At first glance I had thought you had built in a elevator. This isn’t as uncommon as you may think in houses. At second look though the stairs you have are bit tight. You may need to rework them a bit to get the rise/run so that it’s easier for people to use them. You may also want to put in a handrail for those on the stairs. Stairs really need to be user friendly (width excludes the space beside the handrail) as you can’t walk there so this space is added to the spec width of the stairs to make them accessable. Especially for a spiral staircase. The rise is reduced because of the rotation of the stairs (increasing the number of steps).
You could perhaps concider an elevator for the home. This would have the added benifit of making it wheelchair accessable increasing it’s marketablilty… This goes well with the minimalist design as those in a wheelchair don’t have a great need for added furniture and perhaps it would be a greater hinderance then help in a home… Many people could benefit from this though and it’s gotta be a big plus in a design. Concidering the depth of the design it would perhaps fit in nicely. Just a thought.
The exterior design is very striking. I like the minimalist idea. You do need to add some warmth to the home though perhaps hardwood floors or stuckode wall surface to give it a bit of texture.
Looks like a great design. I also love architecture. It’s been an interest of mine since highschool drafting days. Many moons ago…