Ah okay – my property is in the WA-4 area, which is the rear, more open development zone. (So "o") The front (WA-3) is more densely built with a floor space index (FSI) of 0.8, while only 0.4 FSI is allowed for me (single-family houses, max. 1 full floor).
Therefore, I think the designation "backyard development behind the first row" fits quite well.
We went around in circles because we already had a preconceived idea for the architect about how we preferred it and considered it more sensible where the garage should go. Likewise, we had drawn floor plans and ideas beforehand. But our opinions kept changing, so we naturally wanted to leave it to the architect, who has obviously much more experience and knowledge, to design it as he sees fit. We definitely needed a draft to at least have something tangible to build upon. Our ideas at least led to "nowhere" :D