In order to facilitate the increasing number of visitors, the museum has now been redeveloped and extended by architects Månsson og Dahlbäck, who were also responsible for the original museum. C.F. Møller has provided assistance in the development and execution of the project.

The redevelopment and extension will ensure improved accessibility for all, reduce queues and increase visitor capacity.

The new development is a separate extension of the existing, characteristic architecture of the museum with regard to shape and materials and stretches out into the adjoining park, Galärparken. The extension houses a new entrance and exit area, museum shop and a hall for temporary exhibits. The extension also allows for greater visitor capacity in the hall containing the Vasa ship.

A central aspect in the project has been to improve the climate control, taking into account the sensitive wooden ship and the increasing number of visitors. As such, the extension has ensured that the Vasa Museum will be able to continue to exhibit the historic ship in a safe manner for many years to come.