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Frequently Asked Question

How Deep Should a Service Trench Be in Sydney?

Depth depends on the service, surface, authority requirements, cover and the project specification.

There is no single trench depth for every electrical, NBN, water, gas or drainage job. The relevant trade and network or authority requirements determine cover, bedding, separation and protection. Drainage also needs a designed grade.

Provide the excavation contractor with the approved service specification rather than relying on a generic depth. Confirm the finished surface level before setting out the trench.

Need Advice for Your Sydney Site?

Send the suburb, route photos, approximate length and the service being installed. We can assess underboring, trenching, access and excavation requirements.