A tree house by Østensjøvannet

Thibaut Devulder

The observation tower of the “tree house”, poking over the highest terrace of the garden

Some photos of the landscaping project we completed two years ago close to Østensjø, a natural reserve in Oslo.

The central piece of this project was a staircase that dovetailed the different exterior spaces around a private house, overlooking the lake from a steep rock face. Spiralling among the rocks covered with lush vegetation, this timber stair also doubles as an observation tower and secret hiding “tree house” for the children.