Use template valid in non-buildable land area

Hello,
we have bought a semi-detached house in Baden-Württemberg.

The plot is divided into a non-buildable area and a buildable area.

The usage template prescribes: semi-detached development, gable roof.

We now want to build a double garage on the non-buildable area. This is permitted at this location. The question is only - does the obligation for a gable roof also apply to the garage - in other words, also to the non-buildable area? I would interpret this as meaning that these requirements only apply to the buildable area.

Thank you for your help

Ask your building authority - they will explain it to you right away. In development plans, the roof shape is often - but not always - specified separately for the garages. I would interpret it like you do, but a call should bring clarity.