Retaining Wall Engineer

Certified structural engineering for retaining walls across Australia. AS 4678 compliant designs. Fast turnaround, council-approved documentation.

✓ From $600+GST ✓ AS 4678 Certified ✓ 7-Day Turnaround ✓ All States & Territories
Get a Quote Call Chris: 0435 954 928

Do You Need a Retaining Wall Engineer?

In Australia, you legally require a certified structural engineer for retaining walls in these situations: walls over 0.60 metres in height, walls built on a property boundary, walls supporting additional loads like driveways, pools or buildings, on sloped or unstable terrain, or in reactive clay soils common in Melbourne, Sydney and Brisbane.

Without proper engineering certification, your council will not approve your building permit. An improperly designed wall risks soil collapse and damage to your property or your neighbour's — leaving you legally and financially liable.

Don't risk it. Wall failures cost $10,000–$50,000+ to repair. Our $600+GST engineering investment protects you from far greater expense.

Wall Types We Engineer

Concrete Sleeper Walls

The most popular choice. Cost-effective for retained heights up to 2.40 metres. We design both post-and-sleeper systems with optimized footing depths.

Timber Retaining Walls

Treated pine or hardwood sleeper walls. Economical for lower walls under 1.8m. We specify correct post spacing, embedment depth and drainage.

Concrete Block Walls

Besser blocks, masonry blocks or interlocking systems. Engineered for maximum strength on challenging sites with high loads or poor soil.

Gabion & Stone Walls

Steel mesh cages filled with rock. Flexible, permeable and visually striking. We design for proper cage sizing, fill material and base stability.

View All Wall Types

How We Work

We're a 100% online engineering service. No site visits needed — everything is handled by email. This keeps turnaround fast, fees low, and means we can service any location in Australia.

📄 What to Send Us

Email any of the following to office@retwall.com.au, or use our online contact form to attach files directly:

✓ Site plan or survey showing the wall location

✓ Soil / geotechnical report (if you have one)

✓ Photos of the site and existing conditions

✓ Sketches showing wall height and length

✓ Builder or landscaper quotes/plans

Don't have plans? A photo and rough dimensions is enough to quote.

💰 Payment Terms

50% deposit to commence work.
Payable on acceptance of quote.

50% balance on delivery.
Due when final documents are issued.

Payment methods: bank transfer or credit card.

Send Your Docs

Email plans, photos, or sketches to office@retwall.com.au, or upload via our contact form.

We Quote

We confirm scope, fee, and timeframe. Usually same-day reply.

50% Deposit

Pay deposit to commence. We start immediately.

We Design

AS 4678 compliant design. 7 business days typical.

You Review

Drawings issued for review. Amendments at no extra cost.

Final Delivery

Calculations, drawings, certification. Balance due. Council-ready.

After delivery, if council requests additional engineering information, we handle it at no extra cost.

Engineering Fees

Wall HeightTypical Fee
Under 1.2m$600+GST
1.2m – 1.6m$800+GST
1.6m – 2.0m$1,000+GST
Over 2.0mCustom quote

Engineering fees only. Construction costs are separate. View detailed pricing →

Australia-Wide Service

Based in Melbourne, we provide retaining wall engineering services across every Australian state and territory. Select your state to find local expertise:

Victoria

Melbourne, Geelong, Ballarat, Bendigo, Shepparton & regional VIC

New South Wales

Sydney, Newcastle, Wollongong, Central Coast, Maitland & regional NSW

Queensland

Brisbane, Gold Coast, Sunshine Coast, Townsville, Cairns & regional QLD

South Australia

Adelaide, Whyalla, Murray Bridge, Port Lincoln, Mount Gambier & regional SA

Tasmania

Hobart, Launceston, Devonport, Burnie, Kingston & regional TAS

Frequently Asked Questions

When is engineering required for a retaining wall?
In most Australian states, a building permit and engineering are legally required for retaining walls over 0.60 metres in height or walls built on a property boundary. Walls supporting additional loads like driveways, pools or buildings also require engineering.
How much does retaining wall engineering cost?
Our engineering fees start from $600+GST for walls under 1.2m, $800+GST for 1.2–1.6m, and $1,000+GST for 1.6–2.0m. Walls over 2.0m require a custom quote and geotechnical report.
Do I need a soil test before engaging an engineer?
For walls over 1.8–2.4 metres or on known problematic soils, a geotechnical report is recommended. For smaller walls, we can design using conservative soil assumptions from AS 2870 classifications.
How long does the engineering process take?
Average turnaround is 7 business days from deposit. Simple projects can be faster (3–5 days), while complex sites may take 10–14 days.
Can you help with council permits?
We provide all engineering documentation required for your council building permit: signed calculations, construction drawings, and engineer's certification. We don't lodge applications directly.
What if my wall is on a boundary?
Boundary walls require special care. Our engineering addresses protection of neighbouring structures, drainage that doesn't discharge onto adjacent land, and adequate footing design to prevent movement.
Do you service my area?
Yes. We provide retaining wall engineering across all states and territories. Our designs comply with AS 4678 and your specific council's requirements. We work remotely for projects nationwide.

Ready to Get Your Wall Engineered?

Call Chris for a fast quote — most quotes returned within 24 hours.

Get a Quote Chris: 0435 954 928