Should we have runoff from the adjacent land?

Yes, you must receive runoff from land above your own.

This obligation applies only to rainwater that flows naturally along the slope of the land, i.e. without your neighbor having contributed to it.

So you don't have to put up with the spill of sewage or water from your neighbor's rooftops.

In case of dispute

If you can't speak to yourself, it is advisable to send the owner of the neighboring land a registered letter with acknowledgement of receipt:

• recounting the facts,
• and accompanied by arguments and evidence to support your statement (legal references, photos, etc.).

If you do not win the case with the mail, it is mandatory to try another step using:

• a justice conciliator (procedure is free)
• or mediation (paid)
• or participatory procedure (fee-for-service with legal counsel)

In the event of failure, you can then go to the court on which the land concerned depends.