Going through plan checks and getting the current requirements back in a correction, one of the projects had their insurance ask what code LA County is using to require drainage plans on some lots, and not on others. The answer is located at https://recovery.lacounty.gov/rebuilding/#1748045501767-b458c642-b9a3
What are the requirements for cross-lot drainage?
There are two options regarding cross-lot drainage:
- Any impact to an adjacent property would either need to be mitigated onsite or an offsite drainage acceptance covenant would need to be signed by the adjacent property owner and recorded.
- If the pre and post construction’s onsite drainage net effect at the property line is deemed by the architect or engineer of record to be negligible, the findings would be reviewed and if accepted, the architect or engineer would need to place a statement on the plans declaring their findings for permanent record.