Builders & Renovation Specialists in Mayfair
Kitchen extensions, loft conversions, bathrooms and full renovations in Mayfair, Central London (W1J)
NICEIC, FENSA and CHAS accredited. 57+ Google reviews averaging 4.5 stars. Free site visit, fixed-price quote.
About Mayfair
Mayfair is the pinnacle of London residential property — Georgian townhouses, elegant period conversions, and luxury apartments in one of the most exclusive postcodes in the world. Renovation work in Mayfair demands precision, careful project management, and experience working within Westminster's planning framework for heritage properties.
Postcodes we cover: W1J, W1K, W1S
Popular Services in Mayfair
Property renovation dominates in Mayfair, with full refurbishments of Georgian townhouses that can take 20-30 weeks and involve every trade from structural engineering to specialist decorative plasterwork. Bathroom fitting at the luxury end is a key service, with clients specifying bespoke marble, heated towel rails, and smart home integration. Painting and decorating work often involves period-appropriate finishes, specialist paint systems, and restoration of original decorative elements.
Planning & Building Control in Mayfair
Mayfair falls under the City of Westminster, and virtually every property is within the Mayfair Conservation Area. Most residential properties are Grade II or Grade II* listed, requiring Listed Building Consent for any alterations including internal works. Westminster has specific guidance on window replacement, lighting, signage, and external plant equipment. The planning process for listed buildings in Mayfair typically takes 8-12 weeks and requires detailed heritage impact assessments. We work with specialist heritage consultants and conservation architects for all Mayfair projects.
Mayfair Property Insights
Georgian townhouses in Mayfair typically have exceptionally thick walls (18-24 inches of solid brick or stone), high ceilings (3.5-4.0 metres), and elaborate original features including Adam-style fireplaces, ceiling plasterwork, and timber staircases. The construction quality is generally superb but the age of the buildings means electrical and plumbing systems are often outdated and need complete replacement. The clay subsoil beneath central London requires careful management for any structural work, and Mayfair properties are close to the Tyburn underground river, which can affect groundwater levels.
Common Projects in Mayfair
Full property renovation on a Georgian townhouse
The signature Mayfair project. Renovation of a Georgian townhouse typically involves complete electrical replacement to BS 7671 (the original wiring is usually 50+ years old and not compliant), full replumbing including replacement of original lead supply pipes, restoration of original sash windows and timber staircases, lime-based plaster repairs throughout, new bathrooms and kitchen at luxury specification, and complete decoration with heritage-appropriate finishes. Cost is from £750,000 depending on size and listed status. Build time 28-44 weeks with a single project manager, conservation-specialist architect, and heritage consultant. Listed Building Consent is required for virtually all works.
Luxury bathroom renovation
Mayfair bathrooms are renovated to ultra-luxury specification: bookmatched natural stone (typically Calacatta or Statuario marble), bespoke vanity units in walnut or oak with brass or polished nickel detailing, freestanding cast-iron baths from Drummonds or The Water Monopoly, brassware from Lefroy Brooks or Samuel Heath, frameless walk-in showers with rainshower heads, smart-home integration for lighting and heating, and underfloor heating throughout. Cost is from £45,000 for a master bathroom renovation. Build time 8-12 weeks. Listed Building Consent is required for any change to original features and runs in parallel with planning at Westminster.
Heritage decoration and restoration
Mayfair decoration involves period-appropriate colours and specialist finishes: hand-applied distemper or limewash on original lime plaster, restoration of Adam-style ceiling plasterwork using lime-based materials matched to the original, French polishing of original timber panelling and staircases, gilding restoration on original ornamental work, and historic colour matching using suppliers like Edward Bulmer, Papers and Paints, or specialist conservation paint manufacturers. Cost for a full luxury townhouse heritage repaint is £80,000-£250,000 depending on size, ornamental complexity, and restoration scope. Lead paint testing under HSE Control of Lead at Work guidance is essential on pre-1992 layers.
Westminster-compliant building services upgrade
Common as part of a larger renovation. Mayfair Georgian properties typically have outdated electrical and plumbing systems that need complete replacement to bring the property up to modern living standards while complying with Westminster's listed building requirements. Concealed conduit, surface-mounted wiring routes that don't damage original plaster, replacement of cast-iron soil stacks, upgrade to modern boilers (typically multiple combi or unvented systems for large properties), and integration of smart home systems for heating, lighting, and security. Cost is from £80,000 depending on property size. Build time 12-20 weeks, often run alongside other renovation work.
Our Services in Mayfair
Kitchen Extensions
We design and build kitchen extensions that turn cramped, separate rooms into open-plan spaces you actually want to cook and eat in.
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Bathroom Fitting
Full bathroom renovations, from stripping out tired suites to fitting walk-in showers, freestanding baths, and underfloor heating.
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Side Return Extensions
That narrow alley down the side of your terrace? We turn it into usable kitchen space.
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Loft Conversions
Add a bedroom, en-suite, or home office without moving house.
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Painter & Decorator
Clean lines, sharp edges, and a finish that lasts.
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Property Renovation
Whole-house renovations managed by one team — structural work, rewiring, replumbing, kitchens, bathrooms, and decoration.
