Sites that can accommodate the footprint and construction access, where a rock-filled basket system, permeability and robust textured finish align with the design objective.
What gabion retaining walls cost
Planning band: A$500 to A$850 per m² of wall face. A 10 m wall retaining 1.0 m with good access lands around A$5,800 to A$11,500 installed before removal or professional work.
Bands are the calculator's national planning coefficients, version rwq-au-2026-09-01-preliminary, GST inclusive, before any site inspection. They are not quotes and not a structural sizing rule.
Where this system may be a poor fit
Narrow sites, poorly detailed transitions, unsuitable fill, or proposals that call the system free draining without addressing foundations, filters, surface water and final discharge.
What moves the installed cost
- Basket dimensions, mesh, wire coating, lacing and internal bracing.
- Rock type, grading, hand-facing requirement and freight.
- Foundation preparation, footprint, access and assembly labour.
- Filter separation, drainage transitions and wall ends.
What the quote should specify
- Basket manufacturer or mesh specification and coating.
- Cell sizes, diaphragms, lacing, bracing and rock grading.
- Visible-face placement standard and acceptable deformation.
- Foundation, filter, drainage, transitions and inspection access.
Maintenance and future work
Inspect wire coating, corrosion, broken mesh, lacing, rock loss, deformation, vegetation and erosion at the base or ends. Record the basket specification because repairs depend on compatible components.
Quote checklist for gabion retaining walls
- System
Basket manufacturer or mesh specification and coating. - Design
Cell sizes, diaphragms, lacing, bracing and rock grading. - Site work
Visible-face placement standard and acceptable deformation. - Handover
Foundation, filter, drainage, transitions and inspection access.
Use this guide to compare options, then confirm the final system, dimensions and component details for the property with the relevant designer and provider.
Common questions
Are gabion retaining walls the cheapest option?
On the wall-system line the planning band is A$500 to A$850 per m² of wall face, against timber at A$300 to A$520 and natural stone at A$650 to A$1,100. There is no dependable national ranking of installed cost. Design, access, excavation, drainage, labour, freight, professional work and maintenance can change the complete figure.
Can gabion retaining walls be quoted per metre?
Use wall-face area and a complete installed scope. A lineal rate without height, access, drainage, excavation and professional assumptions is not comparable.