Anyone with any other advice?

Thanks room4acubby.
The overlay applies where if the drainage system's design capacity is exceeded, the property will be affected by Overland Flows.
My water documentation says that
"The estimated flood level for this…

Hello Everyone...
Just joined the forum having been a long term spectator.
Last year we moved into a big old house on a 750sq/m block with the intent of doing a pretty…