..the atrium...

I really like that atrium, so having been sceptical to whether it would get sufficient sunlight for plants to grow, I should add: There might be plants/trees that need less sunlight. But it also occurred to me that it might work even further North if you raised the floor of the atrium to the mezzanine level (just leaving columns and open space underneath). Or some variety of bringing the plants closer to sun? Or would that ruin the basic concept?

And looking at your last exterior rendering again, how about a roof terrace/garden around the atrium opening? I could see myself relaxing there after a swim in the pool, some good red wine waiting for the charcoal to work its magic on a leg of lamb...

ok