Supo moves to Kaartinkaupunki

The Finnish Security and Intelligence Service (Supo) has relocated to new premises in the Kaartinkaupunki district of Helsinki. Fully customised for security and intelligence service operations, this is the most secure building in Finland.

Supo has begun operating from new headquarters in Kaartinkaupunki, Helsinki. The security solutions of this new building along Fabianinkatu are entirely unique in Finland. 

“For the first time in our history, we are now occupying premises that were specifically designed for the operating methods of a security and intelligence service. There is every reason to call this the most secure building in Finland," says Supo Director Juha Martelius.

The architecture and features of the building allow for the exceptional security challenges that are typical of Supo operations. Workspaces in the building seek to balance the sense of teamwork with exacting information security requirements. These flexible facilities are intended to serve the needs of Supo well into the future.

“Supo staff have been waiting for such state-of-the-art workspaces for decades, so we are eager to begin regular operations from the Kaartinkaupunki base,” Martelius explains.

The immediate neighbours of Supo in the block are the Ministry of Defence and Defence Command Finland, which previously occupied offices on the site of the new 140 metre-long Supo building. 

A timeless facade in a historic setting

The new building was designed by Anttinen Oiva Architects, whose Adagio proposal was selected in an idea competition arranged for the construction project. The light brick facade and classical architecture of the building integrate it beautifully into the historic cityscape of the Kaartinkaupunki district. 

The premises were designed in close partnership with Supo and the government real estate developer Senate Properties. The construction project was completed by SRV Construction Ltd on the alliance contracting model. The cornerstone was laid in September 2022, with the groundbreaking ceremony held just over a year later. Supo took formal delivery of the building in February 2025. 

Supo and its predecessor agencies previously operated for over a century from the traditional Ratakatu premises in the Punavuori district of the city until this building reached the end of its lifespan. The Service has operated from temporary premises in recent years. The new Kaartinkaupunki building has now provided a new home for Finnish civilian intelligence.

The new street location of Supo is Kaartinkuja 3

The entrance to the new building is in Kaartinkuja near the corner of Tähtitorninvuori Park. The new visiting address is Kaartinkuja 3, 00130 Helsinki. Kaartinkuja is currently closed to through traffic due to construction work, with access from Fabianinkatu only.

The other contact information of Supo remains unchanged:

• Postal address: PO Box 151, 00121 Helsinki, Finland
• Telephone number (switchboard): +358 295 480 131
• E-mail: [email protected]

Inquiries
Supo communications, tel. +358 50 402 6981, [email protected]