Flat Renovation Cost UK 2026: What a Flat Renovation Actually Costs
Quick Answer
Flat renovation costs UK range from £5,000–15,000 for a cosmetic refresh, £20,000–50,000 for a full renovation, and £40,000–80,000+ for a full gut-and-reconfigure. Leasehold flats require freeholder consent for structural changes, wet rooms, and alterations to building fabric. Cost per m² is typically 10–20% higher for flats than equivalent houses due to access restrictions and limited working hours.
Renovating a flat in the UK is a different proposition to renovating a house. The physics of the work — what you're doing to the property — is similar. But the context is different: leasehold ownership introduces consent requirements and restrictions that don't apply to freehold houses, working in a multi-occupancy building means access constraints and working-hours limitations, and the per-m² cost is typically slightly higher as a result.
This guide covers flat renovation cost in the UK for 2026 across three main scope levels — cosmetic refresh, full renovation, and full gut and reconfiguration — with a breakdown by flat type (studio, 1-bed, 2-bed), and practical guidance on the leasehold consent requirements that catch out many buyers and investors. The buy-to-let economics of flat renovation are also covered: what a renovation actually yields in rental uplift and capital value increase.
Flat Renovation Cost Overview
Flat renovation costs in 2026 across the three main scope levels:
| Scope | Cost Range | What It Includes |
|---|---|---|
| Cosmetic refresh | £5,000–£15,000 | Painting and decorating throughout, new flooring, new light fittings, minor joinery repairs, cosmetic kitchen and bathroom updates |
| Full renovation | £20,000–£50,000+ | New kitchen, new bathroom, replastering throughout, new flooring, updated electrics (consumer unit upgrade, additional circuits), new boiler or heating controls, decoration |
| Full gut and reconfigure | £40,000–£80,000+ | Strip back to structure, full rewire, new plumbing and heating system, layout reconfiguration, new kitchen and bathrooms, full plaster, flooring and finish throughout |
These are total project costs for a typical 1-bed flat (40–55m²). For a 2-bed flat (60–80m²), scale up approximately 30–40%. For London, add 20–35% across all categories. The per-m² cost for flat renovation is typically 10–20% higher than equivalent house work due to access, working-hours and logistics factors covered below.
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Try Free — No Card NeededFlat Renovation Cost by Flat Type
The size of the flat is the primary driver of renovation cost within any given scope. Here is how costs break down across the three main flat types for a full renovation (new kitchen, new bathroom, replastering, new flooring and decoration throughout):
| Flat Type | Typical Floor Area | Cosmetic Refresh | Full Renovation | Full Gut |
|---|---|---|---|---|
| Studio | 20–35m² | £3,500–£8,000 | £12,000–£25,000 | £22,000–£40,000 |
| 1-bedroom | 40–55m² | £5,000–£15,000 | £20,000–£40,000 | £35,000–£60,000 |
| 2-bedroom | 60–80m² | £8,000–£20,000 | £28,000–£55,000 | £45,000–£80,000+ |
Studio Flats
The small floor area of a studio makes the per-m² cost disproportionately high — fixed costs (scaffolding, access, mobilisation, plant) don't scale down proportionally with floor area. A full renovation of a 30m² studio at £15,000 works out at £500/m², which is well above the per-m² rate for a larger flat doing the same scope of work. This is a consistent feature of small-space renovations and worth factoring into your viability calculation if you're acquiring studio flats as investment property.
2-Bedroom Flats
Two-bedroom flats offer better economies of scale — fixed project costs spread across a larger area, reducing the effective per-m² rate. A two-bedroom flat renovation in good condition targeting a mid-market rental specification (£30,000–40,000) typically yields the best balance of renovation cost to rental income uplift in the UK market.
Leasehold Considerations: What You Need Permission For
The majority of flats in the UK are held on a leasehold basis — you own the interior of the flat for the term of the lease, but the freehold of the building is held by a landlord or a management company. This means the lease document governs what you can and cannot do to the property, and many leases require consent from the freeholder or managing agent before specific categories of work can begin.
