Flat
refurbishment
in Mayfair, W1
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 Grosvenor House Apartments, Mount Street mansion blocks, Audley House - mansion blocks and period conversions where freeholder approvals, acoustic compliance and access logistics need handling properly.
Flat Refurbishment in Mayfair: What You Need to Know
Refurbishing a Mayfair 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.
London's most exclusive residential neighbourhood. Mount Street, South Audley Street, and Grosvenor Square. Westminster conservation area with many Grade I and II listed buildings. Ultra-prime property market. A full refurbishment in Mayfair 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 Mayfair 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.
Mayfair flat refurbishment has a postcode within a postcode: the prime flats of Mount Street and South Audley Street, leasehold homes whose projects are coordinated with Westminster and Grosvenor Estate consents from the first meeting. These are the apartments that set the tone for W1 — richly-detailed red-brick and stone buildings where the refurbishment must honour the architecture it sits inside.
Beyond those streets, the flat stock runs across grand Georgian terraces on the garden squares, converted mews and the mansion blocks — much of it listed, most of it leasehold under estate management — and in the blocks a refurbishment weaves structure, acoustics and estate consents together in support of an exacting finish. The combination is why Mayfair work is as much about consents as construction.
Our headline range for a flat refurbishment in Westminster is £60,000–£110,000 excluding VAT, mirroring the London-wide band for a full two-bedroom refurbishment. A Mayfair flat is quoted against its lease, its listing and its block — the three documents that decide what the money can actually buy. We read all three before we sketch anything.
Flat Refurbishment in Mayfair: Applied to the Local Stock
Mayfair sits within the Mayfair Conservation Area; Westminster scrutinises external change exceptionally closely and the Grosvenor Estate adds a consent layer on top of planning. Mayfair sits at the heart of the City of Westminster, almost entirely within the Mayfair Conservation Area and largely on the Grosvenor Estate. Mayfair sits within the Mayfair Conservation Area; Westminster scrutinises external change closely and Grosvenor Estate consent can add a further layer.
Sources: Grosvenor — Belgravia & Mayfair Estate Management Schemes: alterations guidance (2026); Westminster City Council — Mayfair Conservation Area mini guide (May 2004) (2026)
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 Mayfair?
A flat refurbishment in Mayfair 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 Mayfair: Questions
What defines a flat refurbishment on Mount Street or South Audley Street in Mayfair?
Coordination. The prime flats of Mount Street and South Audley Street are leasehold projects run in step with Westminster and Grosvenor Estate consents — the refurbishment is planned around that double approval from the outset, and the design ambition is calibrated to what both will support.
How much does a flat refurbishment cost in Mayfair?
Our Westminster headline range is £60,000–£110,000 excluding VAT, in line with the London-wide band for a full refurbishment of a two-bedroom flat. Mayfair projects are then priced individually — lease terms, listing status and block requirements move the figure more than square footage does.
Is refurbishing a Mayfair flat mostly a consent exercise?
To a striking degree, yes — the layers of protection at play make Mayfair work as much about consents as construction. We treat the approvals as the critical path and let the build programme follow it, which is the sequence this district rewards.
What kinds of buildings hold Mayfair's flats?
The stock runs from grand Georgian terraces on the garden squares to discreet mews houses and prime mansion flats — much of it listed, and most of it leasehold under estate management. Each building type gives its flats a different set of possibilities and constraints.
How do you handle structure and acoustics in a Mayfair mansion flat?
As part of one design, never as afterthoughts. Mansion flats here are leasehold projects where structure, acoustics and estate consents sit alongside an exacting finish — so the floor build-ups, party-wall treatments and services routes are engineered together with the interior scheme they serve.
Recent Projects Near Mayfair
Local character & heritage: renovating flats in Mayfair
Mayfair sits in the City of Westminster, and a large share of its homes are leasehold flats — within grand Georgian townhouses of the Grosvenor Estate, much now commercial or flats. 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 a very high proportion of buildings are listed and the Grosvenor Estate manages many leases, we coordinate the lease, the freeholder and the build as one fixed-price contract.
Mayfair heritage & architecture: Renovating a flat · Kitchens in period flats · Licence to alter · Mansion flats · Conservation areas · Roof developments & conservation
Flat Refurbishment in Mayfair: Planning & Local Context
Westminster City Council · W1
Planning for flat refurbishment in Mayfair
Flat refurbishment in Mayfair 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 Mayfair's conservation areas and most mansion blocks.
Westminster City Council context
Mayfair W1 sits within Mayfair'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. Mayfair sits largely within the Grosvenor 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 Mayfair 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
See recent Mayfair work: Chesterfield Street, Mayfair Grosvenor Street, Mayfair. Explore our Kitchen Renovation Loft Conversions in Mayfair, or the Mayfair hub · Refurbishment Company in Mayfair.
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
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