooms?
- Are you changing any layouts? Removing walls, moving the kitchen, adding an en suite all of these add significant cost.
- What’s the current condition of the property? An older Victorian property with original wiring and plumbing will cost substantially more than a post-1990 house that needs only cosmetic work.
- What finish level are you aiming for? Budget specification (functional, durable, practical) vs. premium specification (luxury materials, bespoke joinery, high-end appliances) can double or even triple the same project’s cost.
Only once you’ve answered these questions can you begin to build a meaningful home renovation budget.
Step 2: Room-by-Room Cost Breakdown
Here’s what you can realistically expect to pay for individual rooms across the UK in 2026. These are working ranges, not guarantees to always get three written quotes before committing.
Kitchen Renovation Costs
The kitchen is consistently the most expensive room per square metre and the one with the biggest variability based on specification.
| Specification Level | Estimated Cost |
| Budget (flat-pack units, laminate worktops) | £8,000 – £15,000 |
| Mid-range (rigid-built units, quartz worktops, integrated appliances) | £15,000 – £30,000 |
| Premium (bespoke cabinetry, stone worktops, high-end appliances) | £30,000 – £60,000+ |
What drives kitchen costs up: changing the layout, moving plumbing or gas supplies, adding an island, under-floor heating, structural changes like removing walls.
What keeps costs down: keeping the existing layout, sourcing appliances separately, using a Buon Construction-recommended supplier to avoid retail markups.
Bathroom Renovation Costs
Bathrooms are compact but infrastructure-heavy. Plumbing, waterproofing, ventilation, and electrical work for electric showers all add up quickly.
| Specification Level | Estimated Cost |
| Budget (basic suite, standard tiles, minimal plumbing changes) | £5,000 – £9,000 |
| Mid-range (freestanding bath or walk-in shower, tiled finish) | £9,000 – £18,000 |
| Premium (bespoke wet room, underfloor heating, luxury fittings) | £18,000 – £35,000+ |
En suite additions typically start around £7,000 and climb quickly depending on whether new plumbing runs are needed.
Living Room Renovation Costs
Living rooms are generally the most affordable to renovate because they don’t carry the plumbing and electrical load of kitchens and bathrooms.
| Scope | Estimated Cost |
| Decorating, flooring, new lighting | £3,000 – £8,000 |
| Feature fireplace, alcove joinery, full refit | £8,000 – £20,000 |
| Structural changes (removing walls, RSJ installation) | £15,000 – £35,000+ |
Bedroom Renovation Costs
| Scope | Estimated Cost |
| Decorating and new flooring | £1,500 – £4,000 |
| Built-in wardrobes added | £2,000 – £8,000 |
| Full refit with new windows | £5,000 – £15,000 |
Whole-House Systems
These are often the most overlooked costs in a home renovation budget and the most necessary, especially in older UK properties.
| System | Estimated Cost |
| Full rewire (30+ year-old wiring) | £3,000 – £7,000 |
| New plumbing throughout | £2,500 – £6,000 |
| Boiler replacement + radiator system | £4,000 – £9,000 |
| Roof repair / re-roof (semi-detached) | £8,000 – £18,000 |
| Damp-proofing | £2,000 – £6,000 |
| Loft insulation + draught-proofing | £800 – £2,500 |
If your property is pre-1970, budget for at least some of these, even if surveys suggest they’re “in reasonable condition.” Older systems have a habit of failing once work on surrounding areas begins.
Step 3: Add Your Contingency Fund
This is non-negotiable. Every experienced construction team in the UK including ours at Buon Construction will tell you the same thing: set aside 15–20% of your total project budget as a contingency fund.
Why 15–20%? Because in UK residential renovation, hidden problems are the rule, not the exception:
- Damp discovered behind a bathroom wall that looked fine during survey
- Asbestos-containing materials in pre-1985 properties (artex ceilings, floor tiles, pipe lagging)
- Structural issues only visible once floors or ceilings are opened up
- Outdated wiring that fails inspection partway through
- Supplier lead times extending project duration, adding to labour costs
According to RICS data, around 73% of UK renovations exceed their initial budget by at least 20%. The ones that don’t tend to be projects where the homeowner built that buffer in from the start.
