Ultra-Premium Builders in Mayfair
Exquisite renovations, bespoke restorations and luxury conversions for Mayfair's Georgian townhouses and prime W1K residences.
Exquisite Construction Services in Mayfair, W1K
Mayfair stands as London's most prestigious residential address, a neighbourhood of stately Georgian townhouses, grand period mansions and exclusive mews properties set around some of the world's finest squares — Berkeley Square, Grosvenor Square and Mount Street. This ultra-prime W1K postcode attracts an international clientele with the most exacting standards, commissioning renovation and restoration projects of exceptional ambition and refinement. Alstruct Ltd delivers construction services at the highest level throughout Mayfair, combining heritage expertise with luxury craftsmanship to produce results of genuine distinction.
Mayfair's architectural heritage is among the finest in Europe. Georgian townhouses of four, five and six storeys line streets such as Charles Street, Chesterfield Hill and South Audley Street, featuring grand reception rooms with ornate plasterwork, sweeping staircases, marble fireplaces and original panelling. Many properties are Grade I or Grade II* listed, demanding the most skilled craftsmen and meticulous restoration techniques. Alstruct's team includes specialists in heritage plasterwork, bespoke stone masonry, period joinery and decorative finishes, delivering restoration work that meets the exacting standards of English Heritage and the Grosvenor Estate.
The planning environment in Mayfair is among the most complex in London. The entire area falls within the Mayfair Conservation Area, most properties are listed, and many sit within the Grosvenor Estate which imposes its own architectural review process in addition to Westminster City Council's conservation controls. Alstruct has a proven track record of navigating this multi-layered approval process, preparing heritage impact assessments, detailed design proposals and listed building consent applications that secure approval while delivering the transformative results our clients expect.
Why Choose Alstruct in Mayfair?
- Proven expertise in ultra-prime Georgian townhouse restoration
- Experience with Grosvenor Estate approvals and Westminster conservation consents
- CHAS Elite, Constructionline Gold & FMB accredited
- Complimentary site survey and bespoke design consultation
- Dedicated project manager ensuring discreet, seamless delivery
- Master craftsmen in heritage plasterwork, stonework and period joinery
- Ultra-premium materials and finishes sourced to the highest specification
- Impeccable portfolio of luxury projects in prime Central London
Frequently Asked Questions — Mayfair
What approvals are needed for renovations in Mayfair?
Renovations in Mayfair typically require listed building consent from Westminster City Council, conservation area consent for any external changes, and — for properties on the Grosvenor Estate — separate architectural approval from the Estate's design review team. Alstruct manages all three approval processes, preparing comprehensive applications that satisfy each body's requirements. Even internal alterations to listed buildings require consent, so professional guidance is essential from the outset.
How much does a Mayfair townhouse renovation cost?
Ultra-premium townhouse renovations in Mayfair typically range from £500,000 to £2,000,000 or more for comprehensive refurbishments of large period properties. Costs of £4,000 to £7,000 per square metre are typical for the specification level Mayfair clients expect, including bespoke joinery, natural stone, premium fixtures and heritage restoration. Alstruct provides fully detailed quotations after a thorough survey and design consultation.
Can Alstruct deliver basement conversions in Mayfair?
Yes, basement conversions are among the most sought-after projects in Mayfair, where above-ground extension options are extremely limited. Alstruct delivers single and multi-level basement excavations beneath Georgian townhouses, creating luxury amenity spaces including swimming pools, home cinemas, wine cellars, staff quarters and car lifts. Westminster Council applies strict policies to subterranean development, and we manage every aspect from structural engineering to party wall agreements.
Does Alstruct work on Grosvenor Estate properties?
Yes, Alstruct has experience working on properties within the Grosvenor Estate, which covers much of Mayfair. The Estate maintains high architectural standards and conducts its own design review for proposed alterations. Our team understands the Estate's requirements and prepares proposals that meet their exacting criteria alongside Westminster Council's listed building and conservation area requirements.
Ultra-Premium Construction Services in Mayfair
Luxury Renovations
Complete Georgian townhouse transformations of the highest calibre, combining meticulous heritage restoration with contemporary luxury and bespoke interior design.
Learn more →Heritage Restoration
Expert restoration of period plasterwork, fireplaces, panelling, staircases and decorative stonework by master craftsmen using traditional techniques and materials.
Learn more →Basement Conversions
Single and multi-level basement excavation beneath Mayfair townhouses, creating ultra-luxury amenity spaces including pools, cinemas, wine cellars and car lifts.
