as soon as the Katasteramt and Grundbuchamt have got their act together
Getting a property deed is needed here too for applying a permit. Some designs can wait up to ten years because we started it before being sure the land property is in full order. Even for much bigger operations, some times there's a small lot who's owner died years ago, and state must be sure there is no heirs before the municipality can claim the lot...
We would also need to show some sunscreen system for that glasshouse (and not internal curtains), as our new regulations are trending toward sustainability (tough our thermal regulations are a bit weird anyhow)