House and Flat Renovation Cost in London: The Definitive 2026 Guide for Homeowners

Servet Yuksel
6 hours ago
19 min read

By Servet Yuksel — BIID Registered Interior Designer, Founder of Kapeti Interior Architecture

What home renovation actually costs in London and the surrounding counties, in 2026:

A full house or flat renovation in London costs £200–£500 per sq ft in 2026, depending on specification, building age, and how much structural and services work is involved.

A light-to-mid refurbishment runs £120–£250 per sq ft.

High-end and listed period properties reach £500–£900+ per sq ft.

For a typical 1,500 sq ft London flat, that is £180,000–£750,000 depending on how far you take it. A 3,000 sq ft house, £360,000–£1.5M+.

This guide gives you the real numbers, the costs most builders don't mention until the project is running, and the decisions that move your budget more than floor area. Written by a BIID registered designer who runs a design and build practice delivering homes across London and the surrounding counties since 2019.

If you'd rather talk through your specific property than read the whole guide, start a WhatsApp conversation with us or email design@kapeti.com — the first conversation is free.

WHO THIS GUIDE IS WRITTEN FOR

Anyone who has just bought, or is about to buy, a house or flat in London or the surrounding counties and is planning to renovate
Owners of a period property — Victorian, Georgian, Edwardian — planning a full or partial renovation
Homeowners wanting to understand what a realistic whole-house budget looks like before committing
Buyers who have been quoted wildly different figures by different builders and want to understand why
Anyone planning a renovation up to roughly 100 miles from central London who wants a single team to handle design and build

If that's you, the next 20 minutes will give you the cost benchmarks, the honest hidden costs, and the framework to plan your project properly.

The headline numbers — 2026 renovation cost by level
What "renovation" actually means — light, full, and structural
The complete cost breakdown — where every pound goes
Six factors that move your budget more than floor area
House vs flat — why they cost differently
Period and listed properties — when costs change category
Hidden costs most renovation quotes don't mention
London vs the surrounding counties — how location changes cost
Where the genuine savings sit — and where they don't
Three anonymised case examples
How to read a renovation quote without getting trapped
Programme — how long a renovation actually takes
Frequently asked questions
What to do next

1. THE HEADLINE NUMBERS — 2026 RENOVATION COST BY LEVEL

The number most homeowners ask for — cost per square foot — is genuinely useful, but only when separated by the level of work. Below are realistic 2026 ranges for house and flat renovation in London and the surrounding counties, based on construction works only (excluding furniture, professional fees and VAT where applicable).

Renovation Level	What It Involves	Cost per sq ft (£)
Light refurbishment	Redecoration, flooring, new bathroom and kitchen, lighting refresh, no structural change	£120 – £200
Mid-level renovation	Reconfiguration, new kitchen and bathrooms, rewiring, replumbing, some structural	£200 – £350
Full renovation	Complete strip-back, full MEP, structural alterations, new layout throughout	£350 – £550
High-end renovation	Bespoke joinery, premium finishes, integrated AV, smart home, premium kitchen and bathrooms	£550 – £750
Listed / heritage full renovation	Conservation-grade restoration plus modern services	£550 – £900+

A 1,500 sq ft flat therefore typically lands between £180,000 (light) and £1,125,000 (high-end heritage) depending on level. Most full renovations of a flat of this size sit between £350,000 and £600,000.

A 3,000 sq ft house typically runs £360,000 (light) to £2.25M+ (high-end heritage). Most full house renovations of this size sit between £700,000 and £1.4M.

These figures reflect what we are quoting and delivering in 2026. The London market has hardened materially since 2023 — labour, materials and compliance costs are all up — and any guide quoting £80–£150 per sq ft as a realistic full-renovation figure is working with pre-2024 numbers or a much lighter scope than most owners actually want.

For our full residential approach, see our Design & Build London service page.

2. WHAT "RENOVATION" ACTUALLY MEANS — LIGHT, FULL, AND STRUCTURAL

"Renovation" is used to describe everything from a repaint to a complete rebuild behind a retained façade. Confusing these is the single most common reason cost expectations go wrong.

