Flat
refurbishment
in St James's, SW1
Architects, Engineers, Surveyors & Builders Under One Roof.
One Studio. One Contract. One Team.
RICS surveying support for party walls, licence to alter, conservation-area works & neighbour mattersWe've completed flat refurbishments across Ryder Street mansion blocks, Duke of York Street conversions, St James’s Square mansions - mansion blocks and period conversions where freeholder approvals, acoustic compliance and access logistics need handling properly.
Flat Refurbishment in St James's: What You Need to Know
Refurbishing a St James's flat is not the same as refurbishing a house. The Licence to Alter is usually required before a single brick moves, Part E of the Building Regulations dictates floor and ceiling build-ups, and site logistics must account for lift protection, works-hours restrictions, and neighbour disruption. Our team manages freeholder surveyors, Party Wall awards, and Westminster Building Control in parallel so your project starts cleanly and finishes without disputes.
Historic quarter between Piccadilly and The Mall. Crown Estate and Duchy of Cornwall properties. Grade I and II listed buildings throughout. Westminster's most heritage-sensitive area. A full refurbishment in St James's typically involves stripping the property back to its structural shell, upgrading mechanical and electrical services, reconfiguring layouts, and finishing to the highest standard — all while preserving and restoring original period features.
Our St James's refurbishment projects are managed through a single point of contact, coordinating architects, structural engineers, M&E specialists, and specialist subcontractors. We work within Westminster's planning and building control requirements to deliver on time and on budget.
St James's residential character sits above its famous ground floor, and a flat refurbishment here is led firmly by consents and logistics. Its homes are largely mansion flats, period chambers and upper-floor conversions — many listed, above the galleries, clubs and shops — where structure, acoustics and managing-agent consents are central to the work.
The controls are among the tightest anywhere. St James's sits within its conservation area on the historic streets between St James's Park and Piccadilly; Westminster scrutinises external change exceptionally closely, much of the area is listed, and the prestige mixed-use ground floor and tight streets shape every project. Jermyn Street and King Street carry period buildings with flats and chambers above, while Duke Street and the streets towards Pall Mall add mansion flats and upper-floor conversions.
Measured against Westminster, a flat refurbishment is £60,000–£110,000 excluding VAT, confirmed once the lease, listing and restricted access are scoped.
What a Flat Refurbishment Involves
Refurbishing a flat means renovating inside a building you share — so the job is as much about leases, neighbours and building rules as it is about kitchens and finishes. We plan every project around the consents your lease demands and the protocols your block expects, then deliver the technical work under one fixed-price contract. A typical scope covers the elements below.
- Licence to Alter — lease review, application pack and freeholder’s surveyor queries handled on your behalf
- Acoustic build-up — separating floors and walls upgraded to meet Building Regulations Part E and any stricter freeholder schedule
- Wet-room tanking — certified waterproofing beneath every bathroom, flood-tested before tiling and covered by a 12-month defects period
- Rewire & replumb — new circuits, pipework and heating, coordinated with the building’s risers and stacks
- Layout changes — internal openings engineered, approved by building control and cleared with the freeholder where the lease allows
- Kitchens & bathrooms — designed, supplied and fitted to the specification tier you select
- Period detail — cornicing, sash windows and fireplaces retained and repaired in conversion flats
- Block protocols — lift protection, booked deliveries, restricted noisy hours and daily cleaning of communal areas
How We Run Your Project
Six stages, sequenced so freeholder consent never holds up the start on site.
- Survey & lease review — we measure the flat, inspect the services and read your lease to identify exactly which consents apply.
- Design & consents — our architects develop the layout while the Licence to Alter application runs in parallel, not afterwards.
- Fixed-price contract — an itemised specification agreed in full, with the acoustic and tanking details written in.
- Strip-out & first fix — soft strip, structural openings, cabling, pipework and the acoustic carcass, all removed and delivered through agreed routes.
- Second fix & finishes — kitchen, bathrooms, joinery, flooring and decoration.
- Testing & handover — snagging, certification and reinstatement of any communal areas before the keys come back to you.
Read the full flat refurbishment guide for flat typologies, specification tiers and the Licence to Alter process in detail.
Almost every leasehold flat needs formal freeholder consent — a Licence to Alter — before structural work, new flooring or services alterations can begin, and proceeding without one puts your lease at risk. Building Regulations apply on top: Part E sound insulation between dwellings, electrical and heating sign-off, and fire safety where walls or floors are opened. Flats and maisonettes also have no permitted development rights, so external changes always need a planning application. Our planning guide library covers the rules borough by borough.
