Use the building plot initially only as a garden

Isn't a motorhome enough as a temporary cottage for a few years? After all, Tiny Houses are not given away for free either?

A large older model caravan is available very cheaply. Something like a permanent camper.
An electricity connection would be helpful though.
A Tiny House, for example the Schwörerhaus FlyingSpaces, costs from about 100,000 € excluding additional building costs. It is not really worth it for a few years if you plan to dismantle it afterwards.

Hello and thank you very much for your answers!!

Indeed, we already have a caravan on the property. The question would be whether we can simply use it and, above all, if we are allowed to "enclose" it.

Our main concern is the "insertion requirement" mentioned by Escroda. Around it are partly massive houses (1-2 floors), but also garden bungalows from earlier times.

Would it make sense to say in a building application that we place a caravan/tiny house/garden house in the rear area and keep the area by the street open for a house of a normal type? This would just come later...

According to BORIS, the property is ready-to-build land. And of course in [Dame-Spreewald]

The question would be whether we can just use it

Where there is no plaintiff, there is no judge. As long as no one reports you or all the neighbors do the same, nothing will happen. It is not permanently permitted, as this is not a campsite.

and above all allowed to "enclose"

Ditto. However, enclosing is easier to sanction, as it is an obvious building violation.

Would it make sense to say in a building application that we place caravans/tiny houses/garden sheds in the rear area and keep the area on the street open for a house of a normal type?

No. A caravan is not subject to building law, a tiny house must fit in, and a garden shed would be an ancillary structure that is not approvable without a main structure.

This would just come a bit later...

You cannot legally circumvent building law. If you don’t want to build properly, the only question is which approach is the least conspicuous. For example, a construction site could have a construction trailer.

Regards
Peter Lustig

P.S.: BORIS does not provide reliable conclusions about planning law