Light Refurbishment

Cosmetic and finish-level work in a property that is structurally sound and well-configured. New kitchen, new bathroom, redecoration, flooring, lighting, perhaps some joinery. No walls moved, no major services replacement.

Cost: £120–£200 per sq ft Programme: 6–14 weeks for a typical flat When it's right: Recently built or well-maintained property where the layout already works

Mid-Level Renovation

The most common category. Reconfiguring some spaces, new kitchen and bathrooms, full or partial rewire and replumb, some structural change (removing a wall, forming an opening), full redecoration.

Cost: £200–£350 per sq ft Programme: 14–24 weeks When it's right: Property that works broadly but needs modernising and some layout improvement

Full Renovation

Complete strip-back to brick and joists. New layout throughout, full MEP (mechanical, electrical, plumbing), new kitchen and bathrooms, often structural alterations — removing walls, forming openings, sometimes adding floor area. New everything.

Cost: £350–£550 per sq ft (higher for premium and heritage) Programme: 24–52 weeks depending on size and complexity When it's right: Tired, dated or poorly-configured property where partial work would be a false economy

Where Most Owners Land

Most "I want to renovate" enquiries we receive turn out, after a proper site visit, to be full or near-full renovations — once the walls come off, dated wiring, failing plumbing, poor insulation and awkward layouts make partial work a false economy. Planning honestly for full scope at the brief stage prevents the most painful budget surprises later.

3. THE COMPLETE COST BREAKDOWN — WHERE EVERY POUND GOES

Below is a realistic 2026 cost composition for a full renovation at £420 per sq ft, for a 2,000 sq ft London property.

Cost Category		% of construction
Strip-out, surveys, structural prep		5%
Structural works (walls, openings, steels)		9%
Mechanical, electrical, plumbing (MEP)		17%
Kitchen (supply and install)		11%
Bathrooms (supply and install)		10%
Joinery — bespoke storage, wardrobes, panelling		12%
Flooring, tiling, finishes		8%
Decoration, plastering		6%
Lighting and electrical fit-out		6%
Windows, doors, glazing		5%
Project management and supervision		6%
Contingency (allocated)		5%
Total construction cost		100%

This is the figure a builder or design-build firm typically quotes. It does not include furniture, professional fees in a traditional model, or VAT — covered in section 7.

What Drives the Largest Cost Categories

MEP (17%) — The single biggest invisible cost. Rewiring, replumbing, heating, ventilation, hot water, smart-home cabling. In an old building this is almost always more extensive than expected — original wiring and plumbing rarely meet current standards, and the work is hidden in walls and floors until opened up.

Joinery (12%) — Bespoke wardrobes, storage, panelling, media units, bookshelves, window seats. This is the category where specification swings cost most. Standard fitted wardrobes from a UK supplier versus genuine bespoke joinery can be a 60–100% difference for the same wall.

Kitchen and bathrooms (21% combined) — The two highest-value rooms in any home. A premium kitchen alone (units, worktops, appliances, install) runs £30,000–£120,000+ in London. Bathrooms £15,000–£45,000 each at mid-to-premium specification. These two categories alone can make or break a renovation budget.

Structural (9%) — Removing walls, forming openings, installing steel beams, underpinning if required. Often underestimated because it is invisible in the finished home but essential to the layout that makes the renovation worthwhile.

4. SIX FACTORS THAT MOVE YOUR BUDGET MORE THAN FLOOR AREA

Floor area is the easiest number to talk about, but six other factors swing the final cost more.

1. Building Age and Condition

A Victorian or Georgian property with original features, dated services and decades of patch-repairs costs far more to renovate than a 2010s flat. Older buildings hide more — damp, failing wiring, lead pipes, rotten joists, settlement, asbestos in artex and insulation. A pre-1900 property typically carries a 20–40% premium over modern stock for the same finished specification.

2. Specification Level

The difference between standard and premium specification can double the cost per sq ft without changing the floor area at all. Bespoke joinery, natural stone, premium kitchens, designer bathrooms, integrated AV, smart home, hardwood flooring, premium paint and plaster — each compounds. A 2,000 sq ft flat at £250/sq ft is £500,000. The same flat at £500/sq ft is £1M. The difference is almost entirely materials and joinery quality, not extra space.