Work That Typically Does Not Require Consent
- Internal decoration — painting, wallpapering
- Like-for-like flooring replacement where the lease permits hard floors (check this — many leases require carpet in upper-floor flats to protect neighbours from noise)
- Replacement of kitchen units in the same position without moving plumbing
- Replacement of bathroom sanitaryware in the same position
- New light fittings and switch plates
Work That Typically Requires Freeholder Consent
- Any structural alterations — removing or adding internal walls, even non-load-bearing partitions in some leases
- Wet rooms or shower room additions — anything that introduces new water to areas not previously wet
- Changes to the building fabric — this can include replacing windows (even like-for-like) in some leases
- Changes to communal heating, hot water or utilities where the flat connects to a shared system
- Running new soil stacks or drainage that penetrates floor or ceiling structures
- Any work involving the external structure of the building
The specific requirements vary by lease — some are more restrictive than others, and some managing agents require a formal licence to alter even for relatively minor works. The process of obtaining consent typically involves submitting drawings and a specification, paying a consent fee (£500–2,500+), and potentially providing an undertaking to reinstate the property at the end of the lease. Build this into your programme — consent can take 4–12 weeks and cannot be assumed to be automatic.
Carrying out unauthorised structural work in a leasehold flat constitutes a breach of lease. The freeholder has legal remedies including requiring reinstatement at the leaseholder's cost. This is not a theoretical risk — it is enforced, particularly on sale when a solicitor's enquiries will surface any unlicensed alterations.
Why Flat Renovation Costs More Per m² Than House Renovation
The same scope of work in a flat consistently costs more per m² than in a house. The reasons are structural — they stem from the nature of working in a multi-occupancy building rather than from the size or condition of the flat itself.
Access and Materials Handling
In a house, a builder can park a van close to the front door, wheel materials through and get to work. In a flat — particularly in a Victorian conversion or a 1960s block — materials need to be carried up stairwells, squeezed through narrow corridors, and sometimes brought up in lifts with size and weight restrictions. Skip hire on the street requires council permits in most London boroughs. Removing construction waste from a second-floor flat takes longer and costs more than removing it from a ground-floor house. These logistics add cost.
Working Hours Restrictions
Most residential blocks — whether managed by a managing agent or by a residents' association — impose working hours restrictions: typically 8am–6pm Monday to Friday, with no weekend or bank holiday working permitted. In a house, a contractor can work evenings and Saturdays if the programme requires it. In a flat, the working week is capped, which means longer programme duration, more hire periods for plant and equipment, and higher overall cost relative to output.
Neighbour and Communal Area Restrictions
Communal hallways and lobbies often need to be protected during renovation work — dust sheets, additional cleaning and careful management of deliveries through shared areas. Some managing agents require a deposit or bond against damage to communal areas. All of this adds time and cost to flat renovations that doesn't apply to houses.
Service Routing Complexity
Running new electrical cable, waste pipes or heating pipework in a flat is more complex than in a house. Chasing solid concrete floors to route pipework, running cables through solid masonry party walls, or connecting new soil waste to the building's drainage system within the ceiling voids of a multi-storey block all take more time and care than equivalent work in a house — where you have access to a suspended timber floor and can generally route services more freely.
Buy-to-Let Flat Refurb Economics
For property investors, the question is always the same: does the renovation cost deliver sufficient return in rental income uplift, capital value increase, or both? Here's how the economics typically play out for flat renovation in the UK buy-to-let market.
Rental Income Uplift
A well-targeted cosmetic refurb on a tired but structurally sound 1-bed flat (£8,000–12,000 investment) typically delivers a rental uplift of 10–20% in the right market. At a starting rent of £900/month, that's an additional £90–180/month — recovering the renovation cost in 4–9 years in additional rental income alone. The shorter the recovery period, the higher the ROI — which is why targeting the minimum scope needed to achieve the rental uplift (rather than over-specifying beyond what the rental market demands) matters significantly.
Capital Value Uplift
A full renovation of a 2-bed flat with dated kitchen and bathroom in good structural condition can deliver capital value uplifts of £20,000–60,000 in motivated markets — typically larger than the renovation cost, particularly in supply-constrained locations. The uplift depends heavily on local market conditions: in areas with strong owner-occupier demand, a fully renovated flat commands a meaningful premium over a tired equivalent. In markets where buyers expect to renovate themselves, the uplift is more modest.
