The master suite sits on the ground floor with its own walk-in robe and ensuite. A powder room sits nearby on purpose, so the household bathroom is never pressed into duty as the guest one.
Upstairs, two further bedrooms each keep their own built-in robe, sharing a family bathroom and separate WC far enough removed from the ground floor to feel like a wing of their own.
This didn’t need two ideas to work. It only needed one, followed all the way through.