Add 40–55%: London flat refurbishment budgets 2026, leasehold fees
A cosmetic refresh of a London flat typically lands between £8,000 and £20,000, a partial kitchen or bathroom refurbishment between £20,000 and £45,000, and a full flat refurbishment between £33,000 and £80,000 or more once VAT, fees and contingency are included. The three factors that move these ranges the most are the specification you choose, how difficult the flat is to access and work in, and the statutory or leasehold costs your lease and borough impose.
TL;DR:
A realistic all-in budget for London flat refurbishments is typically 40% to 55% higher than the contractor’s build quote due to VAT, professional fees, and contingency costs.
Kitchen and bathroom costs heavily influence total expenses, with high-spec finishes exceeding £35,000 for kitchens and £25,000 for bathrooms.
Leasehold flats require landlord’s consent, often costing £15,000 to £40,000 in professional fees and adding several weeks of approval time, which cannot be skipped.
Comparing per-square-meter costs can be misleading, especially for smaller flats, as fixed costs like scaffolding and management are spread unevenly.
Planning and Building Regulations differ, with internal works typically only needing Building Regulations approval, but leasehold and borough constraints can add significant procedural costs.
Table of Contents
How to interpret London build figures and convert them to all-in budgets
Most quotes you see from contractors and online calculators describe the build cost: labour, materials and site overheads for the work itself. That figure is not what lands on your bank statement. The all-in cost, the number that actually matters for budgeting, adds VAT, professional fees and a contingency buffer on top.
For a typical London flat refurbishment, the standard additions are fairly consistent across the industry:
VAT at 20% on most residential refurbishment work, with narrow exceptions for certain conversions
Professional fees of 10% to 18% of build cost when an architect, structural engineer or party wall surveyor is involved
A contingency allowance of 10% to 15%, held back for unforeseen issues once walls and floors are opened up
Nearly a fifth of a typical build quote disappears into fees and VAT before contingency is even added. Industry guidance on London building costs shows that practitioners routinely add 10% to 18% for professional fees and 20% VAT on top of a bare build figure, then hold a further 10% to 20% in reserve, with 15% considered sensible for older London stock.
Take a worked example: a contractor quotes £50,000 for the build. Add a 15% contingency on the build cost (£7,500) and your realistic all-in budget is closer to £73,500, nearly 50% above the headline figure.
Per-square-metre pricing, often used to compare quotes quickly, can mislead badly on smaller flats. A one-bedroom conversion and a four-bedroom house share many of the same fixed costs, skip hire, scaffolding, site protection, management time, so the smaller property absorbs a much higher cost per square metre. Our guide to house refurbishment costs in London explains this distortion in more detail and why comparing flats against house-based benchmarks rarely gives a fair picture.
Detailed cost ranges by room and scope for London flats
Breaking a refurbishment down by room gives you a far more reliable budget than a single headline figure, because kitchens and bathrooms carry a disproportionate share of total cost relative to their floor area.
A basic kitchen refit, flat-pack units, laminate worktop, standard appliances, typically runs £8,000 to £15,000. A mid-range kitchen with solid surface worktops and integrated appliances moves to £15,000 to £28,000, while a high-spec kitchen with bespoke joinery, stone worktops and premium appliances can exceed £35,000. These figures generally exclude structural work such as removing a wall to create an open-plan layout.
Bathrooms follow a similar pattern. A basic bathroom refit, including a new suite, standard tiling and re-plumbing, usually costs £6,000 to £10,000. A mid-range refurbishment with better sanitaryware, full tiling and proper waterproofing (tanking) sits at £10,000 to £18,000, and a high-spec bathroom with underfloor heating, walk-in showers and natural stone tiling can reach £25,000 or more.
