Transforming Mozart House: A Sculptural Extension in London's Historic Belgravia (2026)

In the heart of London's Belgravia Conservation Area, a remarkable architectural transformation has taken place at Mozart House. This historic Georgian terraced home, where Mozart composed his first symphony as an eight-year-old, has been given a contemporary twist by Studio Dera. The result is a captivating blend of old and new, a testament to the power of architectural innovation.

A Landscape-Inspired Extension

Studio Dera's approach to the extension was unique and imaginative. Instead of a conventional addition, they envisioned the project as an integral part of the landscape. By excavating and expanding the basement pool, they created a new bedroom and a cozy lounge, both overlooking sunken courtyards. This design choice not only maximized space but also created a seamless connection between the interior and the garden.

"The deep rear garden allowed us to think beyond traditional extensions. We wanted to create something that felt like an extension of the garden itself," says Marcel Rahm, co-founder of Studio Dera.

The extension's bold use of glass-reinforced concrete (GRC) is a standout feature. The sculptural panels frame full-height windows, offering breathtaking views of the stacked courtyards. This material choice adds a modern touch while respecting the historical context of the building.

An Episodic Journey

As you move through Mozart House, the experience is described as an "episodic journey." From the main living area, you enter a glazed corridor that leads to the garden. Here, full-height sliding doors open up to an upper courtyard, with a staircase descending into the lower one. This carefully curated sequence of spaces creates a sense of discovery and intrigue.

The ground-floor bedroom, designed as a garden pavilion, is a highlight. Its narrow, deep-set frame and large sliding glass doors create a seamless transition between indoors and outdoors. It's a space that feels like a natural extension of the garden, blurring the boundaries between architecture and landscape.

"We aimed to create a sense of openness and repose. The excavation grounds the project, while the lighter pavilion elements add a delicate touch," Rahm explains.

A Delicate Balance

The use of GRC is a key element in achieving this delicate balance. The sculptural concrete intervention, particularly in the new bedroom, contrasts with the weight of the excavation. It's a thoughtful approach that ensures the extension doesn't overpower the original Georgian house.

Both courtyards are beautifully landscaped, with paved surfaces and large planters filled with trees and shrubs. Translucent walk-on glass in the upper courtyard provides natural light to the spaces below, further enhancing the connection between the interior and exterior.

Inside, the finishes are carefully selected to create a timeless and tactile atmosphere. Travertine, timber, and textured lime plaster echo the exterior's GRC elements, creating a cohesive and harmonious design.

A Trend in London's Architecture

Studio Dera's extension is part of a broader trend in London's architectural scene. Other notable projects, such as Komorebi by ConForm and Druid Grove by CAN, showcase innovative approaches to residential extensions. These designs push the boundaries of traditional architecture, incorporating elements like perforated floors, cave-like openings, and green timber tendrils.

"London's architecture is evolving, and these extensions are a testament to the city's creative spirit. They demonstrate a unique blend of historical respect and contemporary innovation," says an architectural critic.

Conclusion

Mozart House's transformation by Studio Dera is a masterpiece of architectural ingenuity. It showcases how a thoughtful approach to design can create a seamless fusion of old and new, resulting in a space that is both functional and aesthetically captivating. This project is a reminder that architecture, when done right, can enhance our living environments and inspire us daily.

"It's these kinds of projects that elevate the urban landscape and make London such an exciting city for architecture enthusiasts," concludes Rahm.

Transforming Mozart House: A Sculptural Extension in London's Historic Belgravia (2026)
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