Extension to a private house, Stockholm
Wedge Extension is a proposal for an extension to a private house from the 1920s in Mälarhöjden, Stockholm. The house stands on a 650 sqm irregular plot at the end of Mälarhöjdsvägen, where the small-scale single-family housing structure of Mälarhöjden meets the larger scale of Bredäng.
The plan allows for a relatively large extension, but the buildable area is limited to a thin wedge of land on the east of the existing house. We’ve let the wedge shape inform the structure and form of the extension. The plan is based on a mirror-symmetrical, leaf-shaped structure where exterior walls and a longitudinal central beam carry transversal beams perpendicular to the central beam. A concrete basement carries two wooden stories. The basement houses a spa, the two stories above house bedrooms, a bathroom, and a common room. The original house and the extension are connected via a narrow glass link. Along the south façade towards the garden, a wooden deck functionally ties the different parts of the building together during the warmer months.
The planning regulations dictate an extension formally quite different to the original architecture. The extension is narrower and only allows for one room in depth giving it a more closed façade towards the street and a more open façade towards the garden in the south. The load-bearing structure of the extension is mirrored in the façade, where relief in the wooden paneling creates a clear order and directs the placement of openings.
In conjunction with the construction of the extension, the original house will be renovated. Both will be painted in the same shade of light grey but will be given different window colors.