Key legal question
Whether the federal appeal against the cantonal decision confirming the preliminary building sanction was admissible.
Extracted holding
The challenged decision was incidental, and the appellant failed to show an irreparable prejudice or other exceptional grounds for immediate federal review.
Extracted reasoning
A preliminary sanction is only a step toward the definitive permit; objections can be raised again against the final building permit. The disputed questions were not of principle and did not require immediate review.