Finland's Largest Mass-Timber Building by Anttinen Oiva Architects

Anttinen Oiva Architects has completed the Katajanokan Laituri in Helsinki, Finland, now the country’s largest mass-timber building. The project serves as the headquarters for Stora Enso, a prominent timber supplier, while also housing a 164-room hotel, restaurant, and publicly accessible green rooftop terrace.

Timber Construction Showcased in Sensitive Urban Setting

Located in Helsinki’s Kauppatori market district, Katajanokan Laituri spans 16,400 square metres over four storeys, including a basement with a parking area. Designed to demonstrate the versatility and sustainability of wood construction, the building uses around 7,600 cubic metres of timber, including cross-laminated timber (CLT) and laminated veneer lumber. According to the architects, this building “sets an example” for how timber can be integrated into sensitive urban environments, leveraging renewable resources while minimizing environmental impacts.

Double Skin Facade for Maritime Context

The building’s facade features a two-layer solution, with glass, natural stone, and white metal lamellas on the outside, covering the timber structure. This double skin protects the building from the challenges posed by its maritime location, while allowing its appearance to shift with changing light conditions. The design harmonizes with the surrounding historical stone buildings, creating a contemporary yet context-sensitive structure.

Biophilic Interiors and Sustainable Design

The building’s interiors continue the timber theme, with walls, floors, and minimalist furniture all made of wood. A central hall with a rounded, slatted ceiling serves as a focal point, crowned by a large skylight that floods the space with natural light. Beneath the skylight, a circular timber bench provides a communal meeting area. The hotel portion of the building is furnished with a minimalist timber design, offering a sustainable alternative to traditional luxury.

Commitment to Sustainability and Helsinki’s Carbon-Neutral Goals

Katajanokan Laituri contributes to Helsinki’s ambition to become carbon-neutral by 2035 as part of the city’s Carbon Neutral Helsinki Initiative. With timber construction at its core, the building reduces its carbon footprint while setting a new standard for sustainable development in the city.

A New Landmark in Helsinki’s Evolving South Harbour

The South Harbour district, where Katajanokan Laituri is located, is rapidly evolving. The area also hosts a timber pavilion by Verstas Architects and will be home to the upcoming New Museum of Architecture and Design, for which a design competition is underway. Katajanokan Laituri stands as a significant addition to this growing hub, blending contemporary architecture with Helsinki’s commitment to sustainability and innovation.