Article 40 Planning and Building Act (PBG) - Danger Zone

1. The canton prepares hazard maps binding for authorities for settlement areas. The municipalities take the hazard map into account in land use planning and designate hazard zones where necessary.

2. Hazard zones include areas threatened by avalanches, landslides, rockfall, flooding, or other natural events. They are divided into zones of significant danger (red), moderate danger (blue), and minor danger (yellow) in accordance with the cantonal hazard maps.

3. In the hazard zone (red), no new buildings and facilities serving as habitation for humans and animals may be constructed. Existing buildings and facilities serving as habitation for humans and animals may only be maintained; the guarantee of existing rights applies only within this framework. Other buildings and facilities are only permissible if they are dependent on the location and can be largely protected from destruction through protective measures.

4. In the hazard zone (blue), buildings and facilities serving as habitation for humans and animals may only be constructed if the risk of damage is reduced to an acceptable level through appropriate site selection or suitable protective measures.

5. For construction projects in the hazard zone (yellow), builders should be informed about the hazard situation.

6. If cantonal hazard maps are lacking, this provision is to be applied analogously.

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