Flood defence works on a boundary in Portugal

Independent site: we are not a public authority, and this is not legal or tax advice.

An owner whose land holds flood-defence works must repair them, or allow neighbours at risk to do so, and everyone who benefits shares the cost in proportion to their interest (Código Civil, art. 1352.º).

Ask for a free check

Law

Código Civil (Decreto-Lei n.º 47344/66)

Article

1352.º

Duty

Make the necessary repairs, or allow the neighbours at risk to make them without harm to the owner (n.º 1)

New works

The same applies where a change in the watercourse makes new defence works necessary (n.º 1)

Obstructions

The same applies when material that has piled up or fallen blocks the water and puts others at risk (n.º 2)

Cost

Everyone who benefits contributes in proportion to their interest (n.º 3)

Liability

Whoever caused the damage stays responsible (n.º 3)

Official text

pgdlisboa.pt/leis/lei_mostra_articulado.php?nid=775&tabel...

Sources

pgdlisboa.pt/leis/lei_mostra_articulado.php?nid=775&tabel...

Checked

2026-11-05