Is a fence important to you (dog or similar)? Or is that another requirement from the Gaga community?
You only need to "declare" an area as a parking space. How you implement it is another question (especially since you exemplary don’t even have two cars). A relatively flat area in front of the house would already be enough. With grass pavers, it can be reasonably green. If you don’t use it at all, simply put container plants or rampant "edge" planting on it :cool: In practice, no one will care. And even if they do, you can prove the possibility of the second parking space (and if push comes to shove, you can also create it).
I would be pretty bold about it. Not because it is my nature, but because I truly find it crazy to act against sealed surfaces, gravel gardens, etc., and at the same time demand unnecessary reserve parking spaces for the German sacred cow. Especially since you even have two parking spaces in the original plan... the second just must not be "trapped".