Key legal question
Whether a parcel is sufficiently served by water supply for a building permit under Art. 4 BauG.
Extracted holding
A building permit may be granted only if the parcel has sufficient water supply, meaning enough good water for drinking and domestic use plus adequate fire protection.
Extracted reasoning
The court stressed that both quantity and quality of water are required, including fire-fighting protection. This is necessary to protect public health, and strict standards are justified, especially for restaurant use and tourism.