
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 →Roofing
Slate, tile, flat roofs, leadwork and full re-covers
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 →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.
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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 →