Specification for the Market
The single biggest mistake in buy-to-let refurb is over-specifying. A high-gloss kitchen with stone worktops in a rental flat in a market where comparable properties have flat-pack kitchens adds cost without proportional rental or value return. Renovate to the specification of the comparable properties in the immediate area — not above them. The marginal rental premium for a higher specification typically does not justify the additional capital outlay.
For a broader renovation cost context, see the house renovation cost per m² guide and the full house renovation cost breakdown. For bathroom-specific costs — one of the largest line items in a flat renovation — see the bathroom renovation cost UK guide.
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Start Free — No Card NeededFrequently Asked Questions
How much does it cost to renovate a flat in the UK?
Flat renovation cost in the UK in 2026 ranges from £5,000–15,000 for a cosmetic refresh (paint, flooring, new light fittings), up to £40,000–80,000+ for a full gut renovation that strips the flat back to structure and rebuilds everything including new electrics, plumbing and layout reconfiguration. A full renovation — new kitchen, new bathroom, replastering, new flooring and decoration throughout — costs £20,000–50,000+ depending on flat size and specification. Cost per m² is typically 10–20% higher for flats than for equivalent house work due to access constraints, working-hours restrictions and service routing complexity in multi-occupancy buildings.
Do I need freeholder permission to renovate a leasehold flat?
For cosmetic internal work — repainting, new flooring, replacing kitchen units in the same position — most leases do not require freeholder consent. However, for structural changes, wet room or bathroom additions that affect the building fabric, changes to communal systems, or any works penetrating floor or ceiling structures, you will likely need consent from the freeholder or managing agent. Always check your lease before starting significant work. Unauthorised structural alterations in a leasehold flat constitute a breach of lease and can result in reinstatement requirements and legal consequences — particularly on sale.
Why does flat renovation cost more per m² than house renovation?
Flat renovation typically costs 10–20% more per m² than equivalent house renovation. The reasons: access (materials must be carried through shared areas and up stairs or lifts with size restrictions); working hours (most blocks restrict work to 8am–6pm Monday to Friday, extending programme duration); communal area protection (deposits against damage, additional cleaning, delivery management); and service routing complexity (routing waste pipes and cables through solid floors and multi-storey structures takes longer than in a house with accessible floor voids).
What is the ROI on renovating a buy-to-let flat?
A targeted cosmetic refurb on a 1-bed flat (£8,000–12,000) typically delivers a rental uplift of 10–20% — at £900/month starting rent that's £90–180/month additional income, recovering the cost in 4–9 years. A full renovation of a 2-bed flat can deliver capital value uplifts of £20,000–60,000 in motivated markets. The key is matching specification to the comparable rental market — over-specifying adds cost without proportional return.
How much does it cost to renovate a 1-bedroom flat in the UK?
A 1-bedroom flat renovation in the UK costs £8,000–25,000 in 2026 depending on scope. A cosmetic refresh costs £5,000–12,000. A full renovation including new kitchen, new bathroom, replastering and new flooring throughout costs £18,000–35,000. A full gut renovation including full rewire and new plumbing costs £30,000–50,000. A 1-bed flat's floor area is typically 40–55m², and per-m² cost is slightly higher than for a house of equivalent size due to multi-occupancy building constraints.
How much does it cost to renovate a 2-bedroom flat?
A 2-bedroom flat renovation costs £15,000–30,000 for a cosmetic refresh, £30,000–60,000 for a full renovation (new kitchen, bathroom, replastering, flooring), and £50,000–90,000 for a full gut renovation including rewire and new plumbing. A typical 2-bed UK flat is 55–75m² internally. These figures assume a leasehold flat in a multi-occupancy building — per-m² costs are 10–20% higher than equivalent house work due to access constraints, working hours restrictions and service routing complexity.
What are the leasehold rules for flat renovation?
