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Building in a water protection area: separate water and building approvals
A project in a water protection area may require water-law review in addition to building approval. Check the protection order, project and conditions before work starts.
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31 August 2026 · Mag. Bernhard Brandauer, Rechtsanwalt
Building law and water law protect different interests. A project may still require review because of excavation, discharge, infiltration or groundwater.
Water protection areas add requirements for soil, drainage and installations.
Before filing and work starts, keep protection, water and construction in one coordinated file.
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Separate building and water approval
Separate building and water approval
The building authority applies building law. The water authority protects water and groundwater.
Infiltration, discharge, wells, drainage, excavation and works near water may require separate review.
Describe protection and intervention
Describe protection and intervention
First identify the applicable protection order. Site plan, parcel number and technical description define the scope.
Excavation, sealing, dewatering and drainage must be planned in a traceable way.
Compare conditions before work
Compare conditions before work
Water-law conditions may affect the schedule, maintenance and monitoring and belong in contract and programme.
Before work starts, building, water, protection and evidence documents should match.
Review points
Building in a water protection area: separate water and building approvals
| Question | Next step |
|---|---|
| Separate building and water approval The building authority applies building law. The water authority protects water and groundwater. | Infiltration, discharge, wells, drainage, excavation and works near water may require separate review. |
| Describe protection and intervention First identify the applicable protection order. Site plan, parcel number and technical description define the scope. | Excavation, sealing, dewatering and drainage must be planned in a traceable way. |
| Compare conditions before work Water-law conditions may affect the schedule, maintenance and monitoring and belong in contract and programme. | Before work starts, building, water, protection and evidence documents should match. |
Process
Three steps to a reliable file
- 01Step 101Step 1
Separate building and water approval
The building authority applies building law. The water authority protects water and groundwater.
- 02Step 202Step 2
Describe protection and intervention
First identify the applicable protection order. Site plan, parcel number and technical description define the scope.
- 03Step 303Step 3
Compare conditions before work
Water-law conditions may affect the schedule, maintenance and monitoring and belong in contract and programme.
Practical tip: A building decision does not automatically resolve water-law questions.
FAQ
Building in a water protection area: separate water and building approvals
Do I need water approval as well? +
It depends on the project, protection area and impact on water or groundwater. Plans and location are needed.
Which works are sensitive? +
Excavation, basements, dewatering, infiltration, discharge and installations affecting groundwater should be checked early.
Can work start after building approval? +
Only once further decisions and conditions are clear. Building approval does not replace water review.
Further reading
Further topics in construction law
Topics
construction lawconstruction projectland registeragreement
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