Supply and Install vs Supply Only: Retaining Walls in Perth Explained

If you're comparing quotes for a retaining wall, you've probably seen the term "supply and install" thrown around. Here's what it means: the same company delivers your materials and builds the wall — no juggling a separate supplier and a separate tradesman. At Retain Walls WA, we handle both ends, so there's no gap between delivery and construction, and no confusion about who's responsible if something needs adjusting on site.

Steel Posts vs Concrete Posts — What's the Difference?

This is one of the most common questions we get, so here's the honest breakdown.

Galvanised Steel Posts

• Lighter than concrete, making installation faster and easier on tricky sites

• Hot-dip galvanised for strong rust and corrosion resistance

• Won't crack, chip, or shatter under pressure the way concrete can

• Long design life with minimal ongoing maintenance

Concrete Posts

• Very strong under heavy loads, suiting large commercial or industrial jobs

• Heavier and more prone to chipping or cracking during transport and installation

• Can be cost-effective upfront on very large-scale projects

For most residential Perth properties — especially with our reactive clay soils and sandy conditions — we recommend steel posts. They handle ground movement well, install cleanly on tighter suburban blocks, and hold up over the long term without the maintenance headaches.

One Company, Start to Finish

Got an old, tired, or failing retaining wall — maybe with an old fence to match? We manage the whole project as one coordinated job, scheduled back-to-back so there's no downtime waiting between trades. A typical full job might look like: demo and removal of the old retaining wall, asbestos removal if needed (arranged through our licensed subcontractor, with WorkSafe WA notification and approval handled as part of the process), installation of your new steel post and panel retaining wall, removal of the old fence, and a new Colorbond fence installed directly by our team — all managed as a single scheduled project, not handed off between separate unconnected contractors.

Shire Approval & Engineering Assistance

Some retaining wall jobs require shire (local council) approval and engineering drawings before work can start — typically for taller walls or walls close to a boundary. We can assist with the shire application and approval process, including arranging engineering drawings where required, so you don't have to navigate the paperwork on your own.

Areas We Cover

We supply and install post and panel retaining walls right across Perth metro, including:

Northern Suburbs

Joondalup, Currambine, Edgewater, Kinross, Ocean Reef, Heathridge, Craigie, Padbury, Whitfords, Hillarys, Duncraig, Wanneroo, Clarkson, Butler, Alkimos, Yanchep

Western Suburbs

Scarborough, Karrinyup, Trigg, Floreat, City Beach, Wembley, Subiaco, Claremont, Cottesloe, Nedlands, Fremantle, East Fremantle, White Gum Valley, Hilton, South Fremantle

Southern Suburbs

Melville, Booragoon, Applecross, Bicton, Palmyra, Kardinya, Willagee, Bull Creek, Leeming, Cockburn, Rockingham, Baldivis, Canning Vale, Thornlie

Eastern Suburbs

Midland, Guildford, Kalamunda, Forrestfield, High Wycombe, Belmont, Bassendean, Mundaring, Gosnells, Armadale

Not seeing your suburb listed? We service greater Perth metro — get in touch to confirm.

FAQ

How much does a retaining wall cost in Perth?

Pricing depends on wall height, length, site access, and ground conditions. Get in touch for a free, obligation-free quote.

How long does installation take?

Most residential jobs take anywhere from one day to a week, depending on the depth and complexity of the job.

Do I need council approval for a retaining wall?

Approval is often required for walls over 500mm high or close to a boundary. If your job needs shire approval and engineering drawings, we can assist with the application process from start to finish — just ask us when you get your quote.

Can you handle fencing and asbestos removal too?

Yes. We install Colorbond fencing directly, and if your job involves asbestos, we arrange a licensed subcontractor to handle the removal, including the required WorkSafe WA notification and approval process, scheduled as part of your overall project timeline.

Ready to get started? Contact us today for a free quote.