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Retaining wall engineer in Melbourne
Your building surveyor or council asked for retaining wall engineering? We design Melbourne walls that are made to be built and sized so you don’t pay for structure you don’t need, with a fixed quote before you commit.
From $800+ GST
10 business daysfrom acceptance
Certificate 126for your building surveyor
300+ retaining wall projects completed in the last 12 months · Independent review by a second engineer · Every certificate signed off by our Director
Where to start
Building surveyor asked for engineering?
Send us what they sent you. In Victoria that’s usually engineered drawings and a Certificate 126 from a registered engineer, which your building surveyor uses to issue the permit.
Replacing an old wall?
A common misconception is that replacing an existing wall doesn’t need engineering or approval, but it does. A replacement wall needs the same design, certification and approval as a new one. We design it for today’s loads, drainage and fence, so it doesn’t fail again.
How it works
A fixed quote first, then certified drawings and your Certificate 126 in 10 business days from acceptance. Fast-track documentation is available.
1Send the details
Site address, rough wall height and length, and a few photos. Plans help, but aren’t essential for a first quote.
2Fixed quote
A team leader scopes the job and sends a fixed-price proposal. Any extra is quoted before work starts.
3Value-engineered design
Sized for your site, soil and loads and made to be built, with drainage designed in from the start.
4Reviewed and signed off
A second engineer reviews the design. Our Director signs off, and you get certified drawings and a structural design certificate.
What helps us quote fast
Have these handy and we can quote quickly.
- Site address
- Wall height and length (rough is fine)
- Wall type: sleeper, block, stone or concrete (or ask us)
- Anything on or near the wall: fence, driveway, pool, building or boundary
- A few photos of the site
- Soil report, if you have one
No plans yet? Rough measurements, a sketch and a few photos are enough for a first quote.
Melbourne approvals
In Victoria, a retaining wall generally needs a building permit and engineering if it’s over 1 m high or affects neighbouring land. Rules vary between councils, so check with your building surveyor or council.
Walls on or near a boundary often carry a fence. A fence on top adds wind load to the wall, so tell us about it and we’ll design for it.
A soil test isn’t always needed, but it limits the risk and can lead to a more efficient design. They typically cost $700–$1,500.
Where we work
Melbourne and across Victoria, with registered professional engineers. Recent Melbourne walls include Diamond Creek, Templestowe, Watsonia and Lalor. See also Melbourne pool engineers.
Recent Melbourne walls
Real Melbourne jobs from 2025–26.
Diamond Creek
41 m treated pine sleeper wall stepping from 200 mm to 1.4 m, with fence brackets for Colorbond and security fencing.
Templestowe
Natural stone retaining wall. The landscaper asked us to recommend the most suitable construction method.
Watsonia
A deck, retaining wall and engineered slab, designed as one package for a landscaper.
Landscapers and builders
Our engineers know site: simple, practical details your crew can build, sized so you don’t pay for structure you don’t need. Repeat customers get shorter turnaround times, and fast-track documentation is available.
Common questions
Do I need an engineer for my retaining wall in Melbourne?
Generally, if it’s over 1 m high or affects neighbouring land. Rules vary between councils, so check with your building surveyor. Send us a few photos and we’ll tell you what we’d need.
What is a Certificate 126?
It’s the Victorian certificate in which a registered engineer certifies the design. Your building surveyor uses it, with the engineered drawings, to issue the building permit.
How much does a retaining wall design cost?
From $800 + GST for a standard residential wall. Taller walls, or walls holding up a driveway, pool or building, are quoted on scope. Your fixed quote lists everything included.
How long does it take?
Usually within 10 business days of accepting our proposal. If anything is missing (for example a soil report or survey), we’ll tell you up front.
Do you build walls or do inspections in Melbourne?
No. Your builder or landscaper builds the wall from our drawings. Inspections, dilapidation reports and failure investigations are South East Queensland only.
Ready to get your wall approved?
Send us a few photos and the wall height. We’ll come back with a fixed quote.
Our Services
Contact Us
Camp Hill, QLD
info@ardentengineers.com.au
1300 509 927
ABN: 12649163897
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