Concrete Sleeper Retaining Walls in Gosford and across the Central Coast

What concrete sleeper retaining wall work in Gosford and across the Central Coast actually involves

No retaining wall built for fill can sit within 1 m of a side or rear boundary unless it is within 1.5 m of an external wall of the house. Where a property is burdened by a stormwater, water or sewer easement, Council will generally not allow excavation or filling inside it.

Where this comes up most

Council's own plan for the former Warnervale East and Wadalba North West release area, now the suburbs of Woongarrah, Hamlyn Terrace and Wadalba, describes larger allotments created as elevation and slope increase. That kind of block is where a cut-and-fill concrete wall is common.

Over 600 mm

A concrete wall over 600 mm needs the same engineer certification as any other material, whether under the Housing Code or Council's development control plan. The main page sets out the licence line and the exempt list, and the Woongarrah page covers the release area.

Before the excavator arrives, ask whether the cut or the fill is the bigger number: Council's two caps are separate, and the boundary line for a wall built for fill is a third.

Concrete Sleeper Retaining Walls in Gosford and across the Central Coast — common questions

How deep can I excavate for a concrete sleeper wall?

Council's plan caps excavation at 1 m deep from existing ground level if less than 1 m from any boundary, or 3 m deep if more than 1 m from any boundary.

How high can the fill behind it be?

Fill for erecting a dwelling must not exceed 1 m above existing ground level, and no retaining wall for fill is to be within 1 m of a side or rear boundary unless it is within 1.5 m of an external wall of the dwelling.

What if an easement crosses the block?

Where a property is burdened by a stormwater, water or sewer easement, Council will generally not allow any excavation or filling inside that easement.