Follow me on a guided tour...
The first floor is dominated by bedrooms, including a couple of guest rooms forming a small suite.
Bathrooms are clustered around the central core. I envisage solar light tubes leading down from the roof to bring some natural light into those windowless spaces.
Ali asked me why I didn't give the kids' rooms separate en-suites. I could have, but with such a deep space to play with it would have made access a problem, and I like the idea of the hallway linking all the family rooms together. All the bedrooms have sliders opening out to a paved area running around that side of the house.
The big open space is a spacious garage with lots of room for bikes, storage, and a large work area for all those tree forts and pirate ships I need to build. This means we might have a fighting chance of getting actual cars in the garage!
The main entrance leads into a circular hall with stairs up either side to a balcony.
The second floor is extremely simple, and shows the spiral nature of the plan with a sweep of rooms running around the house.
I've added another staircase joining the playroom below with the family room above. I think this makes these informal family living spaces more self-contained and slightly separated from the entertainment areas.
This stairwell continues up to the eyrie at the top - strictly adults only :)