Kelleveld House by MAMOUT + Stéphanie Willocx: A Harmonious Revival in Nature

Nestled in the lush forests of Hoeilaart, Belgium, the Kelleveld House is an architectural gem that beautifully blends history, nature, and modern design. Originally part of a trio of pavilions conceived in 1962 by architect Y. Loze, the house was initially designed for mezzo-soprano Christiane Van Acker as a tranquil retreat deeply connected to the surrounding landscape. Its glass-walled structure was intended to dissolve boundaries between indoor and outdoor spaces, allowing residents to experience an uninterrupted relationship with nature.

Over the decades, the home underwent various modifications by successive owners, which gradually obscured its original intent. Additions and alterations diminished the purity of its original design, leaving behind a structure that had lost its coherence. Recognizing its architectural significance, MAMOUT and Stéphanie Willocx undertook a sensitive renovation to restore its essence while adapting it for contemporary living.

A Design Approach Rooted in Preservation and Transformation

The renovation strategy prioritized respecting the original character of the house while introducing subtle yet impactful transformations. The project began with the removal of non-original elements that disrupted the home’s spatial integrity. By stripping back excess modifications, the architects reinstated the clarity of the original volumes and enhanced the home's openness.

One of the most significant interventions was the reconfiguration of circulation within the house. A newly designed stair tunnel was introduced to connect the split levels, leading all the way down to the previously half-buried garage, which was repurposed into bedrooms. This intervention not only improved accessibility but also strengthened the house’s vertical connection across different levels.

By restoring the home’s fundamental architectural qualities and enhancing its functionality, the renovation breathes new life into the space while preserving its historical spirit.

Blurring the Boundaries Between Indoors and Outdoors

A defining feature of the Kelleveld House has always been its deep connection to nature. The house sits within a dense, verdant landscape, where the interplay of light, glass, and foliage creates a seamless dialogue between architecture and the environment.

As part of the renovation, the garden was reimagined following a "naturalist punk garden" concept. This landscape approach embraces a wild, biodiverse aesthetic, incorporating hundreds of plant species that enhance the organic feel of the site. Unlike traditional garden designs that impose rigid structure, this approach allows nature to take its course, reinforcing the home’s identity as a retreat immersed in the wilderness.

The absence of physical barriers between the home and garden further strengthens this relationship. Large glazed surfaces and strategic openings create an ever-present dialogue between the interior and exterior, ensuring that the changing seasons and natural rhythms remain an integral part of daily life.

A Timeless Architectural Statement

Through this careful restoration, MAMOUT and Stéphanie Willocx have successfully preserved the architectural integrity of Kelleveld House while making it relevant for modern living. The project stands as a testament to the importance of sensitive renovation, demonstrating that thoughtful interventions can enhance both aesthetic and functional aspects of heritage architecture.

Today, the house once again embodies the original vision of Y. Loze, offering a harmonious balance between structure, nature, and contemporary comfort. The result is not just a home but a living experience that celebrates timeless design and environmental synergy.

All Photographs are works of Séverin Malaud