Norra Tornen, Twin residential towers in Vasastaden, Stockholm, Sweden

Norra Tornen is a pair of residential towers on either side of northern Torsgatan in Vasastaden, Stockholm. The eastern tower, Innovationen, has 35 floors and rises 120 meters; the western tower, Helix, has 30 floors and reaches 104 meters. Both are wide at the base and taper upward in stepped setbacks, their facades made of precast concrete elements with projecting box-like window frames.

Stockholm's 2010 plan for Norra station proposed two 140-metre towers, Tors torn, by Aleksander Wolodarski, but the land allocation was withdrawn in May 2011. In June 2013 Oscar Properties and OMA won the new process with Helix and Innovationen, renamed Norra tornen in November 2014. Construction of the eastern Innovationen tower began at the turn of 2016/2017, with residents moving in during autumn 2018; the western Helix tower followed, completed in 2020.

The towers stand on either side of northern Torsgatan, forming a link between Stockholm and the new Hagastaden district. Their name, adopted in November 2014, replaced the earlier working names Helix and Innovationen, taken from the two blocks they occupy. The ground floors hold shops and an event space.

The two towers stand on either side of northern Torsgatan, forming a link between Stockholm and Hagastaden. The eastern tower in the Innovationen block has 35 floors, the western Helix tower 30. The stepped setbacks mean the upper floors are reached by lifts; visitors should note the buildings are residential, with shops and an event space at street level.

The facade panels were cast by SCF Betongelement in Strömsund and delivered with windows already fitted, so each unit was lifted into place complete. Each panel also forms the balcony of the apartment above it, and the bathrooms arrived fully installed.