Chewton Glen Treehouses

Calcinotto has a long-standing relationship with the Chewton Glen Hotel & Spa and have carried out various services on the estate including portal frame agricultural structures, highway design and civil engineering works. In this project, we were commissioned to provide Civil & Structural Engineering services for the bespoke luxury treetop houses.

The proposed development was for twelve luxury suites in six lodges on stilts in the grounds of the Chewton Glen Hotel, optimising the spectacular views at the edge of the New Forest.

The lodges were designed to have as little visual and physical impact as possible reflecting the sensitive setting the green belt, close to the New Forest National Park and in an area of ecological value.

Due to the sensitive nature of the surrounding area driven piles were adopted with concealed above ground bracing. Ground beams were not permitted.

Bracing the columns was also not allowed as the visual impact of the structure was to be kept to a minimum. Stability was achieved by using a series of moment frames.
The superstructure needed to be hidden within the building fabric which was 120mm in width.

The lodges are kidney-shaped in the plan which meant 80% of the horizontal steelwork was curved.

The structural constraints and therefore complexities coupled with the planning, environmental, program and client expectations made this a very challenging yet enjoyable project to be involved in.


Chewton Glen Hotel & Spa




New Forest, Hampshire


Terence O'Rourke


Galliford Try