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Brompton Housing, Chelsea
Residential Conversion + Rear Extension ㅣ 2 homes

Location : Chelsea, UK

Client : Developer

Year : 2021-2022

Stage: Concept design

The project explores the transformation of an enclosed basement and rear yard within a Victorian terrace on Old Brompton Road into two residential homes. With limited daylight and a rear patio enclosed by high boundary walls and neighbouring buildings, the existing condition presented a constrained and underused environment.

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The proposal places the rear courtyard at the centre of the design strategy, using it as the primary source of natural light, ventilation and outdoor amenity. Rather than extending across the entire site, the new accommodation is carefully positioned to retain open areas between the building and surrounding boundaries, allowing daylight to reach both the new and existing spaces.

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The basement is reorganised into two residential units, developed around the existing structural wall. A key element is a 5 sqm conservatory, creating a light-filled threshold between the living spaces and planted courtyard. Carefully positioned openings and varied building heights address privacy and overlooking, while external terraces extend the living environment outdoors.

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The project transforms a constrained basement condition into two compact, light-filled homes through a careful balance of built form, courtyard space, landscape and privacy.

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Description

- Located within a Victorian terrace on Old Brompton Road, the project explores the transformation of an enclosed basement and rear yard into two residential homes. The existing basement had limited daylight, while the rear patio was enclosed by high boundary walls and neighbouring buildings, creating a constrained and underused environment. 
 

- The design responds to these constraints by using the rear courtyard as the main source of light, air and outdoor amenity. Rather than extending across the entire site, the new accommodation is carefully positioned to retain open areas between the building and boundary walls, allowing daylight and sunlight to reach both the new and existing spaces. 
 

- The proposal develops the basement into two residential units, organised around the existing structural wall. The final design explores a one-bedroom home with a guest room and conservatory alongside a second one-bedroom home, with the arrangement developed through a series of design options. 
 

- The extensions are deliberately shaped in response to the neighbouring buildings. Differences in height and building line reduce the visual impact of the development, while openings are positioned carefully to address overlooking and privacy. The proposal also retains external terraces as an important part of the residential experience. 
 

- The 5 sqm conservatory becomes a key element of the final scheme, creating a light-filled threshold between the interior and the planted courtyard. Glazed openings connect the living spaces with the garden, while the restrained architectural language allows the existing brick walls to remain a strong part of the character of the project. 
 

- The project is ultimately about bringing light and landscape into a deeply enclosed urban condition. By carefully balancing built form, courtyard space, privacy and natural light, the proposal transforms a previously underused basement environment into two compact and connected homes.

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