Signe – Mannerheimintie 14 

New office and retail building in the heart of Helsinki

Signe, at Mannerheimintie 14, is a premium Office and Commercial building in the heart of Helsinki, opposite the Stockmann Department Store. With new workplaces and a diverse range of shops, the Eight-storey building strengthens the vitality of the city centre and complements the distinguished streetscape of Mannerheimintie street.

Flagship retail spaces are located at street level and on the first basement level, while the second floor houses a high-quality restaurant opening onto vibrant Kalevankatu street. The upper floors offer spacious, adaptable offices for companies of different sizes, with the option of connecting adjacent floors by internal staircases. Arranged around a glass-roofed courtyard, the offices can be configured as open-plan, activity-based or cellular work environments. The rooftop terraces on the uppermost floors offer far-reaching views across central Helsinki.

The architecture is based on a modern interpretation of traditional Helsinki inner-city design. The main façade is divided into two sections, recalling the site’s original plot & building division and integrating Signe into Mannerheimintie’s long façade from different periods. Two types of German Jura limestone, clear colourless glass, dark patinated copper and carefully resolved rich detailing relate the new building to the scale and ornamentation of its neighbours. Granite façade panels salvaged from the former Aktia building have been reused on the rooftop terraces.

As with Sarc + Sigge´s projects generally, Signe’s office and commercial spaces have been designed for a high degree of adaptability. The building services, radiant ceiling panels and raised access floors enable spaces to be created and reconfigured for a wide range of uses. Generous floor-to-floor heights and a spacious column grid further enhance flexibility. This adaptability supports the building’s long-term usability and longevity in a changing world.

Alongside its adaptable design, Signe’s central location and excellent public transport connections contribute to the project’s low-carbon objectives. The building has been designed to meet the requirements of LEED Platinum and WELL certification.

Sarc + Sigge Architects was responsible for the project’s principal and architectural design. Developed by Sponda, the project was constructed by Jatke Toimitilat Oy as the main contractor. The building was completed in October 2026.