A house is made up of two types of space: 
> functional space (kitchen, bed, ..)
> base-space (utilization space)
Without the base-space, you could not use the functional space.

However, the problem is that houses tend to use more base-space than is necessary.

In a space-saving house there is only one base-space, upon which all the functions operate.

Hence, such a house would be far smaller than standard accommodation. 

Each function (sleeping, cooking, eating, storing etc) would have its own volume without base-space.
The funcional-volumes hang outside the bigger base-space-volume.
Whenever a particular function is required, the user can pull them into the base-space, where they will operate according to the desired activity.

NB: The scale-model itself is space saving. You can fold it in and out

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2009 . STUDENT . ROYAL ACADEMY OF ART