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Damp Proofing
Damp ruins walls, damages health, and knocks thousands off your property value.
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Garage Conversions
Your garage is wasted space.
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End of Tenancy Painting
Tenants out Friday, painters in Monday, keys back by Thursday.
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Media Wall Installation
We design and build bespoke media walls — the framework, the joinery, the electrics, and the finish.
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Exterior Painting & Decorating
Exterior house painting that survives the British weather.
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Dormer Loft Conversions
We build rear and L-shaped dormer loft conversions on Victorian and Edwardian terraces across South London, adding full standing headroom and a proper top-floor room.
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Mansard Loft Conversions
A mansard loft conversion rebuilds the rear roof slope to a near-vertical wall at around 70 degrees, which gains the most floor space and headroom of any loft type.
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Hip to Gable Loft Conversions
A hip to gable loft conversion squares off the sloping hip end of a roof into a vertical gable wall, gaining real width and head height across the loft.
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Velux Loft Conversions
A rooflight loft conversion keeps the existing roof shape and fits skylights into the slope.
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Bungalow Loft Conversions
Turning a single-storey bungalow into a two-storey home by building into the roof space, usually with a hip-to-gable and rear dormer that add bedrooms and an en-suite upstairs.
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Wet Room Installation
A fully tanked, level-access wet room built around the drain: gradient floor, membrane carried to ceiling height and cured, then tiled.
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Walk-in Shower Installation
Walk-in showers built with frameless glass, a low-profile tray or level access, recessed tiled niches and proper tanking behind every tile.
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Microcement Bathrooms
A microcement bathroom gives you one continuous polished cement surface across walls and floor, with no grout lines for mould to colonise.
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Luxury Bathrooms
High-specification bathrooms built around natural stone, large-format porcelain and quality brassware, with freestanding baths, underfloor heating and layered lighting set out at the design stage.
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Interior Painting & Decorating
Interior painting and decorating across South London, from a single room to a full house.
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Commercial Painting
Commercial painting for offices, shops and communal areas across South London.
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Spray Painting & Kitchen Respray
Spray painting that gives a factory-flat finish brush and roller cannot reach.
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Handyman & Property Maintenance
A reliable local handyman backed by a proper building firm.
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Gutter Cleaning
We clear blocked gutters and downpipes on terraces, semis and larger houses across South London, then check the falls and the joints while we are up there.
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Furniture & Flat-Pack Assembly
Flat-pack wardrobes, beds, chests and units built square and solid, with every fixing seated so nothing wobbles and tall pieces anchored to the wall.
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Fence Repair
Storm-damaged and rotten fences put right across South London.
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TV Wall Mounting
A TV mounted properly, fixed into studs or masonry to hold the weight, set level at the right height, with the cables run out of sight rather than left hanging down the wall.
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What Customers Say
“So happy with the work done by Les and Richard!! We bought a house that needed new paint, cracks filled, a new bathroom fan and some mold removal and they did it all. The quality of the work is phenomenal; it looks like a brand new house. We’ll definitely be hiring them for our future projects!”
Brenna Bodine
3 months ago
“So happy with Joel’s work in refurbishing my flat. There was no job too big or small for him and all done to a high standard. I won’t hesitate to use him again!”
Callum Stone
4 months ago
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.
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Frequently Asked Questions
- 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, replacement of original windows or doors, render colour, roof material, and even paint type changes. Application takes 12-16 weeks at the City of Westminster and runs in parallel with planning. We work with specialist heritage consultants, conservation-specialist architects, and structural engineers experienced in Westminster requirements. Listed Mayfair work typically costs 50-100% more than equivalent work on a non-listed Kensington property.
- Why is the planning process longer in Mayfair than in other boroughs?
- Three reasons. First, Westminster has high application volumes and longer determination times than outer boroughs — typical Listed Building Consent takes 12-16 weeks rather than the 8-12 weeks of other authorities. Second, Mayfair's heritage status means each application requires detailed heritage impact assessments, conservation statements, and often pre-application consultation with Westminster's heritage team. Third, the City of Westminster's pre-application advice service typically takes 4-6 weeks alone, but it's essential before committing to designs to avoid costly refusals at the formal application stage.
- How are utilities upgraded on Mayfair Georgian properties?
- Carefully and within listed building constraints. Original electrical wiring on Mayfair Georgian properties is typically 50+ years old and not compliant with BS 7671 — full replacement is necessary as part of any renovation. The challenge is routing modern wiring through 18-24 inch solid walls without damaging original plaster, panelling, or decorative features. We typically use concealed conduit running through original chase routes, surface-mounted wiring in non-visible utility areas, and skirting-board cable runs in habitable rooms where conduit isn't viable. Lead supply pipes (common on pre-1970 properties) are replaced as part of any replumbing work. All work is signed off by a NICEIC-registered electrician and the Building Control completion certificate is included.
- Can I extend a Mayfair property?
- 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 renovation work focuses on internal reconfiguration, restoration of original features, and upgrade of building services rather than physical extension. For clients seeking more space, basement conversion may be possible but faces strict Westminster basement policy requirements.
Get a Free Quote in Mayfair
Tell us your project and we will book a free site visit, then send a fixed-price quote in writing. No obligation.