House Extensions in Belgravia, SW1X
Rear, side-return, wraparound and double-storey extensions for houses in Belgravia, designed, approved and built by one team.
Covered under one contract
- Architectural and structural design
- Planning or lawful development certificate
- Foundations, walls, roof and steels
- Glazing, rooflights and doors
- Kitchen designed and fitted
- Building control and party wall handled
House Extensions in Belgravia.
An extension is the surest way to get the open-plan kitchen and dining room most families want, and the houses in Belgravia generally lend themselves to it: a side return to fill, a rear garden to build into, or on larger plots room for a full-width or double-storey addition.
We design the extension around how you will use it, not around the maximum footprint the rules allow. That means thinking about light, the level change to the garden, where the kitchen sits, how the old and new parts of the house meet and what happens to the rooms you already have. The structural engineering, party wall matters and building control inspections are all handled by us.
Approvals are checked on the first visit. Many single-storey rear extensions fall within permitted development, but the City of Westminster applies tighter rules in conservation areas and to flats and listed buildings, so we confirm the route before any drawings are produced and then manage the application if one is needed.
- Area
- Belgravia, SW1X · SW1W
- Council
- City of Westminster
- Housing
- Grade II listed white stucco terraces and squares by Thomas Cubitt, mews houses, embassies converted back to homes, and apartments
- Transport
- Sloane Square, Victoria, Hyde Park Corner
- Rear or side return, on site
- 10 to 16 weeks
- Design and approvals
- 8 to 14 weeks before start
- Glazing lead time
- 6 to 10 weeks, ordered early
- Consent
- Permitted development or householder application
- Party wall
- Notices served by us
Belgravia: the houses and the planning rules.
Belgravia was built by Thomas Cubitt for the Grosvenor estate in the 1820s and 1830s and it has barely changed since: cream stucco terraces around Eaton Square, Belgrave Square and Chester Square, with cobbled mews behind. The whole district is a conservation area, most houses are listed, and the Grosvenor estate remains the freeholder of much of it.
Work here is nearly always to a listed building, which means listed building consent, a heritage statement and an approach that treats the historic fabric as the priority. Within that we fit kitchens, bathrooms, joinery and services to modern standards, and convert mews houses into complete homes.
The Belgravia Conservation Area covers the whole district, and the majority of the houses are Grade II or II* listed.
Westminster City Council
Westminster decides planning and listed building applications for the whole of Belgravia, with detailed conservation area guidance and long-standing policies on roof extensions and basements.
Grosvenor estate
Grosvenor's own consent is required for most alterations on the estate, with its own design guidance and surveyors.
Listed interiors
Cornices, staircases, chimneypieces and joinery are part of the listing; changes need consent and specialist trades.
Approvals for house extensions in Belgravia.
Many single-storey rear extensions are permitted development within the 3 or 4 metre limits, or 6 and 8 metres under prior approval. Conservation areas, flats, listed buildings and larger schemes need a householder application, and every extension needs building regulations approval.
Westminster decides planning and listed building applications for the whole of Belgravia, with detailed conservation area guidance and long-standing policies on roof extensions and basements.
What house extensions in Belgravia includes.
- Architectural and structural design
- Planning or lawful development certificate
- Foundations, walls, roof and steels
- Glazing, rooflights and doors
- Kitchen designed and fitted
- Building control and party wall handled
From site visit to handover.
- 01
Site visit & consultation
We visit, listen and measure. Brief, budget and constraints understood before any advice is given.
- 02
Design & itemised quote
Our architects and engineers draw the scheme, and from that we provide a transparent, itemised quotation for your approval.
- 03
Planning & approvals
Planning applications, building control and party wall matters handled for you.
- 04
Build, managed weekly
Our own trades, sequenced by a site manager. Progress reported every week.
- 05
Handover & aftercare
Joint snagging walk-through, documentation, and a guarantee on our workmanship.
House Extensions in Belgravia: your questions.
Do I need planning permission for an extension in Belgravia?
Not always. Permitted development covers many single-storey rear extensions on houses, but the City of Westminster removes those rights in some conservation areas, and flats and listed buildings always need an application. We confirm the route at the site visit.
How long does an extension take to build?
Ten to sixteen weeks on site for a single-storey extension once approvals are in place, plus the design and approval period beforehand. Glazing has the longest lead time, so we order it early.
Which parts of Belgravia do you cover?
All of Belgravia and SW1X · SW1W, including Eaton Square, Chester Square, Belgrave Square, Elizabeth Street, Eaton Terrace, Chester Row, and the neighbouring districts. We are based in London and our teams work across central, north, north-west, west and south-west London.
Other services in Belgravia.
House Refurbishment in Belgravia
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Flat Refurbishment in Belgravia
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Structural Alterations in Belgravia
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Loft Conversions in Belgravia
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Basement Conversions in Belgravia
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Kitchen Renovation in Belgravia
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Bathroom Renovation in Belgravia
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Bespoke Joinery & Fitted Furniture in Belgravia
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Architectural & Interior Design in Belgravia
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Planning Permission & Building Regulations in Belgravia
Read moreHouse Extensions across London.
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We will visit, listen and explain what is possible for your property and how it would be approved. No pressure, no sales pitch.