3. Structural Ambition

Keeping the existing layout is cheap. Removing walls, forming open-plan space, adding an extension, converting a loft, digging out a basement, moving the kitchen or bathrooms (which moves drainage and services) — each adds significant cost. Structural ambition is often the single biggest swing factor between two renovations of the same square footage.

4. Kitchen and Bathroom Count and Specification

These are the most expensive rooms per square foot. A house with one kitchen and four bathrooms carries far more cost than the same square footage with one kitchen and two bathrooms. Specification matters enormously — the gap between a £25,000 kitchen and a £90,000 kitchen is real and visible.

5. Services and Compliance

Full rewire, new consumer unit, new heating system, new hot water, ventilation to current standards, smart home infrastructure, EV charging, improved insulation, fire and safety compliance. In a leasehold flat, Building Control and freeholder requirements add further. Services and compliance routinely account for 15–25% of a full renovation and are almost always underestimated.

6. Access and Logistics

A ground-floor house with parking and easy access renovates more cheaply than a third-floor flat in a mansion block with no lift, restricted working hours, and a freeholder who requires protection of common parts. Central London access constraints — narrow streets, parking restrictions, congestion and ULEZ charges for site vehicles, limited deliveries — add 5–15% to the equivalent easy-access cost.

If you'd like a free conversation about how these factors apply to your specific property, we run these site visits routinely across London and the surrounding counties.

5. HOUSE VS FLAT — WHY THEY COST DIFFERENTLY

The same floor area in a house and a flat rarely costs the same to renovate. The reasons are structural and legal.

Flats

Freeholder consent — Most leases require a Licence to Alter from the freeholder before any structural or services work. This adds time (4–10 weeks) and cost (freeholder's surveyor and legal fees, often £3,000–£15,000).
Access — Upper-floor flats in mansion blocks without lifts add labour and logistics cost. Common parts must be protected.
Restricted hours — Many blocks restrict working hours, which extends programme and adds cost.
Sound and party walls — Acoustic separation and party wall agreements with neighbours add cost and time.
Services constraints — Moving a kitchen or bathroom in a flat is constrained by the position of risers and drainage shared with the building.

Houses

More freedom — Generally no freeholder consent for a freehold house, more structural freedom, easier access.
More scope — Extensions, loft conversions, basement digs, garden rooms — houses offer more ways to add value and space, but each adds cost.
Whole-building services — A house carries its own full services (heating, hot water, drainage) where a flat shares some building infrastructure.
Party wall — Terraced and semi-detached houses still trigger Party Wall Act agreements with neighbours for structural work.

In practice, a flat renovation often carries higher per-sq-ft cost than a house of the same size, because of access constraints and freeholder requirements — even though the house has more total scope.

6. PERIOD AND LISTED PROPERTIES — WHEN COSTS CHANGE CATEGORY

A large share of London's most desirable homes — and many in the surrounding counties — are Victorian, Georgian, Edwardian, or listed. These don't just cost "more," they exist in a different cost category.

What Triggers Period / Heritage Cost Treatment

Listed Building status (Grade I, II*, II)
Conservation area location — much of central and inner London
Pre-1900 construction
Original features worth retaining: cornicing, ceiling roses, sash windows, panelled doors, fireplaces, parquet, decorative plaster
Party wall implications with adjoining period properties

Why Period Properties Cost Differently

Specialist trades — Lime plaster, sash window restoration, traditional joinery, cornicing repair, period-correct flooring. These trades cost more per day and are in shorter supply than standard builders.

Hidden conditions — Damp, rot, failing lath-and-plaster, settlement, lead pipework, knob-and-tube wiring, asbestos. Period properties reveal expensive surprises once opened up.

Listed building consent — Where applicable, conservation officer approval adds time (8–16 weeks) and cost (heritage consultancy, sample submissions, design adjustments). Many alterations must be reversible, which adds cost.

Materials specification — Conservation often requires period-correct materials: lime mortar, traditional paints, wide-board timber. These cost more and have longer lead times.

