How To Use This Cost Guide
Central London refurbishments usually carry a double premium: the buildings are harder to work on and the expected standard of finish is higher. That makes budgeting discipline even more important at the concept stage.
Whether the property is a Marylebone flat, a Mayfair apartment or a Pimlico townhouse, the budget needs to account for building management rules, access, finish expectations and the risk that services or fabric upgrades will follow once strip-out begins.
Important: these are planning-stage guide budgets, not fixed quotes. They are most useful when you already know the rough scope, planning route and finish level you are aiming for.
The safest way to use them is to decide which budget band your project really belongs to, then add professional fees and contingency before testing contractor pricing.
Budget Bands
Square-metre ranges are most useful when they reflect the property type. Leasehold flats, listed homes and multi-storey houses do not carry the same commercial profile even when the floor area looks similar.
| Project Scope | Guide Budget | What That Usually Covers |
|---|---|---|
| Flat refurbishment | GBP1,100-GBP1,800 per m2 | Typical for strong finish upgrades, kitchen and bathroom renewal, electrical works and careful making-good. |
| Comprehensive home refurbishment | GBP1,800-GBP3,000 per m2 | Relevant once services, layout improvements and premium room finishes are all part of the brief. |
| Listed or highly bespoke refurbishment | GBP3,000-GBP4,500 per m2 | Appropriate where heritage approvals, bespoke detailing and premium material choices sit at the centre of the project. |
| Prime full-home transformation | GBP4,500 per m2 and above | For ultra-premium central London work where the brief resembles a boutique-hotel or super-prime residence standard. |
What Usually Moves the Cost Most
In central London, cost is shaped by property governance and finish expectation almost as much as by the physical work itself.
Leasehold and building rules
Access windows, communal protection, porter rules, lift use and freeholder approvals can all increase preliminaries and slow the programme.
Services and comfort upgrades
Air conditioning, improved ventilation, upgraded electrics and acoustic treatment are common central-London asks that push budgets upward.
Joinery and finish level
Premium kitchens, fitted storage, stone bathrooms and decorative detail drive a large part of the visible spend.
Listed and conservation sensitivity
Where original features matter, repair, reinstatement and consent-led detailing increase both design time and construction complexity.
Typical Project Scenarios
These examples help you sense-check whether your project lives in the efficient refurbishment bracket or in the fully bespoke prime-home bracket.
90m2 apartment refurbishment
A realistic range for a high-quality flat upgrade with kitchen, bathroom, services and decoration all coordinated.
Central townhouse full refurbishment
Typical where multiple floors, stronger joinery expectations and full-room replacement all sit inside one contract.
Listed prime-home refurbishment
Relevant once heritage, bespoke detailing and premium comfort systems drive the scope.
Hidden Costs and Allowances
The headline build number is only useful if you are also honest about the items that sit around it.
- Freeholder licences, building management deposits and communal-area protection.
- Temporary kitchen or bathroom arrangements on live-in projects, plus storage and relocation if needed.
- Acoustic upgrades, mechanical ventilation, cooling and concealed services that do not show up in early mood-board budgets.
- Contingency for hidden defects, historic alterations and specialist repair once the property is opened up.
Budgeting rule: if the house is older, constrained, heavily altered or part of a wider live-in renovation, the contingency should sit closer to the upper end of your comfort range rather than the lower end.
Local Pricing Factors
These are the market and property details that most often explain why London projects land above the simplified online average:
- Central London flats often carry more administration and site-management overhead than homeowners expect from the raw size of the job.
- Prime postcodes reward detail and finish consistency, so low allowances on joinery, lighting or stone tend to be false savings.
- Listed and conservation context can make even interior projects slower and more specialist than generic refurbishment guides imply.
- Premium work benefits from a whole-project budget, not a room-by-room wishlist priced in isolation.
Market Sources Reviewed
Home Trust: home refurbishment costs in London 2026
Updated 2026 London refurbishment ranges by square metre and project intensity.
Havnwright: full house renovation costs UK 2025
Strong baseline for whole-house project size bands, hidden costs and London regional uplift.
These sources give current London or UK market signals. We use them as calibration points, then adjust for property type, postcode, access and finish level.