In 1884, he presented a master plan for a new neighbourhood and began to sell the land off in lots.

Josephsen paid for the construction of Mariendal Church out of his own pocket and gave a number of lots away for charitable housing projects or sold them at very favourable conditions.

In about 1900, it was acquired by a consortium and Mariendalsvej was extended as part of the plans for redevelopment of the area.

The central part of the Fuglebakken area was built over with single family detached homes and terraced houses over the next three decades while taller buildings were constructed along its edges.

The building for female municipal primary school teachers from 1900 was designed by Anton Haunstrup.

[4] The villa at Mariendalsvej 77 was designed by Hans Koch in collaboration with Carl Petersen for Harald Moltke in 1912.