A spacious Holland Park house gets a remarkable architectural transformation by David Money

Called in by longstanding clients to expand the footprint of this unusual west London house, the team at David Money Architects, aided by Festen Architecture, have wrought a spectacular transformation full of unique features

The staircase was an impressive technical feat: David and Fernando had a fight on their hands to get vast wall of glass installed in the first place, and it meant that the support for the stairs had to be disguised within the framing of the window. The other significant feat of engineering was building a basement under the entire footprint of the house. The clients wanted two things from this space: firstly it needed to contain a bar where they could throw parties without disturbing their neighbours, and secondly it was to house a spa, complete with a sauna, steam bath and cold and hot pools. Both are spectacular spaces in very different ways, though the designers’ and clients' shared love of Asian aesthetics informs them both. The spa is restrained with a suggestion of Japanese onsen baths, while the bar is an opulent riot of a room with exotic murals, infinity mirrors and a high-gloss ceiling, all influenced by the idea of the opium den.

The nightclub-style bar in the basement. The murals are by Milan-based studio Pictalab, and the lanterns are by Dimore Milano.

Michael Sinclair

The interiors were the work of Paris-based Festen Architecture, who worked closely with David and Fernando every step of the way, enhancing the generous, open rooms the architects were conjuring up. “The clients have an informal, spontaneous kind of lifestyle,” explains David, “so the brief was to avoid dividing the house up into compartmentalised formal spaces. It was very much about creating flow between the rooms, and also between the interiors and the garden.” The ground floor houses a set of expansive living spaces that open on to one another: a spacious kitchen that opens into a timber-clad dining room; a smart drawing room filled with art, and a more informal study and family room at the front of the house. The first floor houses an airy main suite complete with dressing room and bathroom, along with a guest room, while the children's rooms occupy the top floor.

The spa on the other side of the basement, with a selyana stone floor and matching baths with hefty stone rims.

Michael Sinclair

The studios collaborated on the luxurious materials that run throughout the rooms, such as the beautiful timber boards that unify each space, the characterful wood cladding in the dining room, and the lovely glazed bricks on the staircase. “We took inspiration from Victorian architecture," explains David, “where often a light well is clad in white glazed bricks. They continue from the garden into the stairwell, blurring the boundaries between the two.” Elsewhere, the aesthetic is cool and contemporary, filled with a stylish blend of vintage and modern furniture. "Festen’s interiors are exuberant in some parts, pared-down in others but everywhere an elegant and refined complement to our form" concludes David – “the perfect backdrop for entertaining and family life alike.”

davidmoney.com | festenarchitecture.com