The City of Perth has a responsibility to ensure that all excavations and soil retention systems are professionally designed and certified.
This is to ensure that there is no danger to the public and any possible damage to adjoining properties can be identified and minimised.
There is a formal process for consultation with adjoining land owners under the Building Act for work affecting other land.
Refer to the Building Commission website for an explanation and consultation forms.
The City can advise on excavation and retention methodologies, including ground anchors and underpinning, along with the requirements under the Building Regulations to gain consent for “Work affecting other land.”