Casa da Azenha, a house built inside a ruined watermill near Lisbon

Just north of Lisbon, in Arruda dos Vinhos, the local studio (Umtodo) architects has turned a ruined watermill into a family house without stepping outside the old building's footprint. Only fragments survive: pieces of the thick outer wall and an internal retaining wall, kept to mark the shift between the house's three levels. Every original opening in the mill has been preserved and used to set out the new doors, windows and plan.

You enter at road level, once the mill's upper floor, into a reception room that rises into the pitched roof around a central fireplace. Stairs lead up to the kitchen and dining area, where a large frameless window looks across the valley. Below the kitchen, two bedrooms are set almost into the hillside, giving them a cell-like, monastic calm quite unlike the bright rooms above.

The new structure is a single grey-rendered volume shaped like the archetypal house, which the architects say is meant to stress the contrast between the permanent ruin and the new insertion. Against the honey-coloured stone, it reads clearly as something added rather than restored.

The studio is led by João Pedro Cavaco with Hélia Pereira and Rafael Jaleco. This is a private home, so it's one to admire in pictures, especially if you like ruins given a second life.

Our summary of a story from Wallpaper*, published 3 November 2026. Read the original

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