Beyond kitchens and bathrooms, the larger line items that shape a full refurbishment budget include:
A full rewire for a typical flat: £4,000 to £8,000, depending on the number of circuits and consumer unit location
Boiler replacement: £2,000 to £4,500 for a standard combi boiler, including flue work
Replacement windows: £500 to £1,200 per window depending on frame material and glazing specification
New flooring throughout: £3,000 to £9,000 depending on whether you choose engineered timber or carpet
Plastering and full redecoration: £4,000 to £9,000 for a typical two-bedroom flat
Putting these together gives directional totals for complete refurbishments. A studio or one-bedroom flat generally lands between £33,000 and £50,000 for a full refurbishment. A two-bedroom flat typically runs £48,000 to £70,000, and a three-bedroom flat can reach £65,000 to £95,000 or more where layout changes and higher specifications are involved.
Statutory, leasehold and third-party costs you cannot skip
Most London flats are leasehold, and that single fact adds a layer of cost and approval that house renovations rarely face. Landlord’s consent, often called a licence to alter, is entirely separate from planning permission and building control. Your lease will usually require written consent from the freeholder before you touch internal walls, flooring, plumbing routes or anything affecting the building’s structure or services.
Councils and freeholders charge for processing these applications. Based on published leasehold alterations policy guidance, typical bands include minor alteration applications, major alteration applications, floor plan production (where required), and legal services for a licence or deed of variation, with varying charges depending on the project.
Professional fees for the broader approvals process, covering architects, structural engineers and party wall surveyors, can total £15,000 to £40,000 or more on complex projects involving structural changes or extensions. Securing consent takes time: expect several weeks for a straightforward application and considerably longer where the freeholder requires full drawings or a structural report.
Skipping this step carries real risk. A First-tier Tribunal (Property Chamber) determination found that a leaseholder who made alterations without a prior licence was ordered to reinstate the changes, underlining why proper applications and professional drawings matter before work starts, not after.
A leaseholder who altered their flat without the required consent was ordered to reinstate the original layout, despite the work already being complete.
How to prepare a tender-ready brief and compare quotes properly
A vague brief produces vague quotes, and vague quotes turn into expensive variations once work is underway. The single best way to protect your budget is to give every contractor the same detailed information before they price the job.
A tender-ready brief should specify:
Exact finishes and allowances for sanitaryware, tiles, flooring and kitchen units, with a price per item where possible
Clear exclusions, stating what is not included, such as furniture, window treatments or appliances
Provisional sums for any item not yet finalised, such as a bespoke staircase or specialist lighting
Programme assumptions, including access hours, lift availability and any restrictions from the managing agent
Our refurbishment checklist for London homeowners sets out typical trade packages and allowances in more depth, which is useful groundwork before you approach contractors.
When comparing quotes, check three things in order: that each contractor has priced against the same specification, that VAT treatment is stated clearly, and that payment terms are staged against milestones rather than front-loaded. Red flags worth walking away from include a demand for a large upfront deposit, no written contract, and a contractor who cannot confirm adequate public liability insurance.
Pro Tip: Ask every contractor for a fixed-price quote rather than an estimate, and insist on a retention of 2.5% to 5% held until snagging is complete.
VAT, contingency and simple rules to finalise your budget
Most refurbishment work on an existing residential flat carries VAT at the standard 20% rate, though certain conversions of non-residential buildings can qualify for a reduced rate. Check your specific project against current GOV.UK guidance rather than assuming an exception applies.
Adding fees and contingency typically increases a bare build quote by 40% to 55% to reach a realistic all-in figure. On a £40,000 build quote, 20% VAT adds £8,000, professional fees at 12% add £4,800, and a 15% contingency adds £6,000, bringing the realistic all-in budget to roughly £58,800 against a £40,000 headline price, a pattern consistent with triangulated London cost guidance.
Practitioner guidance on mobilisation and avoiding overruns
Director-led project management and in-house trades cut down the coordination costs that drive many overruns. When one team manages electricians, plumbers and decorators directly, rather than a chain of subcontractors reporting to different parties, scheduling conflicts and finger-pointing over defects both reduce.
Operational detail matters as much as the trade work itself. Protecting communal hallways and lift lobbies, scheduling deliveries around building access hours, keeping neighbours informed, and coordinating any party wall survey early in the programme all prevent the small disputes that stall a site for days at a time.
