Builders in W1
Mayfair, Marylebone & Fitzrovia · Central London
Building and renovation in W1
W1 covers Mayfair, Marylebone, Fitzrovia, Soho, Portland Place, Marylebone High Street. W1 is Georgian and early-Victorian townhouses, purpose-built mansion blocks, converted upper floors above shops and offices, and mews houses behind the main streets. A large share of the residential stock is flats within buildings that also trade commercially at ground level.
Planning and consent in W1
Westminster covers almost all of W1 with conservation areas, and listing is common — often including interior fabric such as staircases, panelling and chimneypieces. Assume a full application rather than permitted development, and expect listed building consent to sit on the critical path.
Access and site logistics
Loading bays are booked, kerbside is scarce, congestion and ULEZ charges apply every working day, and noisy work is restricted to agreed hours. Mews access is often too tight for a full-size lorry, so we schedule small drops and fabricate joinery, stone and metalwork off site.
What we are usually asked for here
- Whole-apartment renovation and lateral conversions between adjoining flats
- Structural openings with engineer's calculations, party wall awards and freeholder consent
- High-specification joinery, stone and lighting fit-out installed to a fixed sequence
- Office, studio and clinic fit-out on upper floors above trading premises
We survey the property before pricing, confirm the constraints that apply to your specific address rather than the postcode, and issue a fixed price against a written scope. One site manager runs the trades from first fix to snagging.
District at a glance
- Postcode district
- W1
- Main localities
- Mayfair, Marylebone, Fitzrovia
- London region
- Central London
- Response time
- Site visit typically within 5 working days
Services we provide in W1
Loft conversions
Turn dead roof space into the best room in the house
Read more →House extensions
Rear, side-return, wrap-around and double-storey extensions
Read more →Home renovations
Whole-house refurbishment, stripped back and rebuilt properly
Read more →Kitchen renovations
Bespoke and designer kitchens, installed by one team
Read more →Bathroom renovations
Waterproofed properly, finished beautifully
Read more →Basement conversions
Dig-outs, tanking and habitable lower-ground space
Read more →Indoor swimming pools
Tanked, heated and environmentally controlled pool halls
Read more →Outdoor swimming pools
Concrete tanks, heating, covers and landscaped surrounds
Read more →Garden design
Terraces, planting, lighting and outdoor rooms
Read more →Landscaping
Hard and soft landscaping, levels, walls and drainage
Read more →Commercial construction
Refurbishment and fit-out delivered around your trading hours
Read more →Shop fit outs
Shopfronts, signage and retail fit-out that opens on time
Read more →Plumbing
Full re-pipes, bathroom services, boilers and hot water systems
Read more →Electrical
Rewires, consumer units, lighting design and certification
Read more →Carpentry
Bespoke joinery, wardrobes, staircases and structural carpentry
Read more →Roofing
Survey-led roof repairs, re-covering, flat roofs, leadwork and guttering
Read more →Basement waterproofing in W1
Most W1 below-ground space is original Georgian and Victorian vaulting under the pavement, plus lower ground floors under mansion blocks and shops. Solid brick retaining walls sit directly against London clay and made ground, so damp arrives through the wall face rather than as a single leak.
Because so much of the fabric is listed, we avoid cutting into historic brick. A Type C cavity drain membrane is fixed back mechanically, water is collected in a perimeter drainage channel and taken to a sump with twin pumps and a battery backup, and a studded floor membrane goes under the new screed so the finished room never touches damp structure.
A Type C cavity drain system in W1 is specified after a survey, designed to BS 8102 for the way you intend to use the room, and installed with the drainage channel, sump and pumps left accessible for maintenance. Read the full basement waterproofing and Type C cavity drain guide, or see how it fits into a basement and cellar conversion.
Waterproofing or damp proofing in W1?
Damp proofing deals with moisture in above-ground walls. Waterproofing protects a room that sits below ground against water pressure from outside. In Mayfair, Marylebone & Fitzrovia we decide which one the property needs at the survey, and often the answer is an external repair first.
