Short answer
Use these guides to ask better questions, not to select a structural system remotely. Shortlist plausible systems, then confirm the property-specific design and installed scope with appropriate professionals and providers.
Compare the complete system
| System | Often shortlisted for | Watch closely |
|---|---|---|
| Concrete sleeper | Post-and-panel construction and defined finishes | Access, post excavation, handling and geometry |
| Cast-in-situ concrete | Custom reinforced geometry and continuous wall forms | Design, formwork, placement access, joints and curing |
| Timber | Lower-scale landscape walls and warm appearance | Product treatment, durability and future replacement |
| Block / Brick | Modular faces, curves and selected finishes | Named system, base, reinforcement and backfill |
| Stone and sandstone | Natural material and substantial visual character | Stone selection, skilled labour, access and method |
| Gabion | Permeable rock texture and robust landscape work | Footprint, mesh specification, fill and transitions |
| Rock and boulder | Large natural units and landscape integration | Machine access, footprint, placement and erosion |
Seven questions before choosing
- What retained height and loads must the wall address?
- How much footprint is available?
- Can machines and materials reach the work area?
- What geometry, steps, corners and boundaries apply?
- How will surface and subsoil water travel?
- What finish and maintenance expectation does the owner have?
- Which systems and skilled installers are genuinely available locally?
Price follows the specification
A useful comparison names the system, material or product, finish, design basis, drainage, access, excavation, spoil and professional scope. Without those fields, the quoted material label cannot support a like-for-like price decision.
What to record before seeking quotes
- Dimensions
Length, average retained height and how the dimensions were measured. - Earthworks
Excavation, spoil quantity, disposal, temporary support and site protection. - Drainage
Aggregate, geotextile, pipe, outlets and stormwater connections stated separately. - Professional scope
Engineering, geotechnical input, certification and approvals included or clearly excluded. - Commercial scope
GST, payment stages, variations, programme, warranty and exclusions.