The stream on the property looks attractive. You are planning a changed garden use, different planting or additional storage areas near the water. Before you assess the entire visible area as freely designable part of the purchase offer, the watercourse margin there must be clarified legally.
Consider protection function and local regulation together
§38 WHG deals with watercourse margin strips with ecological and water-management functions. The provision describes spatial reference points, a federal framework and possible deviating regulations of the Länder or official determinations. It also contains certain prohibitions and possibilities for exemptions. [RAND]
A single nationwide distance figure is therefore not a sufficient property check. Have clarified which provisions apply to the specific watercourse section and how the affected area is determined on site. The article therefore does not establish a boundary nor a specific permissible garden use.
Divide your project into measures
Our editorial recommendation: Describe separately whether you want to alter shrubs and trees, store items, reshape soil or construct an installation. “Prepare garden” is too vague. The responsible specialist authorities should explain which water, nature or building law assessment is necessary.
Also record the current condition. The existence of a storage area or past use does not constitute a confirmed permission by you to repeat or expand it. A clear documentation helps to ask the right question; it does not replace the professional assessment.
Fictive case: The preferred storage place lies in the unclear margin area
A buyer wishes to regularly store garden materials on a level area near the stream. The sales page has items standing there from time to time and therefore regards the plan as unproblematic. Which margin area and which usage requirements apply has not yet been clarified.
The buyer has his concrete measure examined and investigates another possible use on the property. The example therefore neither states a storage ban for the specific area nor grants an exemption. It shows why the current appearance does not replace the necessary proof of regulation.
Area and personal benefit are different figures
A property can be spatially large and still contain certain areas that cannot carry your desired project without further clarification. Do not unilaterally exclude such areas from the property. For the purchase decision it should, however, be visible what benefit you can actually assume as clarified.
Discuss essential open usage questions with contractual advice and specialist authorities before you become bound. A personal price reduction does not make a required assessment unnecessary. Likewise, the deed of sale alone does not promise professional admissibility of every change you desire.
Treat other water issues separately
Watercourse margin strips do not answer all flood, water abstraction, maintenance or boundary questions. If any of these concerns your purchase motive, it requires an appropriate additional assessment. A clarified margin use is not a comprehensive water-law clearance.
Your result links the specifically applicable margin area with the individually described measures. This allows you to compare the offer with your actual intended use and clarify crucial uncertainties before you base the purchase on an allegedly fully freely designable bank area.