Do I need council approval for a retaining wall in Adelaide?

In South Australia, walls over 1 m typically require approval and engineering. Rules may also apply near boundaries, easements, steep slopes, or when combined wall+fence height exceeds 2.1 m.

What documents are needed for approval?

Two sets of engineering drawings, Certificate of Title, two site plans, certifier engagement, and any extra documents requested by your local council.

Are there boundary and setback rules?

Some councils require 600–900 mm setbacks unless neighbours agree. Over easements requires owner consent. Designs must prevent stormwater discharge onto adjoining properties.

Do under-1 m walls need approval?

Often not, but some councils use 600–800 mm thresholds or apply conditions based on soil, slope, proximity to structures, or services. Check with your council.

Can I Do My Own Council Approval for a Retaining Wall? – Square Gardens Adelaide

Joseph B.
Mar 6
2 min read

Updated: 5 days ago

When building a retaining wall in Adelaide—whether it’s a concrete sleeper wall, sandstone wall, or another style—you’re essentially creating a structure to hold back soil that would otherwise move or erode. That means there are safety, structural, and legal factors to consider.

The good news? Yes — you can apply for council approval yourself. But there’s a process, and you’ll need to be organised to get it right.

Why Council Approval Matters

A retaining wall that’s not built to code can:

Fail under pressure and collapse
Damage neighbouring property
Cause dangerous water runoff or soil erosion

That’s why South Australian councils have strict requirements before construction begins — especially for walls over 1 metre high or those near property boundaries, easements, or other structures.

What You’ll Need for a DIY Retaining Wall Approval

If you want to manage your own application, be ready to supply:

Two sets of engineering plansPrepared by a qualified engineer.
Certificate of TitleAvailable from the SA Lands Titles Office.
Two sets of builders’ site plansMust highlight wall height, location, and positioning.
A licensed building certifierThey’ll inspect during the build to ensure compliance.
Council application feeApproval typically takes around 10 weeks, depending on council workload.
Additional documents if requiredSome councils have extra conditions — always check before submitting.

Key Regulations to Keep in Mind

Rules vary by council, but in most cases:

Height limits — Over 1 metre usually requires approval; some councils set the limit at 600 mm or 800 mm.
Proximity to other structures — Approval may be required if your wall is within 1.5 m of another wall or building.
Easements — Walls must be at least 1 metre away from sewer pipes, water mains, and other easements.
Drainage rules — You can’t design a wall that directs water onto neighbouring properties.

When DIY Approval Makes Sense for Council Approval Retaining Wall Adelaide

If you’re building something small and low-impact — like a raised garden bed or a decorative retaining wall well away from boundaries — you might not need approval at all.

However, if your wall impacts safety, structural integrity, or neighbouring properties, Council Approval Retaining Wall Adelaide is essential.

Why Many Adelaide Homeowners Choose Square Gardens

At Square Gardens, we help homeowners:

Arrange engineering plans
Prepare and lodge council applications
Manage site inspections
Build retaining walls that are both beautiful and fully compliant

We handle the paperwork so you can focus on the end result — a safe, long-lasting retaining wall that adds value to your property.

📞 Call Square Gardens today on 0425 015 911 to get expert advice on your retaining wall design, council approval process, and construction options.