Trollvagnen

The Trollvagnen development is located in a central part of Sollentuna on the former fairgrounds. A new urban block is established, connecting to the recently completed elderly care home to the west. Together, these buildings form a large courtyard with a north–south pedestrian passage running through the site. The newly built residential block features accentuated corners. A red-ochre rendered corner in the southwest, a yellow-ochre brick corner to the east, and a tall building in the northeast constructed of prefabricated, matrix-cast concrete, ground and finished in a light nougat tone.

All stairwells have façades with a plinth, main façade, and an accentuated eaves. The plinths vary in materials such as granite ceramic tiles, concrete, and brick. Façade materials range from render in varying textures to brick and ground, matrix-cast concrete.

Windows and balustrades are finished in a combination of silver-grey and brown. Entrance portals are clad in oak, while larger metal-framed glazed panels are used for the commercial units. Floor-to-ceiling heights vary throughout the block, creating diversity within the large block, which comprises a total of nine stairwells. Commercial premises are located at each corner. Parts of the roofs are equipped with solar panels. The former exhibition garage has been retained and expanded.

Great emphasis has been placed on integrated BIM design, with large amounts of metadata incorporated so that quantity take-offs and cost calculations can be generated in parallel with project progress. Within five months, the block was fully designed, the planning permission prepared and approved, and—through BIM design and careful material choices—a CO₂ analysis was completed with favourable results (216 kgCO2/m2). Construction began in early 2026.