Luxury Builders in Belgravia
Premium house extensions, renovations and loft conversions in Belgravia, London.
Local construction company in Belgravia
Belgravia is one of the world's most prestigious residential addresses, a masterpiece of Regency urban planning characterised by grand stucco-fronted townhouses arranged around elegant garden squares. Developed by Thomas Cubitt in the 1820s, this exclusive enclave in the heart of SW1 demands construction work of the very highest calibre. Alstruct Ltd delivers meticulous, heritage-sensitive construction services for Belgravia's discerning homeowners, combining traditional craftsmanship with contemporary engineering excellence to preserve and enhance these irreplaceable architectural treasures.
The majority of Belgravia's residential properties are Grade I or Grade II listed, situated within one of London's most strictly controlled conservation areas. This means every element of construction — from external stonework restoration and window replacement to internal reconfiguration and service upgrades — must be executed with absolute precision and full regulatory compliance. Alstruct's specialist team understands the exacting requirements of working with listed buildings, sourcing heritage-grade materials, employing traditional construction techniques where required, and integrating modern building services discreetly within historic fabric.
Working in Belgravia requires an intimate understanding of the City of Westminster's planning and conservation framework. Listed building consent, conservation area controls and the specific requirements of Belgravia's estate management all demand careful navigation. Alstruct's experienced team prepares comprehensive applications, commissions specialist heritage assessments, and liaises directly with Westminster's conservation officers and the Grosvenor Estate to secure the approvals your project requires, ensuring a seamless path from design concept to exquisite completion.
Why Choose Alstruct in Belgravia?
- Specialist expertise with Grade I and Grade II listed buildings
- Deep understanding of Westminster conservation area controls
- CHAS Elite, Constructionline Gold & FMB accredited
- Heritage-grade materials and traditional craftsmanship
- Dedicated project manager for discreet, meticulous delivery
- Experience working with Grosvenor Estate requirements
- Confidential, fully itemised quotations
- Outstanding portfolio of ultra-premium London projects
Frequently Asked Questions — Belgravia
Do I need listed building consent for works in Belgravia?
Almost certainly. The vast majority of Belgravia's residential stock is listed Grade I or Grade II. Listed building consent is required for any works, internal or external, that would affect a building's character or historic fabric. Alstruct has extensive experience liaising with Westminster's heritage and conservation officers to secure the consents your project requires.
What are the conservation area restrictions in Belgravia?
The Belgravia Conservation Area is one of the most strictly controlled in London. Permitted development rights are severely curtailed: virtually any external alteration requires planning permission, and materials must match the original Cubitt-era palette precisely. Alstruct has an outstanding record navigating Westminster's conservation framework.
Can I create a basement beneath my Belgravia townhouse?
Yes, luxury basement development is one of the most sought-after transformations in Belgravia, where above-ground expansion is severely constrained. Westminster's Basements Supplementary Planning Document sets out detailed requirements including structural surveys and drainage strategies. Alstruct's specialist basement team delivers exceptional subterranean spaces to the very highest standard.
How much does a renovation cost in Belgravia?
Ultra-premium renovations in Belgravia typically range from £6,000 to £12,000 or more per square metre, reflecting listed building constraints, heritage materials and specialist craftsmanship. Full townhouse renovations commonly range from £1 million to several million pounds. Alstruct provides a confidential, fully itemised quotation following a private consultation.
Construction Services in Belgravia
Heritage Renovations
Meticulous whole-house and townhouse renovations preserving Belgravia's Regency character while integrating contemporary luxury and modern building services.
Learn more →Luxury Basement Conversions
Bespoke subterranean living spaces beneath Belgravia's townhouses, from home cinemas and wine cellars to gymnasiums and staff quarters.
Learn more →Sensitive Extensions
Carefully designed rear extensions and orangeries that complement the listed heritage of Belgravia's Cubitt-era properties.
Learn more →Loft Conversions
Discreet loft conversions within Belgravia's distinctive rooflines, adding valuable accommodation while respecting strict conservation controls.
Learn more →Structural Works
Expert underpinning, foundations and structural alterations supporting the complex engineering demands of Belgravia's historic building stock.
Learn more →Garden & Exterior Works
Premium garden landscaping, railings restoration and exterior stonework repairs befitting Belgravia's world-class streetscapes.
Learn more →House extensions in Belgravia
Belgravia is Grade II listed stucco terraces on the Grosvenor estate, mews houses and mansion flats around Eaton Square, Chester Square and Elizabeth Street. Extensions in Belgravia mean lower-ground and basement work, rear closet-wing infills and mews conversions, all needing listed building consent and often estate approval.
As a guide, a well-built single-storey rear or side-return extension in Belgravia 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. The whole of Belgravia is a conservation area and most buildings are listed, so Westminster City Council and the Grosvenor estate must approve almost any external change. 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 Belgravia
Roof alterations are tightly controlled: mansard roof extensions and reconfigured top floors are possible on some terraces and mews, subject to listed building consent.
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 Belgravia loft, so the figure reflects the actual roof rather than an assumption.
Renovations and refurbishment in Belgravia
Belgravia projects are high-specification refurbishments of townhouses and lateral apartments: joinery, stone, lime plaster and full services replacement. Typical Belgravia 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 Belgravia project runs on a JCT contract with a written specification and our 10-year workmanship warranty.
Alstruct projects near Belgravia
Whitehall Park, Archway N19
Full Victorian terrace renovation and rear extension with triple glazing and aluminium sliding doors.
About 5 miles from Belgravia · View project →Hawthorn Cottage, Limehouse E14
Underpinning, ground and first-floor extensions and a full renovation with bespoke joinery.
About 5 miles from Belgravia · View project →Lyal Road, Bow E3
Victorian terrace: ground-floor lowering, underpinning, flat-roof extension and large roof glazing.
About 5.5 miles from Belgravia · View project →Beyond the projects above, we have recent and current sites in W4, W14, W6, NW8, NW6, W11, W12 and SW6 within about five miles of Belgravia, and we work across every London borough from our office in South Woodford, E18. See all completed projects →
We Also Cover Areas Near Belgravia
Common questions about building in Belgravia
Do Alstruct cover Belgravia?
Yes, Alstruct regularly works on extensions, renovations and loft conversions across Belgravia and surrounding London neighbourhoods. We visit, measure and provide a written quote.
How much does a house extension cost in Belgravia?
House extensions in Belgravia typically cost £50,000–£200,000+ depending on size, specification and the property's existing structure. Stucco-fronted regency townhouses 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 Belgravia?
Belgravia sits in Belgravia 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 Belgravia?
Most Belgravia projects we deliver are on Stucco-fronted Regency townhouses. 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 Belgravia?
Once design and approvals are signed off, we typically start on site in Belgravia 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 Belgravia?
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 Belgravia.
Nearby areas we cover
Alstruct works across every London borough. Here are areas close to Belgravia with dedicated local pages: