Art. 99 Introductory Act to the Swiss Civil Code (EGzZGB) - 2. Structural Modifications and Maintenance

1. Each of the two co-owners has the right to increase the height of the fire wall or to deepen it into the ground within the limits of the law and at their own expense. If the neighbor builds onto the newly constructed wall, they must pay the corresponding cost contribution in accordance with Article 98, Paragraph 3 of this law.

2. If a new construction or renovation requires it, the builder is entitled to demolish the existing fire wall and replace it with a new one. They must bear the costs alone and use any land on their property required for increased wall thickness. They must compensate the neighbor for any damage caused by the construction. If the wall was defective or did not comply with legal regulations, the neighbor must contribute proportionately to the costs.

3. No structural changes may be made to the fire wall from either side that would impair its function; in particular, no beams, cupboards, or other recesses may be embedded in the fire wall that extend further than 5 cm to the center line of the wall.

4. Furthermore, Article 698 is decisive for the maintenance obligation of communal fire walls.

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