Kitchen Extension Builders in Mayfair (W1J, W1K)
Professional kitchen extension builders in Mayfair, Central London.
Why Choose All Well for Kitchen Extensions in Mayfair?
Kitchen projects in Mayfair are more often about reconfiguration than extension. The Georgian townhouses don't have rear gardens to extend into, but they have generous lower-ground floors that can be transformed into stunning kitchen-dining spaces. We've worked on Mayfair properties where the lower ground floor was a warren of servants' rooms and storage, and turned it into a single open-plan kitchen with custom joinery, Gaggenau appliances, and stone floors. It's a different kind of project, but the skills are the same.
Every project comes with a fixed-price contract, single project manager, and full certification including Building Control sign-off.
Kitchen Extensions for Mayfair Properties
Mayfair is known for its georgian townhouses, period conversions, luxury apartments. Our kitchen extensions services are tailored to these property types, ensuring results that complement the character of your home.
Postcodes we cover: W1J, W1K, W1S
Kitchen Extensions Tip for Mayfair Homeowners
Westminster Council manages Mayfair planning, and virtually every property is listed and within the Mayfair Conservation Area. Any kitchen work, even moving an internal wall or changing a door opening, needs Listed Building Consent. The process takes 8-12 weeks and requires a heritage impact assessment. We work with a heritage consultant from day one so the application is right first time. Construction hours in Westminster are strictly limited, and neighbour notifications are mandatory for any works that may cause noise or vibration.
Kitchen projects in Mayfair's Georgian townhouses and mansion blocks
Three project types cover most of what we build in W1J, W1K, and W1S, each shaped by Mayfair's listed status and heritage requirements.
Lower-ground-floor kitchen reconfiguration in Georgian townhouses
The most common Mayfair project. Georgian townhouses have a lower-ground level that originally housed the kitchen, scullery, larder, and servants' quarters. We open the load-bearing walls with slimline steels (typically 152x89 UC and 178x102 UB depending on span and load), retain original chimneybreasts and decorative features, and create a single open-plan kitchen-dining-family space of 40-70 square metres. Build time 16-26 weeks. Listed Building Consent applies.
Mayfair mansion block and mews house kitchens
Luxury apartment kitchen renovation in mansion blocks on Audley Square, Hill Street, and Curzon Street is internal-only, with no extension possible. The work covers bespoke joinery, marble worktops, premium appliances, and any structural opening-up; build time 10-16 weeks. Section 20 leaseholder consultation and a Licence to Alter both apply, alongside Westminster Listed Building Consent. Mews house kitchen extension is possible where heritage impact is acceptable, using heritage materials and a luxury specification through a complex planning process; build time 24-36 weeks including planning. Listed Building Consent and full Westminster planning permission both apply.
Planning permission for kitchen work in Westminster's Mayfair Conservation Area
Three Mayfair-specific planning factors define every kitchen project. Westminster has some of the most demanding heritage policies for residential work in the country.
Listed Building Consent for Grade II and Grade II* Mayfair properties
Most Mayfair properties are Grade II or Grade II* listed, requiring Listed Building Consent for virtually any change: internal layout alterations, removal of original features (Adam-style fireplaces, ceiling plasterwork, timber staircases, panelling, cornicing), window or door replacements, render colour, and roof materials. Applications take 12-16 weeks at the City of Westminster, which has dedicated heritage officers. We work with specialist heritage consultants and conservation-specialist architects on every listed project. Listed Mayfair work demands more preparation and longer programmes than equivalent work on a non-listed property.
Mayfair Conservation Area rules and Westminster pre-application advice
Virtually every Mayfair property sits within the Mayfair Conservation Area. Westminster reviews any visible change individually and requires traditional London stock brick, lime mortar pointing, slate or natural-appearance roof material, and timber sash windows matched to the original. Front-facing changes are virtually never approved; rear and roof additions are assessed against the Conservation Area Appraisal guidelines. The Westminster pre-application advice service (4-6 weeks lead time) is essential before committing to designs, because it heads off refusals at formal application stage. Westminster also restricts construction hours to 8am-6pm Monday to Friday and 8am-1pm Saturday, with no Sunday or bank holiday working. Neighbour notifications are mandatory for any works that may cause noise or vibration.
The Mayfair kitchen project process, step by step
A Mayfair kitchen project runs 16-36 weeks and involves 16-22 trades. One project manager is assigned from survey through handover, with photo updates throughout.
