The complex is to be composed of a welcome pavilion and two office buildings to be completed in two phases respectively; an 8-storey 180 metre (m) long block and a 24-storey tower, connected at the basement and second storey levels.

Upon completion, the Jean Monnet 2 building will enable the European Commission to consolidate the majority of its Luxembourg-based staff on one site.

[3] However, the building was constructed with an intended lifespan of just 25 years, and additionally, was planned to accommodate the staffing requirements of a European Communities of just 9 states and a Commission of more limited responsibilities.

[5] It said that the institution was making inefficient use of office space across the city, with the occupation of too many smaller office premises; it was spending too much money on the rental of properties; its staff was spread out too far from other supporting services such as crèches and schooling; and the current Jean Monnet building was ill-equipped to handle the hosting the Commission's IT and data services.

[9] In line with the criteria of the architectural competition, the final design of the Jean Monnet 2 complex sees it being completed in two phases, with the first phase accommodating staff displaced during the demolition of the original building, and the second stage accommodating staff relocating from Commission offices in Gasperich:[7][3] The main block and tower will be linked at the basement level and via an enclosed footbridge connecting their second storeys.

[3] A landscaped forecourt will be created at the ground level between the two buildings, with a separate "Welcome Pavilion", acting as a visitors centre, facing Boulevard Konrad Adenauer to be constructed in front of the tower and adjacent to the main block.

[3] This includes; Logistical services associated with running the building, including, amongst others, the postal sorting room and changing rooms for service staff will be mainly located on the first basement floor of the main block, whilst the basement levels of the tower will hold the office complexes' archiving facilities.

[3] The building will occupy a plot of land along Boulevard Konrad Adenauer, which forms its northern edge, and is bordered by rue Erasme to the east, and rue Antoine de Saint-Exupéry to the south, which will be extended to border the complex to west and meet with Boulevard Konrad Adenauer.

[3] Rue Albert Wehrer, which currently intersects the site, will be converted for pedestrian use only and made a part of the complexes' forecourt.

[2] A 2015 memorandum of understanding between the Luxembourg government and the European Commission aimed for October 2020 as the target date for the completion of phase 1 of the new building.

[10] Like the original complex, the new building will bear the name of EU founding father, and first President of the High Authority of the European Coal and Steel Community, Jean Monnet.