Agreeing a delivery schedule with the building’s managing agent before work starts
Protecting shared stairwells and lift interiors for the full duration of the project
Briefing neighbours ahead of any noisy or disruptive phase, particularly demolition
Coordinating loft conversion or extension surveys, where relevant, alongside the main refurbishment programme
If your project includes a loft conversion alongside the refurbishment, building this coordination into the programme from day one avoids costly resequencing later.
Impact of flat size, age and condition on refurbishment costs
Smaller flats absorb fixed costs, skip hire, scaffolding, site setup, less efficiently than larger ones, which pushes their effective cost per square metre higher even when the total spend is lower. A one-bedroom flat and a three-bedroom flat share many of the same mobilisation costs, so the smaller property often shows a steeper headline rate.
Age and condition matter just as much as size. A Victorian conversion flat with original wiring, lead pipework or lath-and-plaster ceilings generally costs more to refurbish than a 1990s purpose-built flat in good condition, because hidden issues surface once walls and floors are opened. Older buildings also more often need asbestos checks before works that disturb textured coatings or old pipe lagging.
Condition also affects contingency sizing. A flat that has not been touched in several decades justifies holding contingency nearer the top of the 10% to 20% range, since uncovering outdated electrics or damp behind plaster is common once work begins. A recently refurbished flat needing only a cosmetic update can usually work with a smaller reserve.
Building regulations and borough planning permissions
Building Regulations and planning permission are not the same thing, and conflating them is one of the most common budgeting mistakes homeowners make. Planning permission concerns whether you are allowed to change a building’s use or external appearance, while Building Regulations concern whether the work itself is safe and compliant, covering structure, fire safety, insulation and electrical installations.
Most internal refurbishment work in an existing flat, new kitchen, new bathroom, rewiring, does not need planning permission. It does, however, usually need to comply with Building Regulations, and certain electrical work falls under Approved Document P, which sets the safety standards electricians and builders must follow.
Each London borough applies its own planning policies, particularly around conservation areas, listed buildings and permitted development rights, so a change that is straightforward in one borough may require a full application in another. Building Control sign-off, whether through your local authority or an approved inspector, is a separate cost from planning and should be budgeted into professional fees rather than assumed to be included in a contractor’s build price.
Typical materials and labour rates specific to London
London labour rates run noticeably above the national average, reflecting both demand and the higher cost of living for skilled trades working in the capital. Electricians, plumbers and experienced carpenters typically command day rates at the upper end of UK ranges, and this is reflected in the per-room costs set out earlier in this guide.
Materials prices themselves do not vary dramatically by region for standard products, a bag of plaster or a length of copper pipe costs roughly the same whether bought in Manchester or Fulham. What changes in London is delivery access, storage and waste logistics: narrow streets, resident parking restrictions and limited storage in flats all add time and therefore cost to every trade.
Specification choice remains the biggest lever within materials cost. Choosing mid-range sanitaryware over premium European brands, or engineered timber over imported hardwood flooring, can shift a room budget by thousands of pounds without changing the scope of work at all.
Leasehold versus freehold: how costs diverge
The overwhelming majority of London flats are leasehold, and that status adds cost layers a freehold house renovation never encounters. Leasehold flats typically require landlord’s consent for structural changes, internal alterations affecting demised versus common parts, and sometimes even cosmetic work specified in the lease.
Freehold flats, usually found in older converted houses split into two or three units with shared freehold ownership, can still carry similar consent requirements if other leaseholders or a management company have an interest in the building. The practical difference is procedural rather than financial in scale: leasehold consent processes add defined fees and waiting periods, as set out earlier, while freehold arrangements depend more on individual agreements between owners.
Either way, a deed of variation may be required if the refurbishment changes a flat’s registered floor plan, and skipping this step can complicate a future sale or mortgage application even when the physical work itself was done properly.
Waste removal and site cleanup costs in London
Skip hire and waste removal are often underestimated in a first-pass budget, yet London’s access restrictions make this line item more expensive than in most of the country. A standard builder’s skip suitable for a full flat refurbishment typically costs several hundred pounds for hire and collection, with costs rising where a licence is needed to place a skip on a public road.
