Concrete Sleeper
Concrete Block
Timber Sleeper
Brick
Palisade
Sandstone
Repairs & Replacement
What A Wall Costs
Rules, Approvals & Engineering
Quick Answer
A typical concrete sleeper or block retaining wall job for us runs $15,000 to $35,000. Where it lands inside that range comes down to how big the wall is and what finish it has.
- Every wall is estimated on its own after a site assessment, never off a square metre rate.
- Retained height is the biggest lever, and past 1.5 m it adds an engineer.
- Timber sleeper is usually the cheapest wall to build.
- Drainage and backfill are not optional.
The honest version first: nobody can price your retaining wall from a phone call, and anyone who does is quoting a wall they have not seen. What we can do is tell you what drives the number, which wall types sit where against each other, and roughly what changes between a cheap job and an expensive one.
That is genuinely useful, because most of the difference between two quotes for the same wall is not margin. It is what each builder has assumed about the footing, the drainage and the access.
What A Typical Job Actually Costs
A typical residential retaining wall job for us runs $15,000 to $35,000. That is a concrete sleeper or block wall on a normal suburban block, and where it lands inside that range comes down to how big the wall is and what finish it has.
Under that range you are usually looking at a low garden wall or a short run. Over it you are usually looking at a long wall, a tall engineered one, or a stone finish. Neither is unusual, they are just at the ends.
Why Two Quotes For The Same Wall Can Be Thousands Apart
We do not quote walls off a square metre or a linear metre rate, because every wall has different building needs. A 10 m run at 600 mm and the same run at 1.2 m are different jobs: the taller wall needs bigger posts, a deeper footing and more drainage, and it is more than twice the work.
The second difference is what is included. A quote that excludes excavation, disposal of the spoil, the aggregate and the agricultural drain will always look cheaper than one that includes them, right up until the invoice.
The Nine Things That Move The Number
- Wall height, length and layout. Height is the biggest lever, and past 1.5 m it adds an engineer
- Whether the wall is cut into the slope or holds back built-up soil, called fill
- The existing ground and site levels: rock changes the digging, clay changes the drainage
- Machine access and any site restrictions, because a machine at the wall line changes the labour completely
- Excavation and taking away the soil dug out, called spoil
- The footing and foundation the wall needs for its height and the ground
- Drainage and backfill, which are not optional and are the reason most failed walls failed
- Structural loading and engineering, where a driveway, pool or building sits behind the wall
- The materials and finish you choose, which is the part you actually get to decide
Want A Real Number For Your Wall?
We measure the fall, check the access and tell you what your site will take.
Book A Site AssessmentWhich Wall Type Is Cheapest
Broadly, timber sleeper is usually the cheapest to build and palisade and stone clad block are the dearest, with concrete sleeper sitting low and concrete block in the middle. Sandstone is the one that refuses to sit anywhere on that list, because its price is set by whether a machine can reach it rather than by the stone.
That order is a guide only. We do not publish rates, because every wall is estimated on its own after a site assessment.
What A Cheap Quote Usually Left Out
- No agricultural drain, or a drain with no aggregate and no sock around it
- A footing sized by eye rather than by the retained height
- Post spacing widened to save on posts
- Excavation and spoil removal priced as an extra once work starts
- No allowance for the engineering a wall over 1.5 m has to have
How To Compare Two Quotes Properly
Ask both builders for the retained height they have priced, the post spacing, the footing depth and whether drainage and spoil removal are in the number. If one of them cannot answer those four questions the quote is a guess.
Then ask what happens if rock turns up. A builder who has thought about it will have an answer, and the answer will be in the quote rather than in a conversation later.
Getting A Real Number
We come out, measure the fall, check what a machine can reach and look at the ground. You get one number with the drainage and the footing already in it, and a plain explanation of which wall types your site will and will not take.
If you want a rough steer before that, send a photo of the slope with a rough length and height. That is usually enough to rule options in or out.
Retaining Wall Cost Questions
How much does a retaining wall cost in Canberra?
A typical residential retaining wall job for us runs $15,000 to $35,000. That is a concrete sleeper or block wall on a normal suburban block.
Are retaining walls priced per metre?
No. We do not price walls by the square metre or by the metre of length, because every wall is built differently. Each one is estimated after a site assessment, from the height, the ground, the access, the footing, the drainage and the finish.
Which retaining wall is the cheapest?
Timber sleeper is usually the cheapest to build. Concrete sleeper sits low, concrete block sits in the middle, and palisade and stone clad block are the dearest.
Does a taller wall cost more?
Yes. A taller wall needs bigger posts, a deeper footing and more drainage, and past 1.5 m of retained height it adds an engineer.
Can you price my wall over the phone?
Not properly. A real number only comes from the site. Send a photo of the slope with a rough length and height, and we can usually rule options in or out.
Written By
The Elite Team
The same person quotes your wall, works with the engineer when one is needed and builds it.
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