Creating Light-Filled Living Spaces Within a Conservation Area
The architectural vision for Rawlings Street focused on overcoming the limitations of a typical period townhouse layout. Prior to renovation, the rear of the property was dominated by stairs and fragmented rooms that restricted natural light and weakened the connection to the garden.
Anthro Architecture reconfigured the circulation and opened up the rear of the house to create a more generous sequence of living spaces across two levels. The new double height dining area became the focal point of the home, with glazing used not only to increase daylight but to establish visual continuity between the interior, the garden and the upper floor accommodation.
Natural materials including limestone flooring, European oak joinery and polished plaster walls were selected to complement the architecture and create a calm, tactile environment where light becomes a key design material.
Maximising the Garden Opening Within a Narrow Rear Elevation
The dimensions of the rear opening presented a significant design challenge. The architects wanted to maximise access to the garden while preserving as much openable area as possible. Conventional sliding or bifold door systems would have reduced the available clear opening and introduced additional framing elements across the elevation.
The project also required a glazing solution that could function within a double height setting while working seamlessly alongside a structural glass roof. Careful coordination was required between the moving sash, fixed structural glazing, support steelwork and roof glazing to ensure the entire assembly performed as a single architectural element.
At the same time, the extension needed to respect its conservation area setting while delivering a contemporary, light-filled space suited to modern living.
How the minimal windows® Vertical Sash System Was Integrated to Resolve the Project Challenges
The minimal windows® vertical sash system provided an elegant solution that maximised the usable opening while reinforcing the architectural intent of the project.
Measuring 4.5m high and 1.8m wide, the double height sash window forms the principal garden-facing element of the extension. Rather than sliding horizontally, the moving pane rises vertically, allowing the opening to remain almost entirely unobstructed. This creates a direct connection to the patio while preserving the clean geometry of the glazed façade.
The sash operates manually through a concealed counterweight system hidden within narrow cavities on either side of the frame. By integrating these components within the wall construction, the design maintains a refined appearance while allowing the large glazed panel to move smoothly.
Above the sash, a fixed structural glass section connects directly to a frameless glass roof through a glass-to-glass junction. This arrangement creates a continuous glazed surface that wraps overhead, drawing daylight down into the lower ground floor and enhancing the sense of volume within the double height dining space.
The combination of vertical sash glazing and structural roof glass allows the extension to maximise both daylight and openness while remaining visually lightweight.
A Chelsea Townhouse Defined by a Double Height Sash Window
The completed Rawlings Street project demonstrates how a carefully considered glazing strategy can transform the experience of a traditional London home. By replacing a limited rear connection with a double height sash window in Chelsea, the house gains a stronger relationship with the garden, improved natural daylight and a greater sense of spatial generosity.
The project illustrates the potential of minimal windows® systems in conservation area renovations, where architectural ambition must be balanced with sensitivity to context. Through the integration of bespoke vertical glazing and structural glass, Rawlings Street achieves a contemporary living environment that feels both sophisticated and effortlessly connected to the outdoors.
For architects and homeowners exploring double height glazing, oversized sash windows or glazed side return extensions, Rawlings Street offers a compelling example of how innovative glazing can redefine a period property.
