At my job, I was told to take a tiny apartment, that a tiny bit was added to, and turn it into two apartments. In the end they decided to keep it one apartment, but here are the results.
This is the original apartment, without the addition.
This is the apartment with the addition, split into 2 apartments, as I designed it at first.
This is an isometric projection of the two apartments
Later I looked at it again, and decided this would be a better way of dividing the apartment in 2.