If you want to know if your property could be used as a building plot at all, you should take a look at the land use plan of the competent authority.
The land-use plan is the preparatory master plan (urban planning framework) of the competent authority. It contains the urban uses intended by the planning body and differentiated for the individual areas. For example, residential building areas, commercial building areas, supply areas, common use areas, traffic areas, green areas, forest areas and agricultural land.
The land use plan does not have a direct legal effect on citizens. No legal claims, in particular the right to a building permit for a particular plot of land, cannot be inferred from his drawing and textual representations. However, it constitutes a programme that is binding on the authorities and other authorities.
An indirect concern arises from the fact that development plans containing the legally binding determinations for all citizens must be developed from the representations of the land use plan.
In addition, citizens are inindirectly concerned when permitting projects in the "outdoor area" in accordance with Section 35 of the Building Code (BauGB), because representations of the land-use plan which are contrary to the construction projects are "affected by public concerns".
In order to ensure planning security, the land use plan should be valid for 10 to 15 years.