Contingency example:
Total project quote: £60,000
15% contingency fund: £9,000
Total budget to set aside: £69,000
If you don’t use the contingency, wonderful. Put it toward the garden or a new piece of furniture. But never start a renovation without it.
Step 4: Factor In the Hidden Costs Most People Miss
Beyond rooms and systems, there’s a long list of costs that regularly blindside homeowners. These aren’t extras, they’re legitimate project costs that belong in your home renovation budget from day one.
Planning Permission & Building Regulations
Not all renovations need planning permission, but many do particularly extensions, loft conversions, changes to listed buildings, and projects in conservation areas. Fees vary by local authority, but budget:
- Planning application fee: approximately £258 for a householder application in England (2026 rates)
- Building regulations fee: typically £500–£1,500 depending on project scope
- Architect or planning consultant fees: £1,500–£5,000+ for drawings and submissions
Structural Engineer Fees
Any project involving wall removal, RSJs (rolled steel joists), loft conversions, or extensions will need a structural engineer’s sign-off. Budget £500–£1,500 for a structural engineer’s report and calculations.
Skip Hire & Waste Removal
A kitchen renovation alone can fill a 12-yard skip. For a whole-house project, you may need multiple skips over several weeks.
- Skip hire: £280–£450 per week depending on size and location
- Grab lorry hire: £250–£400 per load
Temporary Accommodation
If you’re doing a full renovation, living on site during major structural work is rarely practical and sometimes impossible when water or electricity is isolated. Budget £100–£150 per night for nearby accommodation, or factor in a month’s rental if the project is large-scale.
Professional Fees You Didn’t Expect
- Party wall agreement (shared walls with neighbours): £700–£2,000+
- Asbestos survey: £200–£400 (required pre-demolition in pre-1985 properties)
- Energy Performance Certificate (EPC) update post-renovation: £60–£120
- Storage for furniture during renovation: £50–£150/month
VAT
Most renovation work by VAT-registered contractors is charged at 20% VAT. Some specific works carry a reduced 5% rate, notably works on properties that have been empty for 10+ years, and certain energy-efficiency improvements. Always clarify VAT treatment when comparing quotes; a quote that doesn’t mention VAT may look cheaper but isn’t.
Step 5: Understanding What Drives Costs Up (and Down)
Factors That Increase Your Home Renovation Budget
Location: London and the South East carry a labour premium of 20–30% over the national average. Buon Construction operates across the UK, and we see this consistently.
Property age: Victorian and Edwardian properties (pre-1919) typically cost 20–30% more to renovate than modern homes. They often have solid walls requiring specialist insulation solutions, original features that need careful preservation, and legacy systems throughout.
Changing layouts: Moving a kitchen, removing a load-bearing wall, or relocating a bathroom all require structural engineering input and significantly more labour than like-for-like replacements.
Heritage and conservation constraints: Listed buildings and properties in conservation areas may require specific materials, specialist contractors, and longer planning timelines all of which add cost.
Specification upgrades mid-project: This is one of the most common budget-killers. A homeowner starts with a mid-range kitchen spec, sees the space taking shape, and upgrades to stone worktops and a range cooker. Every upgrade mid-build costs more than it would have in the original quote.
Factors That Help Keep Costs Down
Clear scope from the start: Projects with a well-defined brief and a signed-off design before breaking ground have far fewer costly changes.
Keeping layouts intact: If you can achieve your goals without moving plumbing stacks or load-bearing walls, you’ll save thousands.
Phased renovation: If budget is limited, phasing the project intelligently completing ground-floor work in year one and bedrooms in year two costs around 10–15% more overall (due to repeated mobilisation) but reduces financial exposure at any one time.
Choosing a contractor with transparent pricing: Fixed-price proposals, as opposed to day-rate arrangements, give you certainty. Always get a written contract with a clear payment schedule tied to milestones, not arbitrary dates.
Step 6: How to Finance Your Home Renovation Budget
Most UK homeowners fund renovation through one or more of the following:
Savings: The most straightforward option. No interest, no obligation.