How a W1 quotation works
We visit, find the source of the water, check head height, drainage outfall and any lease or listed-building constraints on your address, then issue a written scope and fixed price covering membrane, channel, sump and pumps and the finished room.
Kitchen and bathroom renovation in W1
Kitchen and bathroom remodelling in Mayfair and Marylebone covers strip-out, first-fix plumbing and electrics, any structural work, tiling, fixtures and joinery, managed by one site manager against a detailed written quotation.
Kitchen remodelling in W1
W1 kitchens are mostly in mansion-block flats, mews houses and apartments above commercial floors, so the work is shaped by lease consent, restricted working hours and service risers shared with neighbours. Extraction routes and gas supply often decide the layout before the cabinetry does.
Kitchen renovation in London →Bathroom remodelling in W1
Bathrooms here are usually internal rooms with no window, so mechanical extract, soil-stack position and acoustic separation to the flat below drive the design. Floors are often timber over historic joists, which we check before specifying stone or large-format tiles.
Bathroom renovation in London →Every W1 kitchen or bathroom quotation starts with a site survey: we check waste and stack positions, water pressure, extract routes, floor structure and any lease or conservation requirements for your address before pricing.
Garden designer in W1
W1 outdoor space is usually a roof terrace, mews courtyard or lightwell, so planters, lighting and drainage are planned around loading limits and building consents.
Outdoor space in central London is more often a roof terrace, lightwell, courtyard or communal garden than a lawn, so weight, drainage outlets, waterproofing beneath the finish and freeholder consent shape the design.
Our garden design and landscaping service covers layout, levels and drainage, planting, terraces and paths, garden lighting and external power, and how materials and plant reach the garden. In W1 that access question matters: Loading bays are booked, kerbside is scarce, congestion and ULEZ charges apply every working day, and noisy work is restricted to agreed hours. Mews access is often too tight for a full-size lorry, so we schedule small drops and fabricate joinery, stone and metalwork off site.
Garden designer London →Roofing in W1
W1 roof work often means parapet gutters, lead-lined valleys and plant decks on mansion blocks and townhouses, with access booked through managing agents.
Central roofs are often reached only through the building or from a scaffold licensed over a busy pavement, with parapet gutters, lead and plant areas that need careful inspection before any price is fixed.
Roofing work starts with a survey and photographs, then a written scope that states whether repair or replacement is recommended: pitched and flat roofs, leadwork and flashings, guttering and rainwater goods, and the scaffolding the roof needs. Planning, conservation and freeholder requirements for your address are confirmed at survey.
Roofing services London →Area guides inside W1
W1 portfolio examples
Illustrative concept case studies — not records of specific client contracts.
W1Plumbing · 2023
Marylebone Plumbing
Full re-pipe with new manifolds, pressurised hot water and modern sanitaryware. Sample case study set in Marylebone (W1).
View project →
W1Painting & Decorating · 2022
Marylebone Painting & Decorating
A full decoration package with sprayed joinery and hand-finished woodwork. Sample case study set in Marylebone (W1).
View project →
W1Garden Design · 2021
Marylebone Garden Design
A garden redesign with porcelain terrace, raised planters and layered exterior lighting. Sample case study set in Marylebone (W1).
View project →
W1UKitchen Renovations · 2024
Marylebone Walnut Broken-Plan Kitchen
Fluted walnut island with quartzite top, floor-to-ceiling walnut tall units, brass rail shelving and a bespoke banquette dining nook. Sample luxury kitchen case study set in Marylebone (W1U), fitted by the Foxter site team.
View project →
W1KKitchen Renovations · 2025
Mayfair Bronze & Quartzite Kitchen
Monolithic quartzite island and full-height stone wall panelling with mirrored bronze cabinet fronts and concealed pantry doors. Sample luxury kitchen case study set in Mayfair (W1K), fitted by the Foxter site team.
View project →