Realistic Period / Listed Premiums

Property Status	Typical Cost Premium vs Modern
Conservation area (not listed)	+10–20%
Grade II listed	+25–45%
Grade II* listed	+40–60%
Grade I listed	+50–80%

A £420/sq ft full renovation specification in a Grade II listed Chelsea or Kensington period house can realistically run £550–£700 per sq ft for the same finished output. The premium reflects genuine specialist requirement, not builder margin.

For period homes in the prime central postcodes, our guide on Renovating in Knightsbridge & Mayfair: Licences, Building Management Rules and Contractor Pitfalls covers the regulatory and practical realities in detail.

7. HIDDEN COSTS MOST RENOVATION QUOTES DON'T MENTION

The construction quote you receive will not include all of the following. Budget for them separately — this is where £300,000 quoted projects become £600,000 actual projects.

Professional Fees

In a traditional model (separate designer and builder), expect to pay separately for:

Consultant	Typical 2026 Fee
Architect / interior designer	8–15% of construction cost
Structural engineer	£2,500–£12,000
Building Control approval	£1,500–£6,000
Party Wall surveyor (if applicable)	£1,500–£5,000 per neighbour
Planning consultant (if applicable)	£3,000–£10,000
Principal Designer (CDM)	£2,500–£8,000
Heritage consultant (listed)	£3,000–£12,000

For a £500,000 renovation, professional fees in a traditional model run £50,000–£90,000 — unless you use a design-build firm where these are integrated under one contract. (We are. Most of the market isn't.)

Furniture, Furnishings and Styling (FF&E)

The renovation gives you a finished shell. Furniture, soft furnishings, curtains, rugs, beds, dining and living furniture, lighting fixtures, art and accessories are separate. A full furnishing budget for a 2,000 sq ft home runs £60,000–£250,000+depending on specification. (More on full turnkey "renovate plus furnish" service in a forthcoming guide — it's the single most requested combined service we deliver for buyers who want to walk into a finished home.)

VAT

Most renovation work is standard-rated at 20%. There are specific exceptions — properties empty for 2+ years qualify for a reduced 5% rate, and some listed/charitable work has special treatment — but for most homeowners, budget 20% on the whole project. 20% of £500,000 is £100,000, and it's the most commonly forgotten line in renovation budgeting.

Surveys and Investigations

Measured survey, structural survey, asbestos survey, damp investigation, drainage survey. £2,000–£10,000 before any work begins, and essential for an accurate quote.

Contingency

Real renovations encounter real surprises — especially in older buildings. A renovation budget without a 10–15% contingency is incomplete. In period properties, 15–20% is realistic.

Temporary Accommodation

If you can't live in the property during works (true for most full renovations), factor rent elsewhere for the programme duration. On a 6–12 month renovation, this is a real and often forgotten cost.

8. LONDON VS THE SURROUNDING COUNTIES — HOW LOCATION CHANGES COST

We deliver across London and roughly 100 miles around it — into the Home Counties and beyond for the right project. Location changes cost meaningfully.

Prime Central London (Chelsea, Kensington, Knightsbridge, Mayfair, Belgravia, Westminster — SW1, SW3, SW7, W1, W8)

Premium: Highest in the country. High specification expectations, period and listed buildings, complex access, freeholder requirements, conservation constraints. Full renovations routinely £500–£900 per sq ft.

Inner London (Notting Hill, Hampstead, Islington, Fulham, Wandsworth, Richmond)

Premium: High. Strong period stock, conservation areas, high specification expectations. Full renovations typically £400–£650 per sq ft.

Outer London (Wimbledon, Dulwich, Ealing, Barnes, Greenwich)

Premium: Moderate. Mix of period and modern, easier access, generally lower than inner London. Full renovations typically £350–£550 per sq ft.

Home Counties (Surrey, Buckinghamshire, Hertfordshire, Berkshire, Oxfordshire, Kent)

Premium: Lower than London for equivalent specification — easier access, lower labour and logistics costs, often larger properties. Full renovations typically £300–£500 per sq ft. Premium villages (Cobham, Beaconsfield, Henley, Sevenoaks) approach London specification expectations and cost.