Remortgaging: If you have equity in your property, releasing it via a remortgage can fund significant renovation at relatively low interest rates. Speak to a mortgage broker before starting, not after.
Home improvement loan (personal loan): Suitable for smaller projects (under £25,000). Compare APRs carefully, rates vary significantly between lenders.
0% purchase credit card: Useful for buying materials and appliances if you can pay off the balance within the interest-free period. Not suitable for labour costs.
Government grants and schemes: Certain energy-efficiency improvements including heat pump installations, insulation, and solar panels may qualify for support under current UK government schemes. Check the GOV.UK website for the latest eligibility criteria, as these programmes change regularly.
Equity release (for over-55s): May be appropriate in specific circumstances. Always take independent financial advice.
Choosing the Right Contractor: What Your Budget Is Really Paying For
A low quote is not always a saving. This is worth saying plainly, because we’ve been called in to fix projects where the cheapest contractor caused more damage than the original renovation was worth.
When comparing quotes, look for:
- A detailed, itemised breakdown not just a lump sum
- VAT clearly stated (included or excluded)
- A payment schedule tied to milestones, not arbitrary dates
- Evidence of public liability insurance and relevant trade accreditations (Gas Safe for gas work, NICEIC or NAPIT for electrical work, FMB membership as a general quality marker)
- References from recent comparable projects and follow them up
At Buon Construction, we provide written proposals with full cost breakdowns before any work begins. You shouldn’t accept anything less from any contractor.
Home Renovation Budget: A Practical Planning Checklist
Before you appoint a contractor, work through this checklist:
- Scope defined and written down
- Three written quotes obtained and compared (like-for-like)
- Planning permission requirements checked with your local authority
- Building regulations requirements understood
- VAT position confirmed (20% or reduced rate?)
- Contingency fund of 15–20% set aside
- Hidden costs (skip hire, accommodation, fees) included in total budget
- Financing arrangement confirmed, if applicable
- Written contract agreed with payment schedule before work starts
- Contractor insurance and accreditations verified
Ready to Start Planning Your Renovation?
At Buon Construction, we work with homeowners across the UK to plan and deliver renovation projects with transparent pricing, detailed written proposals, and no hidden surprises. Whether you’re planning a kitchen overhaul, a full property refurbishment, or anything in between, our team will give you a realistic budget and a clear plan from the first conversation.
Frequently Asked Questions About Home Renovation Budgets
How much does a full house renovation cost in the UK?
For a typical three-bedroom house, a full renovation in the UK costs between £75,000 and £180,000 depending on scope, location, and specification level. Cosmetic updates sit at the lower end; full structural renovations with premium finishes reach the higher end. Always budget a 15–20% contingency on top of contractor quotes.
What is the most expensive part of a home renovation?
Kitchens and bathrooms consistently represent the highest cost per square metre because of the plumbing, electrical, and structural work involved. Structural changes removing load-bearing walls, adding extensions, loft conversions are typically the single largest individual cost items.
Should I include a contingency fund in my renovation budget?
Yes, without exception. We recommend 15–20% of the total project cost as a contingency. Hidden problems damp, outdated wiring, structural issues are extremely common in UK properties and rarely visible before work begins.
How can I reduce my home renovation costs without sacrificing quality?
Keep your layout intact wherever possible (avoid moving plumbing or structural walls), choose a mid-range specification rather than premium, source appliances and materials independently, phase the project if budget is tight, and agree to a fixed-price contract upfront so there are no surprises.
Do I need planning permission to renovate my house in the UK?
Not always. Interior renovations generally don’t need planning permission, but extensions, loft conversions, changes to listed buildings, or projects in conservation areas usually do. Always check with your local planning authority before starting. Building regulations approval is separate and often required even for interior structural work.
How long does a home renovation take?
A single-room renovation (kitchen or bathroom) typically takes 2–6 weeks. A full house renovation can take anywhere from 3 months to over a year depending on scope, contractor availability, and planning processes. Structural work, extensions, and listed building projects consistently take longer than homeowners expect.
