How Much Does It Cost to Renovate a House in the UK? 2026 Cost Guide
Renovating a house can cost from a modest five-figure sum to well over £100,000. The final price depends on the size and condition of the home, the work required and the finish you choose.
As a useful 2026 benchmark, Checkatrade puts the cost of renovating an average three-bedroom house at £43,530 to £110,350. Its midpoint is about £76,690, but real projects can sit well outside that range.
Your house renovation cost becomes much easier to plan when you split the project into separate jobs instead of relying on one national average.
Average house renovation cost in the UK in 2026
For an average three-bedroom home, roughly £45,000 to £110,000 is a sensible starting range for a major renovation in 2026.
A home that mainly needs decorating, flooring and a new kitchen could cost much less. A period property that needs rewiring, new plumbing, roof repairs, structural changes and premium finishes could exceed the upper end.
Where you live matters too. Labour and builder rates are often higher in London and the South East. HomeInspire's current home renovation guide uses a guide rate of about £1,000 to £1,400 per m² for internal work with layout changes in London and the South East.
Use national averages for early planning, not as a final quote. Accurate budgets need a clear scope of work and detailed prices from contractors.
Typical renovation costs by job
Several individual jobs can quickly move the total budget. Current 2026 UK cost guides give these useful starting points.
Typical costs:
New kitchen:
£10,000 to £30,000
New bathroom:
Around £6,000 to £15,000
Three-bedroom house rewire:
Around £4,500 to £8,000
New heating system:
£3,000 to £8,500
Replacement windows:
£2,500 to £8,000
New roof:
£6,500 to £18,000
Replastering walls:
£10,000 to £15,000
Wall removal:
£500 to £3,500
These are planning figures, not fixed prices. The finish can change them fast. A standard kitchen and a bespoke kitchen with premium appliances and custom joinery may take up the same space but have very different budgets.
Decide where quality matters most before fixing your total house renovation cost.
How much should you budget per square metre?
A price per square metre can help with large internal changes, extensions and full refurbishments.
Across the UK, HomeInspire’s guide uses roughly £1,300 per m² for a basic specification, £1,900 for mid-range and £2,500 to £3,000 for high-end work. In London and the South East, expect about £2,100 to £3,000 per m² for renovation work. A single-storey extension typically costs about £1,900 to £3,500 per m² in the same area, depending on specification.
Do not simply multiply one rate by the whole floor area. One project may leave the bedrooms almost untouched while spending heavily on the kitchen and ground floor.
It is often better to price the work by area and type. Separate the structure, heating, electrics, plumbing, kitchen, bathrooms, finishes and any extension. You can then see where the money is going and where savings are realistic.
What makes a house renovation more expensive?
Hidden work is often where budgets come under pressure.
Old wiring, poor plumbing, damp, roof problems and structural defects can use up money before you reach the finishes. Opening walls and floors can also uncover issues that were hard to confirm at the start.
Large structural changes add cost too. New openings, changes to floor levels and extensions may need an engineer, more labour and more complex building work.
Materials and fittings matter just as much. Bespoke joinery, natural stone, specialist glazing and premium bathroom fittings can raise the house renovation cost without making the project any larger.
A clear brief helps. Decide early where extra spend will improve the home and where a simpler choice will work just as well.
Remember fees and approvals
The builder's quote may not be the whole budget.
You could also need an architect or architectural designer, structural engineer, building control approval, planning permission or a party wall surveyor. HomeInspire's renovation guide suggests architect fees can often sit around 8% to 12% of build cost. Other design and approval fees need their own allowance.
A simple cosmetic update will not need the same input as a rear extension with major structural work. Check what your project needs before you commit the full budget to the build.
How much contingency should you allow?
A contingency should be in the budget from day one.
Checkatrade recommends adding around 10% to 15% for unexpected renovation costs. An older home or a project with lots of unknowns may need a larger safety margin.
Keep this money for real surprises, not upgrades you already want.
If your total budget is £80,000 and you hold back £12,000, plan the known work around £68,000. You then have room to deal with hidden defects without immediately cutting the kitchen or other important features.
Do not overlook VAT
Most work on an existing occupied home is normally subject to standard-rate VAT when it is supplied by a VAT-registered contractor.
There are exceptions. HMRC says qualifying renovation or alteration work on certain homes that have been empty for at least two years can qualify for the reduced 5% rate when the rules are met.
Do not assume this applies to your project. The rules depend on the home, its recent use and the work being supplied. Check HMRC's current guidance or take professional tax advice before using a reduced VAT rate in your budget.
How to keep your house renovation cost under control
Good cost control starts before the builders arrive.
Set the scope and make key design choices before asking contractors to quote. Prices are easier to compare when each builder receives the same drawings, details and list of work.
Spend first on things that are costly to change later, such as the structure, insulation, wiring, plumbing and layout. Decorative upgrades are easier to adjust if the budget gets tight.
Try to avoid changing the brief during the build. Even small changes can add materials, labour and delays.
HomeInspire's Ultimate Home Renovation Planner helps homeowners estimate costs, compare builder quotes and track spending as the project moves forward.
Build your budget around the home you actually have
A realistic house renovation cost is not one figure copied from an online calculator. It should reflect your home's condition, the work you want to do, your location and the finish you expect.
For 2026, £43,530 to £110,350 is a useful benchmark for an average three-bedroom UK renovation. Your own budget may be lower or much higher.
Before work begins, assess the property, define the scope, get detailed quotes and keep a proper contingency. HomeInspire's free home renovation guide covers budgeting, planning and finding contractors, while its renovation resources provide practical tools for managing a project.
Getting those decisions right early gives you a better chance of protecting both the budget and the design choices that matter most.