Why Hampstead Renovations
Flat refurbishment rewards a team that already knows what freeholders and managing agents will ask for. Design is led by our in-house RIBA Chartered Architects, lease and party-structure matters are supported by RICS surveying through our sister company, Hampstead Chartered Surveyors, and the build is carried out by our own long-standing teams. Every contract is fixed-price on JCT terms, backed by £10M public liability insurance — the level major London freeholders require — plus a 12-month defects period and a 10-year workmanship warranty. Enquire before 2pm on a weekday and we will call you back the same day.
What does a flat refurbishment cost in St James's?
A flat refurbishment in St James's runs £900–£1,700/sqm excluding VAT, and a full two-bedroom refurbishment typically lands between £60,000 and £110,000. Most programmes take 16–32 weeks on site. A written scope and site assessment are needed before any project price can be fixed.
| Scope of work | Guide rate | Typical total |
|---|---|---|
| Full flat refurbishment (2-bed) | £900–£1,700/sqm | £60,000–£110,000 |
| Typical programme | 16–32 weeks on site | |
Guide rates exclude VAT and are set by depth of work, not by property type. Compare scopes in our London refurbishment cost-per-square-metre guide.
Flat Refurbishment in St James's: Questions
What kind of homes are refurbished in St James's?
Largely mansion flats, period chambers and upper-floor conversions, many of them listed and set above the famous galleries, clubs and shops — so refurbishment here is led by consents and logistics rather than by the finishes alone.
Is St James's in a conservation area?
It is, and a strict one. St James's sits within its conservation area on the historic streets between St James's Park and Piccadilly, Westminster scrutinises external change exceptionally closely, and much of the area is listed.
How much does a flat refurbishment cost in St James's?
A St James's flat carries a band spanning £60,000–£110,000 excluding VAT, with borough house renovations covering £90,000 to £475,000 excluding VAT. Listing, the lease and restricted access then set the figure.
What drives the budget on a St James's flat?
Estate and leasehold coordination, party-wall awards, protected facades, restricted access and careful temporary works, plus structural openings in older townhouses and the level of detailing expected around SW1 mansion flats and historic streets.
Which St James's streets do you work on?
Jermyn Street and King Street carry period buildings with flats and chambers above the shops and galleries; Duke Street and the streets towards Pall Mall add mansion flats and upper-floor conversions in a strictly-protected setting.
Local character & heritage: renovating flats in St James's
St James's sits in the City of Westminster, and a large share of its homes are leasehold flats — within historic townhouses, gentlemen's clubs and shops in London's most traditional quarter. Refurbishing one is a full interior project: reconfiguring the layout, renewing services and finishes, and often combining or reworking rooms within the existing footprint.
The work runs under the lease, so the freeholder's or managing agent's consent sits alongside Building Regulations and the Party Wall Act usually applies between flats; external elements such as windows stay controlled in conservation areas. Because the area is overwhelmingly listed and largely commercial, we coordinate the lease, the freeholder and the build as one fixed-price contract.
St James's heritage & architecture: Renovating a flat · Kitchens in period flats · Licence to alter · Mansion flats · Roof developments & conservation · Conservation areas
Flat Refurbishment in St James’s: Planning & Local Context
Westminster City Council · SW1
Planning for flat refurbishment in St James’s
Flat refurbishment in St James’s sits across two consent regimes: Westminster City Council for planning and building control, and your freeholder for a licence to alter covering structural changes, new services and floor build-ups — essential within St James’s's conservation areas and most mansion blocks.
Westminster City Council context
St James’s SW1 sits within St James’s's conservation areas, and Westminster applies a demanding conservation and listed-building regime, and many mansion blocks and townhouses here are listed or sit within tightly controlled estates such as the Grosvenor, Howard de Walden and Crown estates. Parts of St James’s fall within the Crown Estate. Our in-house RIBA Chartered Architects prepare and submit every application to Westminster City Council and handle pre-application discussions where early planning advice is useful.
Building Regulations
Flat Refurbishment in St James’s must satisfy Building Regulations — covering sound insulation to Part E, fire compartmentation to Part B, and certified electrical and plumbing works. Our in-house engineers manage Building Control from initial notice to completion certificate.
Recent work & local links
Explore our other St James’s services — Kitchen Renovation Loft Conversions — or the St James’s renovation hub.
Our in-house planning team prepares and submits every Westminster City Council application and manages building control end to end. View our planning track record →
Guides & Local Reading
Flat Refurbishment in Nearby Areas
More Services in St James's
Book a Free Consultation
Visit our studio or invite us to survey your home. We’ll assess scope, discuss design possibilities and provide an honest budget framework — completely free.
Free Consultation
We survey your property, discuss your vision and provide a clear budget framework.