The Sperwershof estate got a new owner, who wanted to adapt the manor and the park to the current time. BiermanHenket, together with the owner, made a plan for a renovation in which sustainability was the guiding principle.
The Sperwershof country estate is part of the series of 's-Graveland country estates that arose at the beginning of the seventeenth century after the excavation and reclamation of the sandy soils west of Hilversum. In the 19th century the estate came into the hands of the Röell family. They build a new country house and had Hendrik Copijn design the gardens in English landscape style. In 1951, the Röell family had the manor house replaced by a new house as well as the coach house.
The current country house, which stands on the location of the original Sperwershof country house, and a large part of the park construction and the meadows belonging to the country estate, were purchased by a new owner in 2019. This new owner has commissioned Bierman Henket to renovate the current house and make it energy neutral. In addition, there are a number of assignments in the park, such as replacing and moving the swimming pool, building a new carport/storage room and constructing a new vegetable garden with a glass greenhouse.