Introducing Contemporary Glazing Within a Historic Townhouse
The architectural intent for Chester Street was to create a modern family home within the constraints of a listed building, carefully balancing heritage with contemporary design. Found Associates developed a strategy that replaced poor quality historic additions with a precise and minimal extension, allowing light to penetrate deep into the plan while maintaining the integrity of the original structure.
The rear extension was conceived as a vertical sequence of open living spaces, each connected visually and physically to the exterior through expansive glazing. Maintaining consistency across all levels was a key objective. The sliding door systems were designed to appear identical across each floor, ensuring a unified elevation while supporting different functional requirements at each level.
Designing with Limited Space, Heritage Constraints and Consistent Elevation
Working within a narrow Belgravia townhouse presented multiple architectural and technical challenges. The limited footprint required careful planning to ensure that each space felt open and connected without compromising privacy or usability. The listed status of the building imposed strict limitations on external appearance, requiring the contemporary extension to remain visually restrained and respectful.
A key challenge was achieving a consistent rear façade across three floors while accommodating differing functional needs. At ground level, the doors needed to provide access to the outdoor space. On the upper floors, they were required to act as large opening windows, allowing ventilation while ensuring occupant safety. This required an integrated solution that could combine sliding doors with discreet protective elements without altering the visual composition of the façade.
How the minimal windows® Sliding Door System Was Integrated to Resolve the Project Challenges
The minimal windows® sliding door system was integrated across all three levels of the extension to provide a consistent yet adaptable glazing solution. Each floor features a three track, three panel sliding configuration measuring 3.4m wide and 2.5m high. The repetition of this system ensures that the rear elevation reads as a single coherent design element.
On the upper floors, the sliding systems incorporate frameless glass balustrades within the opening sections. This allows the doors to open safely while maintaining an unobstructed appearance, enabling the upper levels to function as Juliet balconies without introducing visible barriers or disrupting the slim sightlines.
The frames and surrounding metal pressings were finished in a bronze anodised coating, offering a refined contrast to the masonry and adding depth to the façade. The ultra slim profiles ensure that the glazing remains visually recessive, allowing light and views to take precedence while supporting the calm architectural language of the project.
A Belgravia Townhouse Extension Defined by Sliding Glass Doors
The completed Chester Street project demonstrates how contemporary glazing can be carefully integrated into heritage architecture to enhance both spatial quality and everyday living. The use of sliding glass doors for a Belgravia extension allows each level of the home to engage with the outdoors while maintaining a consistent and elegant façade.
The project shows how minimal windows® systems can support highly considered residential design within constrained and sensitive contexts. By combining precision engineering with refined detailing, the glazing contributes to a home that feels open, balanced and tailored to modern family life within a historic setting.
For architects and developers working on townhouse extensions in prime London locations, this project offers a clear reference for integrating large scale sliding systems while maintaining architectural integrity. Our technical team can support similar projects with early stage design guidance and system specification.
