Outdoor facility - Neighbor has already built a wall

talk to the neighbor, maybe he also wants it and you share the costs.

Look at the picture, the garage is certainly much much higher than allowed in RLP?
So the garage is as tall as their residential house next to it from the gable roof. And now there is supposed to be a carport attached in front

Oh, bushes will be planted there anyway as a privacy screen, so no plastering

well then you don't need to sow grass first that will have to be removed again.

Look at the picture, the garage is surely much, much higher than allowed in RLP?
So the garage is as high as their residential house next to it from the gable roof. And now they want to put a carport in front of it

You have to check that in the development plan

RLP: For border construction garage: ridge height max. 4 m, average wall height max. 3.20 m measured from the original ground level.