Many London buildings, particularly those without ground-floor access or private parking, require waste to be bagged and carried out rather than skipped on site, which adds labour time. Where a flat sits several floors up without a working lift during works, waste removal costs can rise further simply due to the extra hours needed to carry materials down manually.
Budgeting £500 to £1,500 for waste removal and site cleanup on a typical full flat refurbishment is a reasonable starting point, with the figure moving toward the higher end for larger properties or buildings with restricted access.
Insurance and warranty considerations during refurbishment
Contract works insurance protects the project itself, covering damage to materials and partly completed work, and should sit alongside your existing buildings insurance rather than replace it. Confirming your contractor holds adequate public liability insurance, and asking to see the certificate, is a basic step that costs you nothing but protects you if something goes wrong on site.
Workmanship warranties vary by contractor and by trade, and it is worth clarifying in writing what is covered and for how long before signing a contract. Insurance-backed warranties, where a third party underwrites the guarantee rather than relying solely on the contractor’s own promise, offer stronger protection if a company ceases trading after the work is complete.
These costs rarely appear as a separate line in a quote, but they should factor into your contingency thinking: a flat refurbishment without adequate cover carries a financial risk that a modest insurance premium largely removes.
Should you phase the work or run a single contract?
Phasing makes sense when cashflow is tight or when you need to stay living in the flat and cannot vacate every room at once. A single contract is usually cheaper overall, since mobilisation costs, scaffolding and management time are spread across one continuous programme rather than repeated for each phase.
Prioritise structural and service work, rewiring, plumbing, any wall removal, before cosmetic finishes, since reopening finished surfaces later wastes money. Factor in your managing agent’s rules on noise, access and working hours when deciding how to sequence the project.
— Mateja
How Tenen Ltd delivers a director-led refurbishment across West and Central London
Coordinating a kitchen fitter, an electrician, a plumber and a decorator across separate contracts is where most budgets quietly slip. Some contractors run full property refurbishments, kitchen and bathroom refits, and loft conversions with director-led project management and in-house trades, so one team carries responsibility for the programme from start to finish.
Such a single point of accountability can mean fixed quotes with no hidden costs, insurance-backed workmanship, and a project manager who answers for delays rather than passing blame along a subcontractor chain. If you are weighing up a full flat refurbishment in Fulham, Chelsea, Kensington, Chiswick, Hammersmith or Notting Hill, get a detailed, itemised quote from our full property refurbishment service before you commit to a budget.
FAQ
Is £100,000 enough to refurbish a flat in London?
Yes, a full refurbishment of most London flats, including two or three-bedroom properties with high-spec kitchens and bathrooms, can require tens of thousands to low six figures depending on scope. For most studio, one-bedroom and two-bedroom flats, the budget should leave room for a sensible contingency on top of the core works.
What are the typical costs of refurbishment in the UK?
Costs vary by scope, but a full flat refurbishment commonly runs from £33,000 to £80,000 or more once VAT, professional fees and contingency are included. Partial refurbishments focused on a kitchen or bathroom typically sit lower, in the £20,000 to £45,000 range.
Is £30,000 enough to renovate a flat?
A budget around £30,000 may cover partial refurbishment projects, such as a new kitchen or bathroom with some redecoration, rather than a full strip-out of a flat. For a complete refurbishment including rewiring, new flooring and full redecoration, this amount is usually tight for anything beyond a studio or small one-bedroom flat.
Is £50,000 enough to renovate a flat?
£50,000 is realistic for a full refurbishment of a studio or one-bedroom London flat at a mid-range specification, based on the directional totals set out earlier in this guide. For a two or three-bedroom flat, £50,000 is more likely to cover a partial refurbishment with some structural or electrical work included rather than a complete overhaul.
Do I need landlord’s consent for a flat refurbishment in London?
Most leasehold flats require written landlord’s consent, often called a licence to alter, for internal and structural changes, separate from any planning permission or Building Control approval. Checking your lease and landlord consent requirements before work starts avoids the risk of being ordered to reinstate unauthorised changes later.
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