IF you're looking for something unusual on which to spend your nest egg, here's some cheep housing.

Californian builder Jayson Fann has gone into business creating human-sized nests made from locally harvested wood, which he cuts and spirals together to create these incredible functional art sculptures.

The constructions range from indoor love seats to thirty-person look-outs.

Each construction needs the help of two or three assistants, depending on the size of the project.

The lengthy process begins with stripping branches to ensure no damage is done to the living tree before removing the leaves and twigs.

The nests are mostly made of eucalyptus for its strength, and each sculpture needs two and a half trailers of wood.

The wood is puzzled together to create a spiraling pattern designed for structural integrity and the flowing aesthetic.

By bending the wood and using counter-sunk screws the structure is expected to remain strong and intact for many years.

Finally, a strong base is needed, on which to rest the finished nest. Moving the nests can be the hard part. It requires a crane.

And what's the point of having a human-sized nest if you can't get in. Once the nest is finished, Fann installs an interior matt and ladder for access.

The custom-made nests can cost anywhere between $4000 to $20,000.