A future-oriented transformation

The Single to Duplex House shows how an existing single-family home can evolve into a two-family residence without sacrificing quality of life. Located in a low-density neighborhood of detached houses, the project offers a model for subtle densification. Responding to the client’s vision for long-term sustainability, the renovation not only added space but also reduced ecological impact through thoughtful upgrades.

Maintaining structure, expanding potential

The 1960s house was largely preserved, with thermal renovations improving energy performance. An open staircase was added and the attic extended to form a light-filled upper unit. The lower unit connects directly to the garden, while the upper floor opens onto a sheltered loggia. Large openings and vertical continuity foster a strong connection between the two homes, allowing for both independence and visual flow.

Material shift and energy upgrade

Replacing the original oil heating system, the house is now powered by geothermal energy, made possible by an upgraded outer shell. The former plaster facade with its modest windows has been reinterpreted in timber, lending warmth and a new architectural identity to the building. The transition from mineral to wood not only reflects a material change but also signals a generational shift in values.

Between private and shared outdoor spaces

The expansion introduced additional outdoor areas that serve both as circulation and leisure zones. These new thresholds create semi-private spaces that enhance daily living, while maintaining a connection to the surrounding garden context. By balancing density with livability, the project reimagines suburban housing as adaptable and future-ready.

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