Learn more →Loft Conversions
Discreet roof-level conversions within Mayfair's period rooflines, adding private suites and staff accommodation while preserving the architectural integrity of the streetscape.
Learn more →Structural Works
Expert underpinning, structural reinforcement and foundation work supporting the complex demands of renovation and basement excavation beneath Mayfair's listed buildings.
Learn more →Hard Landscaping
Bespoke natural stone terraces, elegant courtyard gardens and premium outdoor entertaining spaces befitting Mayfair's refined architectural setting.
Learn more →House extensions in Mayfair
Mayfair is Georgian townhouses on the Grosvenor estate, mews houses around Shepherd Market and Mount Street, and mansion flats and apartments in converted buildings. Mayfair extensions are basement and lower-ground projects, mews conversions and rear infills, all subject to listed building consent and estate approval.
As a guide, a well-built single-storey rear or side-return extension in Mayfair costs around £2,500–£4,000 per m² including structure, glazing and finishes, so a typical 25–30 m² kitchen extension lands between £75,000 and £120,000. Our house extension cost guide explains what moves the price. Mayfair is a conservation area and most buildings are listed, so nearly every external change needs listed building consent. We confirm permitted development rights at the first visit and handle any application to Westminster City Council through our in-house design team.
Loft conversions in Mayfair
Roof extensions in Mayfair are mansards or reconfigured top floors, agreed with Westminster City Council and the estate.
In London a Velux conversion costs £25,000–£45,000, a dormer loft with a bedroom and en-suite £45,000–£75,000 and a mansard £60,000–£100,000+; our loft conversion cost guide sets out what is included. We survey the roof structure, head height and stair position before we quote a Mayfair loft, so the figure reflects the actual roof rather than an assumption.
Renovations and refurbishment in Mayfair
Mayfair projects are high-end refurbishments of townhouses and apartments with bespoke joinery, stone and full services. Typical Mayfair refurbishments include structural openings with steel beams, new kitchens and bathrooms, rewiring, heating and period repairs such as sash windows, cornices and floors. Our Victorian terrace renovation cost guide gives realistic budgets, and every Mayfair project runs on a JCT contract with a written specification and our 10-year workmanship warranty.
Alstruct projects near Mayfair
Whitehall Park, Archway N19
Full Victorian terrace renovation and rear extension with triple glazing and aluminium sliding doors.
About 4 miles from Mayfair · View project →Hawthorn Cottage, Limehouse E14
Underpinning, ground and first-floor extensions and a full renovation with bespoke joinery.
About 5 miles from Mayfair · View project →Dunstan Road, Golders Green NW11
Rear extension, two-storey side extension and full renovation of a 1930s semi-detached house.
About 5 miles from Mayfair · View project →Beyond the projects above, we have recent and current sites in W4, W14, W6, N6, NW8, NW6, W11, W12 and SW6 within about five miles of Mayfair, and we work across every London borough from our office in South Woodford, E18. See all completed projects →
We Also Cover Areas Near Mayfair
Common questions about building in Mayfair
Do Alstruct cover Mayfair?
Yes, Alstruct regularly works on extensions, renovations and loft conversions across Mayfair and surrounding London neighbourhoods. We visit, measure and provide a written quote.
How much does a house extension cost in Mayfair?
House extensions in Mayfair typically cost £50,000–£200,000+ depending on size, specification and the property's existing structure. Georgian townhouses and luxury apartments are the most common build type in the area, and our quote will reflect the specific condition and layout of the property.
Do I need planning permission for an extension in Mayfair?
Mayfair sits in Mayfair Conservation Area, which means Permitted Development rights are restricted and most extensions require full planning permission from Westminster Council. We handle the planning application, design drawings and party wall notices on your behalf.
What types of property do you work on in Mayfair?
Most Mayfair projects we deliver are on Georgian townhouses and luxury apartments. We have direct experience with the structural, compliance and aesthetic considerations specific to these property types, including listed building consent work where applicable.
How quickly can Alstruct start a project in Mayfair?
Once design and approvals are signed off, we typically start on site in Mayfair within 6–12 weeks depending on programme availability. Planning + design adds 8–16 weeks before site start. For urgent projects, get in touch on 020 8080 8240 to discuss timing.
Are you accredited to work in Mayfair?
Yes. Alstruct holds CHAS Elite, Constructionline Gold and Federation of Master Builders (FMB) accreditation, with £10M public liability insurance, JCT contracts as standard, and a 10-year workmanship warranty on every project — including all work in Mayfair.
Nearby areas we cover
Alstruct works across every London borough. Here are areas close to Mayfair with dedicated local pages: