House Extensions in Chelsea, SW3
Rear, side-return, wraparound and double-storey extensions for houses in Chelsea, 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 Chelsea.
An extension is the surest way to get the open-plan kitchen and dining room most families want, and the houses in Chelsea 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 Royal Borough of Kensington and Chelsea 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
- Chelsea, SW3 · SW10
- Council
- Royal Borough of Kensington and Chelsea
- Housing
- Victorian terraces and stucco houses, artists' studios, mews, mansion flats and new-build developments
- Transport
- Sloane Square, South Kensington
- 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
Chelsea: the houses and the planning rules.
Chelsea runs from the red-brick and stucco terraces off the King's Road to the riverside streets around Cheyne Walk. The housing is mostly Victorian, much of it listed, in a dense patchwork of conservation areas policed by the Royal Borough, which is known for strict basement and roof policies.
Our work in Chelsea includes a development of six apartments where we designed, supplied and fitted matching kitchens and wardrobes to the developer's programme. Whether it is one house or a whole building, the same rules apply: careful drawings, early approvals and a build that respects the neighbours.
The Chelsea, Royal Hospital, Cheyne and Chelsea Park/Carlyle conservation areas cover most of the district.
Royal Borough of Kensington and Chelsea
RBKC decides applications. Its basement policy limits basements to a single storey under part of the garden, and it takes a firm line on roof extensions and rear elevations.
Conservation areas
Almost all of Chelsea is within a conservation area. Article 4 directions remove permitted development rights on many streets, so extensions generally need a full application.
Developments and flats
In new and converted buildings, works are coordinated with the freeholder or developer and delivered to a fixed programme.
Approvals for house extensions in Chelsea.
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.
RBKC decides applications. Its basement policy limits basements to a single storey under part of the garden, and it takes a firm line on roof extensions and rear elevations.
What house extensions in Chelsea 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 Chelsea: your questions.
Do I need planning permission for an extension in Chelsea?
Not always. Permitted development covers many single-storey rear extensions on houses, but the Royal Borough of Kensington and Chelsea 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 Chelsea do you cover?
All of Chelsea and SW3 · SW10, including King's Road, Cheyne Walk, Sloane Street, Old Church Street, Chelsea Manor Street, Flood Street, and the neighbouring districts. We are based in London and our teams work across central, north, north-west, west and south-west London.
Our work near Chelsea.
Other services in Chelsea.
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Flat Refurbishment in Chelsea
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Structural Alterations in Chelsea
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Loft Conversions in Chelsea
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Basement Conversions in Chelsea
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Kitchen Renovation in Chelsea
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Bathroom Renovation in Chelsea
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Bespoke Joinery & Fitted Furniture in Chelsea
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Architectural & Interior Design in Chelsea
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Planning Permission & Building Regulations in Chelsea
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.