Leasehold flat renovation is subject to your lease terms, which typically requires freeholder or managing agent consent for structural changes, wet room or bathroom additions affecting the building fabric, changes to communal systems, and works penetrating floor or ceiling structures. Cosmetic internal works (repainting, like-for-like kitchen unit replacement, new flooring) generally do not require consent. Always read your specific lease before commissioning significant work. The Leasehold Advisory Service (LEASE) provides free guidance on lease interpretation and leaseholder rights.
People Also Ask
Do I need a licence to carry out works on a leasehold flat?
Most leases require a formal Licence for Alterations (LFA) before carrying out structural works, alterations to building services or works affecting the building fabric. The LFA is a legal document issued by the freeholder's solicitor, outlining the approved works, conditions and any requirements for making good after completion. The cost of obtaining an LFA is typically £500–2,000 in legal fees — borne by the leaseholder, not the freeholder. Starting notifiable works without an LFA is a breach of lease and can expose you to enforcement action and costs. Contact your managing agent or LEASE for guidance.
How much does it cost to renovate a studio flat in the UK?
A studio flat renovation in the UK costs £5,000–12,000 for a cosmetic refresh, £15,000–25,000 for a full renovation including a new kitchen and bathroom, and £25,000–40,000 for a full gut renovation with rewire and new plumbing. A typical UK studio is 25–40m² internally. The smaller floor area reduces the absolute cost compared with a 1-bed or 2-bed flat, but the per-m² cost is broadly similar or slightly higher due to the same access and working restrictions.
Do I need building regulations approval to renovate a flat?
Building regulations apply to flats in the same way as houses. Notifiable work includes: full electrical rewire (Part P), structural changes (Part A), changes to the heating or hot water system (Part L), and new bathroom or shower room additions. Your contractor must notify building control (either self-certifying as a registered competent person or submitting a building notice). A completion certificate should be obtained for all notifiable work — your conveyancer will require this evidence on sale.
What are the working hours restrictions for flat renovation?
Most purpose-built blocks and residential buildings have construction working hours restrictions set out in the lease or building management rules — typically 8am–6pm Monday to Friday, with no working on Saturdays, Sundays or bank holidays. Some blocks allow limited Saturday working (8am–1pm). These restrictions extend the programme duration compared with a house renovation, increasing prelim costs. Check the building management rules before committing to a programme — your contractor will need this information to programme the works accurately.
Is it worth renovating a buy-to-let flat before renting?
A cosmetic refurb of a buy-to-let flat typically delivers the best return on investment for rental purposes — a £8,000–15,000 refresh can uplift monthly rent by 10–20% and significantly reduce void periods. Full renovation of a buy-to-let flat is harder to justify on rental yield alone but can deliver strong capital growth if the flat is in a rising market. The key is matching specification to the local rental market — over-specifying above the comparable rental level adds cost without proportional return. GOV.UK guidance on landlord responsibilities outlines the regulatory requirements for rental properties.
Can I remove a wall in a leasehold flat?
Removing an internal wall in a leasehold flat requires both freeholder consent (via a Licence for Alterations) and building regulations approval if the wall is load-bearing. Even non-load-bearing wall removals typically require freeholder consent under most leases, as they alter the fabric of the demised premises. A structural engineer must assess any wall before removal to confirm whether it is load-bearing. If the wall is between two separate lease-holders' areas (e.g. a party wall), Party Wall Act procedures will also apply. Contact your managing agent before proceeding with any wall removal in a leasehold flat.
Price Your Flat Renovation Before You Commit
Flat renovation has a different cost profile to house renovation — the leasehold context, working restrictions and access constraints all push costs slightly higher on a per-m² basis. Understanding this before you buy or commission the work means your budget is realistic from the outset rather than surprising you partway through the project.
The three scope levels — cosmetic refresh, full renovation, full gut — cover the majority of flat renovation scenarios. Use the figures in this guide as a starting point, then refine with a detailed schedule of works. If you want to go from floor plan to cost breakdown quickly, try RenoCalc free — it covers flats in the same way as houses, room by room, trade by trade.
Also see: full house renovation cost UK for whole-property renovation cost context, and bathroom renovation cost UK — typically one of the larger line items in any flat renovation project.
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