Over the next 50 years, Birkeborg served as a country house and summer residence for several wealthy Copenhagen families until it was demolished in the 1960s.

The grounds of the Birkeborg estate totalled about 3 barrels of land (Danish: tønder), equal to over 16,000 square metres.

The building featured four storeys, a roof superstructure with a tower clock and a columned colonnade facing the beach, dominating the more modest villas on Strandvejen.

Shortly afterwards, in 1961, the Danish Ministry of Culture acquired the Birkeborg property from Hansen, after which the demolition of the mansion began and was completed in 1966.

The villa was situated on a slope facing the beach, offering excellent views of the Øresund strait and the Swedish coast.