Trades, fixed-price contracts, and Building Control on W1J and W1K projects
The trade sequence covers demolition, drainage (including cast-iron stack replacement under heritage requirements), structural steel, heritage brick and block matching, roofing, conservation-grade slim-profile double glazing in timber sash frames, lime-based plastering, specialist plaster restoration where original Adam-style ceilings are affected, electrics (NICEIC to BS 7671, with concealed routing through 18-24 inch solid walls without damaging original plaster or panelling), plumbing, gas (Gas Safe), bespoke kitchen joinery (Bulthaup, Boffi, Smallbone, or specialist heritage joiners), Calacatta or Statuario marble worktops, premium appliances (Wolf, Sub-Zero, Miele, Gaggenau, Quooker), tiling, hardwood flooring (French oak parquet or stone), heritage colours with hand-applied distemper or limewash on listed walls, gilding restoration, and French polishing of original timber. Fixed-price contracts cover labour, materials, structural engineer calculations for the steel and foundation design pack on listed Georgian townhouses, Building Control fees at Westminster, FENSA glazing registration, party wall surveyor coordination, conservation architect and heritage consultant fees, Listed Building Consent fees, planning fees, Section 20 leaseholder consultation and Licence to Alter coordination on mansion flat projects, and the Construction Management Plan. The price is fixed and confirmed after a free site visit, and does not change unless the specification does. Building Control inspections happen at structure, drainage, insulation (Part L: U-value 0.18 W/m²K for new walls and roof, with derogations for listed building fabric where compliance would harm heritage), and completion.
Kitchen Extensions in Mayfair: What's Included
How I price kitchen extensions in Mayfair
I price every kitchen extensions job in Mayfairafter I’ve seen it. No two properties are the same, so a number here would only mislead you. What you get instead is a fixed-price contract, a week-by-week programme, and no costs that turn up later.
Get a fixed quoteWhat Our Customers Say
“All Well managed our project from start to finish. The fixed-price contract meant no surprises, and the result is stunning.”
Verified Customer
Mayfair
“Professional team, clear communication throughout. They handled everything including Building Control sign-off.”
Verified Customer
Mayfair
Frequently Asked Questions
- How much does a Mayfair kitchen project cost?
- It depends on the property and the specification, so we confirm a fixed price after a free site visit. Lower-ground-floor kitchen reconfiguration on a Georgian townhouse is the most common Mayfair project, followed by luxury apartment kitchen renovation in a mansion block and, where consented, a mews house kitchen extension. Listed Building Consent on Grade II or Grade II* properties means more planning preparation and longer programmes than equivalent work on a non-listed property. Section 20 consultation and Licence to Alter apply on mansion flats, and a Construction Management Plan is required. The fixed price is agreed before any work starts.
- What's involved in working on a listed Mayfair property?
- Substantial planning preparation and longer build times. Most Mayfair properties are Grade II or Grade II* listed, requiring Listed Building Consent for virtually any change including internal layout alterations, removal or alteration of original features (Adam-style fireplaces, ceiling plasterwork, timber staircases, panelling, decorative cornicing), replacement of original windows or doors, render colour, and roof material. Application takes 12-16 weeks at the City of Westminster and runs in parallel with planning. We work with specialist heritage consultants and conservation-specialist architects experienced in Westminster requirements. Listed Mayfair work needs more preparation and a longer programme than equivalent work on a non-listed Kensington property.
- Can I extend a Mayfair townhouse?
- Rarely. Almost all Mayfair properties are listed and within the Mayfair Conservation Area, and Westminster's planning policy strongly resists external extensions that affect the historic streetscape. Front-facing changes are virtually never approved. Rear extensions on listed properties require Listed Building Consent and are only approved in limited circumstances with traditional materials and sympathetic proportions. Most Mayfair kitchen projects focus on lower-ground-floor reconfiguration, internal layout changes, restoration of original features, and upgrade of building services rather than physical extension. For clients seeking more space, basement excavation may be possible but faces strict Westminster basement policy with Basement Impact Assessment requirements.
- Why hire All Well for a Mayfair kitchen project?
- Three reasons. First, planning experience: we handle Listed Building Consent, Section 20 leaseholder consultation, Licence to Alter on mansion flats, Construction Management Plan, and Westminster pre-application advice alongside the build. We work with specialist heritage consultants and conservation-specialist architects on every listed project. Second, full accreditation: NICEIC for electrical (BS 7671), including concealed routing through 18-24 inch solid walls without damaging original plaster, panelling, or Adam-style ceilings, FENSA for glazing, Gas Safe registered for boiler relocation, structural engineer calculations included, and Building Control sign-off included on every project. Third, fixed-price contracts at ultra-luxury specification: the quote doesn't change unless the specification does, including heritage materials, hand-applied finishes, French polishing, gilding restoration, and luxury joinery and appliances (Bulthaup, Boffi, Smallbone, Wolf, Sub-Zero, Gaggenau). Office on Limes Avenue, SE20.
All Well has completed 100+ projects across 25 London boroughs since 2020. We are NICEIC approved for electrical work, FENSA registered for glazing, and CHAS certified for site safety, with Public Liability insurance to £5 million. 57+ Google reviews average 4.5 stars. All Well Property Services® is a UK registered trademark, Companies House no. 12721034, operating from Unit 1 Limes Avenue, Anerley SE20 8QR.
Kitchen Extensions Near Mayfair
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