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Inner city development optima forma

Challenges with the square meter

The start of construction of the Adagio and Bolero residential towers in The Hague started in the spring of 2020. The towers make up a part of the Sonate project at the Spuikwartier, in the heart of The Hague right at the spot where the Ministries of Justice and Home Affairs were previously located.

The towers are built on top of an existing parking garage and their foundations will be constructed through this garage. "We were only able to reach the ground level after a year into the construction," says Koert Damstra, director of Delta and responsible for the project, Sonate: "It is an inner city development optima forma." Due to there being other challenges with the project, the towers are being built on two sides right next to the OCC, the new art and culture center which is also being constructed at this time by contracting partnership Cadanz. Close cooperation between two construction companies on a very small building site is therefore imperative, especially as all this is happening in the heart of one of the busiest cities in the Netherlands. Due to their prominent location, Delta has chosen a high-quality finish for the towers. The quality continues into the interior, both in foot traffic areas and within the appartments.

The entire project will eventually consist of three towers, the latter of which will be developed at a later stage on the site where currently the Nederlands Dans Theater resides. The Dans Theater will eventually move to the OCC to make way to develop the last tower "Cantate".


Completion of Bolero is planned at the end of 2021, after which tower Adagio will be completed some six months later later.

Sonate Appartments The Hague


End of 2021(Bolero)

Begin of 2022 (Adagio)


Adagio: MVSA Architects

Bolero: Klunder Architecten


Boele & Van Eesteren



268 apartments (2, 3 and 4 rooms)

1.215 m2 LFA  commercial

in 2 units


188 apartments (2, 3 and 4 rooms)

285 m2 LFA commercial

in 2 units


Spuikwartier, Den Haag


Reggeborgh, VolkerWessels


  • Delta Development Group _ Sonate_Den Haag
  • Delta Development Group_Sonate_Den Haag