BUILDERS IN BELGRAVIA

Home Renovation · SW1
Builders in Belgravia | High-End Home Renovations, Extensions & Conversions SW1
FMB-registered building contractor with 15+ years' experience delivering residential renovation, extension, and conversion projects across Belgravia and Prime Central London

RESIDENTIAL CONSTRUCTION IN BELGRAVIA

Builders in Belgravia work within some of the tightest planning and heritage constraints in London. Grand stucco-fronted terraces, formal garden squares, London stock brick townhouses and mews houses behind — most dating from the early 19th century — all sit within the Belgravia Conservation Area under Westminster City Council.

Dominant Construction is an FMB-registered building contractor with 15+ years' experience delivering high-end residential renovation, extension, and conversion projects across Belgravia and Prime Central London — including £1M–£2M+ schemes. We work directly with private homeowners, property investors, and architects, managing the full construction process in-house.
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House Renovations in Belgravia


A substantial house renovation in Belgravia begins with understanding the building before work starts. On period properties this often involves opening-up investigations, structural calculations, temporary works planning, and coordination between the architect, structural engineer, and main contractor before construction commences.

Where original detailing contributes to the character of the property, the construction approach matters as much as the design. Brickwork may need matching to the existing façade, cornicing and mouldings reproduced rather than replaced, and existing timber, stone, or plasterwork protected rather than removed unnecessarily.

What Does a Home Renovation Cost in Belgravia?


Renovation costs in Belgravia typically run higher than the London average, driven by three factors: the scale of structural work, the specification of materials, and the complexity of working within a conservation area.

Name

Description
Average Cost

Kitchen Remodel Price

Full or partial kitchen update, including cabinetry, countertops, flooring, and appliances.

£35,000 to £80,000
Bathroom Renovation Price

Updates to fixtures (heated towel rail, extractor fans etc.), tiling, lighting, and storage for a refreshed bathroom.

An experienced bathroom installer can best advise here and consult with you on saving money.

£8,000 to £25,000
Living Room Renovation Price

Enhancements to flooring, lighting, wall finishes, and layout for improved comfort and style.

£8,000 to £20,000
Full House Renovation (mid -range)

Updates to flooring, closets, lighting, and wall treatments to create a comfortable retreat.

£200,000 to £500,000
Full House Renovation (high-spec + structural)

Customises space for productivity, including desk installation, shelving, and lighting.

£500,000 to £1,500,000+
External Façade Restoration

Comprehensive update across multiple rooms or entire home, including design, materials, and finishes.

£15,000 to £60,000

House Extensions in Belgravia

Belgravia's terraces and mews houses rarely allow much room to extend outward, and any external alteration needs to work with the property's original proportions rather than looking like a later addition. On the Grosvenor Estate specifically, extensions and external changes typically require estate freeholder consent alongside Westminster planning.

Kitchen Extensions

A kitchen extension in Belgravia requires careful coordination between structural openings, drainage, insulation, glazing, roof construction, and the existing rear elevation. On period properties the extension should work with the proportions and materials of the original house.

What Determines Extension Cost

  • Size, layout, and structural complexity
  • Type of extension — rear, side, or wrap-around
  • Materials, glazing specification, and roofing
  • Planning permission and Listed Building Consent, where applicable
  • Site access on narrow terraced or mews streets

Rear extensions in Belgravia: £120,000 – £300,000. Wrap-around extensions: £180,000 – £400,000. Double-storey extensions: £250,000 – £500,000, depending on specification.

Loft Conversions in Belgravia

Loft conversions in Belgravia offer one of the most effective ways to add space without extending the building's footprint — particularly relevant given how tightly the terraces are packed along streets like Eaton Place, Wilton Crescent, and Chester Square.
WHAT DOES A LOFT CONVERSION COST IN BELGRAVIA

Conversion Type

Typical Cost
Roof light (Velux)
£30,000 – £55,000
Dormer conversion
£70,000 – £130,000
Hip-to-gable conversion
£80,000 – £140,000
Mansard conversion
£100,000 – £180,000
L-shaped dormer
£90,000 – £160,000

Basement Conversions in Belgravia

Basement conversions turn underused cellar space into functional rooms — home cinema, gym, wine storage, or additional family living — without altering the external footprint of a property where extending outward isn't possible on most SW1 terraces.


Because Westminster's citywide Article 4 Direction removes permitted development rights for basement work borough-wide (in force since 2016), every basement excavation in Belgravia now requires full planning permission. Westminster City Plan Policy 45 additionally limits basements to a single-storey depth below the lowest original floor, and no more than 50% of the garden area may be excavated.

WHAT DETERMINES BASEMENT CONVERSION COST

Project Type

Typical Cost
Existing cellar conversion (no excavation)
£100,000 – £200,000
Full single-storey excavation
£300,000 – £600,000
Double-level or complex excavation
£600,000 – £1,200,000+

PLANNING PERMISSION, CONSERVATION AREAS & LISTED BUILDINGS

Belgravia sits within Westminster City Council, and virtually the entire district forms part of the Belgravia Conservation Area — recognised for its long stucco terraces, formal squares, and consistent classical detailing.


  • Full planning permission required for external alterations, extensions, roofline changes, and basement work
  • Listed Building Consent required in addition to planning permission where the property is listed
  • Westminster's basement Article 4 Direction has removed permitted development rights borough-wide since 2016
  • Belgravia Neighbourhood Plan (adopted March 2024) sets additional local policy
  • Grosvenor Estate freeholder consent may be required on top of council approval

FREQUENTLY ASKED QUESTIONS


Do I need planning permission for a house renovation in Belgravia?


It depends on the property, proposed works, and its planning history. Purely internal renovations of non-listed buildings generally don't require planning permission, though Building Regulations always apply. Any external alteration almost always requires a full planning application given Belgravia's conservation area status.


Do listed buildings require additional consent?


Yes. Alterations or extensions affecting the special architectural or historic character of a listed building require Listed Building Consent in addition to any planning permission.


Can you carry out basement construction in Belgravia?


Yes. Basement construction is part of our residential construction work, subject to the property's structural, planning, and site-specific requirements. Westminster's citywide Article 4 Direction means every basement excavation requires planning permission.


How long does a full house renovation take in Belgravia?


A standard full house renovation runs 4–8 months. Where structural works, basement excavation, or Listed Building Consent are involved, realistic timelines extend to 9–14 months including the planning stage.

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