Further Afield (Cotswolds, coastal counties, country houses up to ~100 miles)

Premium: Variable. Country and listed properties can carry high specification and heritage premiums, but labour and logistics are generally cheaper than central London. We deliver these where the project justifies the team's travel and management.

For larger country properties and second homes, we routinely manage projects well outside London — the design and project management is centralised, and our manufacturing partner network means bespoke joinery and finishing are delivered to the same standard regardless of location.

9. WHERE THE GENUINE SAVINGS SIT — AND WHERE THEY DON'T

Real Savings — These Matter

Design and build under one contract. When the same team designs and builds, the coordination losses, redesigns and contractor variation claims of traditional procurement disappear. 8–15% saving on total project cost, plus programme certainty. This is how Kapeti operates — design, build, joinery, MEP, decoration and furnishing under one contract, one programme, one liable party.

Bespoke joinery through specialist manufacturers outside the UK. Wardrobes, panelling, kitchens, media units, bookshelves, dressing rooms — UK suppliers carry significant overhead, while specialist manufacturers in Turkey, Portugal and Poland produce equivalent or higher-quality work at meaningfully better rates. The saving across our projects: 25–45% on bespoke joinery, with no compromise on quality. We design in London, specify to UK standards, verify quality at production, manage shipping and customs, and install with our own London team. The output is what the market delivers at £450/sq ft, delivered closer to £370.

Decisions made early and held. Most budget overruns come not from site surprises but from late changes — kitchen upgraded after design freeze, layout changed mid-build, finishes revised after ordering. Each change multiplies cost. Decisions made at design stage and held are the single most reliable cost control.

Realistic contingency from day one. Budgeting 10–15% contingency up front (15–20% for period properties) means surprises are absorbed rather than becoming crises.

False Savings — These Usually Cost You

Choosing the cheapest builder's quote. Almost every renovation horror story started with the lowest quote. The variance between quotes is rarely efficiency — it's scope, specification, contingency and competence. Cheap quotes reveal exclusions and "extras" three months in, when you're committed and the walls are open.

Cutting the survey and design stage. Starting work without proper surveys and a complete design is the fastest route to mid-project changes, which are the most expensive kind. Time spent in design saves multiples on site.

Saving on what's hidden. Wiring, plumbing, insulation, waterproofing, structural work. These are invisible in the finished home but ruinously expensive to redo. Saving here is borrowing from your future self at a punishing interest rate.

Skipping the contingency. A renovation budgeted to the last pound with no contingency is a renovation that will overrun and cause stress. Build it in.

10. THREE ANONYMISED CASE EXAMPLES

Below are three project profiles from our recent and current portfolio. Numbers are real ranges, anonymised at the request of the clients.

Case A — Period Flat, Prime Central London

Property: Approximately 1,600 sq ft, two-bedroom flat in a Victorian mansion block, conservation area
Project: Full renovation — reconfiguration, new kitchen, two new bathrooms, full rewire and replumb, bespoke joinery throughout, smart-home integration
Specification: High-end
Construction cost: Approximately £250,000
Furnishing (FF&E): Approximately £120,000
Programme: 20 weeks (including Licence to Alter from freeholder)
Key features: Bespoke joinery produced through Turkish manufacturing partners, full acoustic upgrade for mansion-block living, freeholder consent navigated

Case B — Family House, Inner London

Property: Approximately 3,200 sq ft Victorian terraced house over four floors
Project: Full renovation plus rear extension and loft conversion — open-plan kitchen-dining, five bedrooms, four bathrooms, full MEP, structural alterations
Specification: Premium
Construction cost: Approximately £450,000
Furnishing (FF&E): Approximately £150,000
Programme: 40 weeks
Key features: Party wall agreements with both neighbours, structural steel for open-plan ground floor, bespoke kitchen and joinery

Case C — Country House, Home Counties

Property: Approximately 4,500 sq ft detached period house, roughly 60 miles from central London
Project: Full renovation and modernisation — retaining period character, new services throughout, premium kitchen, four bathrooms, bespoke joinery, integrated technology
Specification: Premium-to-high-end
Construction cost: Approximately £450,000
Furnishing (FF&E): Approximately £200,000
Programme: 50 weeks
Key features: Centralised London design and project management, bespoke joinery delivered through manufacturing partner network, period features retained and restored

These are realistic 2026 numbers. Anyone quoting you dramatically less for similar scope is either pricing a lighter specification, working with old cost data, or will resolve the gap through extras during the project.

11. HOW TO READ A RENOVATION QUOTE WITHOUT GETTING TRAPPED

1. Check the Assumptions and Exclusions

Common exclusions hidden in renovation quotes: VAT, furniture, professional fees, surveys, party wall costs, freeholder fees, "making good" of unforeseen conditions, and anything described as "subject to opening up." Each exclusion is a future cost. Work through the list before signing.

2. Identify Provisional Sums

Placeholder budgets for items not yet specified — kitchen, bathrooms, joinery, flooring, lighting. These resolve to actual costs during the project, often higher. If more than 20% of the quote sits in provisional sums, you're signing significant budget uncertainty. Push to firm up as much as possible first.

3. Verify the Contingency

A renovation quote with no contingency (or under 10% for an older property) is incomplete. Either the builder includes it, or you carry it on top. One or the other must exist.

4. Examine the Payment Schedule

Front-loaded payment schedules favour the builder, not you. Stage payments tied to completed work are better. Avoid large upfront deposits beyond 10–15%. Retain 5% for several months after completion to cover snagging.

5. Check Insurance and Accreditation

Public Liability (minimum £2m), Employer's Liability, Contractor's All Risks. BIID, RIBA or FMB membership signals competence. Ask for documentary evidence. A builder reluctant to show insurance certificates is a builder to avoid.

6. Get References You Can Actually Speak To

The single best test. Ask for three completed projects of similar scale with contactable clients. Any competent firm has them. Reluctance here is the clearest warning sign in the industry.

12. PROGRAMME — HOW LONG A RENOVATION ACTUALLY TAKES

Project Type	Realistic Programme
Light refurbishment (flat)	6–14 weeks
Mid-level renovation (flat)	12–24 weeks
Full renovation (flat)	16–32 weeks
Full renovation (house)	24–48 weeks
Full renovation + extension/loft (house)	28–52 weeks
Listed / heritage full renovation	36–72 weeks

Add 6–12 weeks at the front for design, surveys, statutory approvals, Licence to Alter (flats), party wall agreements, and procurement before work starts on site.

What Drives Programme Length

Building age and hidden conditions (older = more surprises = longer)
Structural ambition (extensions, lofts, basements add months)
Statutory approvals (planning 8–13 weeks, listed building consent 8–16 weeks, Licence to Alter 4–10 weeks)
Procurement lead times (bespoke joinery 8–16 weeks, premium kitchens 10–16 weeks, specialist materials variable)
Single-phase vacant works versus phased works in occupation (phased adds significantly)

A full renovation of a London flat from first conversation to moving back in typically runs 9–14 months total. A full house renovation with structural work, 12–18 months.

13. FREQUENTLY ASKED QUESTIONS

How much does it cost to renovate a house in London 2026?

A full house renovation in London costs £150–£550 per sq ft for construction (higher for premium and listed properties), plus furnishing, professional fees and VAT. A 3,000 sq ft house full renovation typically runs £450,000–£1.4M all-in, more for high-end or heritage.

How much does it cost to renovate a flat in London 2026?

A full flat renovation costs £150–£550 per sq ft for construction. A 1,500 sq ft flat full renovation typically runs £225,000–£600,000 for mid-to-premium, more for high-end. Flats often carry higher per-sq-ft cost than houses due to access constraints and freeholder requirements.

What is the cost per square foot to renovate a property in London?

Light refurbishment: £120–£200 per sq ft. Mid-level: £200–£350. Full renovation: £300–£550. High-end: £500–£750. Listed/heritage: £500–£900+. Construction only — add furnishing, fees and VAT.

How much does it cost to renovate a Victorian or period house?

Period and listed properties carry a 25–80% premium over modern stock depending on listing grade. A Grade II listed full renovation in London commonly runs £500–£700 per sq ft. The premium reflects specialist trades, hidden conditions, conservation requirements and period-correct materials.

What hidden costs should I budget for in a renovation?

The most commonly underestimated: VAT at 20%, professional fees (£50,000–£90,000 on a £500k traditional project), furniture and furnishing (£60,000–£250,000+), surveys (£2,000–£10,000), party wall and freeholder fees, contingency (10–20%), and temporary accommodation during works.

Do I need planning permission to renovate?

Internal renovation with no change of use or external alteration usually does not need planning permission — but you will need Building Control approval, and a Licence to Alter from your freeholder if you lease a flat. Extensions, loft conversions, external changes, and any work to a listed building trigger additional consents. Allow 8–16 weeks where applicable.

How long does a full renovation take?

Full flat renovation: 24–36 weeks on site. Full house renovation: 30–52 weeks. With extension or loft: 40–60 weeks. Listed property: 44–72 weeks. Add 6–12 weeks at the front for design, approvals and procurement. Total project from first conversation to moving back in: 9–18 months depending on scope.

Is it cheaper to use a design-build firm or separate architect and builder?

Design-build is consistently 10–20% cheaper on total project cost, and significantly more reliable on programme. With separate parties, redesigns and contractor variations absorb the apparent savings of competitive tendering, and no single party is accountable for the finished result. Design-build gives one team, one contract, one point of responsibility.

Can you renovate properties outside London?

Yes. We deliver across London and roughly 100 miles around it — the Home Counties and beyond for the right project. Design and project management are centralised, and our manufacturing partner network delivers bespoke joinery and finishing to the same standard regardless of location.

Should I renovate before moving in, or live there during the works?

For a full renovation, renovating before moving in (or during a planned period away) is almost always cheaper and faster than phased works in occupation. Phased works around an occupied home add 30–60% to programme and meaningful cost, due to repeated mobilisations, dust and noise control, and reduced trade efficiency.

How much should I budget for a kitchen and bathrooms?

In London 2026: a premium kitchen runs £20,000–£120,000+ supply and install. Bathrooms £15,000–£45,000 each at mid-to-premium specification. These two categories combined often account for 20–25% of a full renovation budget — they are the highest-value rooms in the home.

What's the difference between renovating a house and a flat?

Flats require freeholder consent (Licence to Alter), face access and working-hours restrictions, and have services constrained by shared building infrastructure. Houses offer more structural freedom and more scope (extensions, lofts, basements) but carry their own full services. Flats often cost more per sq ft; houses offer more total scope.

How do I keep a renovation within budget?

Five disciplines: engage a design-build team early so design and cost are aligned from the start; complete the design fully before work begins; make specification decisions early and hold them; build in a realistic contingency (10–20%); and budget the hidden costs (VAT, fees, furnishing, surveys) into the total from day one rather than discovering them later.

14. WHAT TO DO NEXT

If you are planning to renovate a house or flat — in London or the surrounding counties, whether you've just bought, are about to, or are finally tackling the home you've owned for years — the most useful first step is a conversation, not a quote.

We do this for free.

We will visit the property, walk through what you want to achieve, and give you genuine numbers and a realistic programme — usually within 48 hours of the visit. No commitment, no pressure, no follow-up sales calls if it isn't the right fit.

Whether Kapeti turns out to be the right partner for your project or not, you'll leave that conversation with a much clearer picture of where your budget needs to sit and what choices will give you the best result.

We are based in the Chelsea area, BIID registered, design and build under one contract, with a delivery team and manufacturing partner network that has completed homes, period restorations, apartments and country houses across London and the surrounding counties since 2019. We handle everything from design through construction to the final furnishing — one team, one contract.

The first conversation is free. No cost, no obligation.

📲 WhatsApp: +44 7342 240695 ✉️ Email: design@kapeti.com 🌐 Website: kapeti.com

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SERVICE PAGES

Servet Yuksel is a BIID Registered Interior Designer and the founder of Kapeti Interior Architecture, a design and build practice based in the Chelsea area in London. Kapeti delivers home renovations, period restorations, apartments and country houses across London and the surrounding counties, handling design, construction and furnishing under one contract, with bespoke joinery supported by manufacturing partner relationships in Turkey, Portugal and Poland.