Retaining Wall Builders Launceston

How We Work

Measured and Quoted on Site

Not off a photo. We come out, look at the ground and the access, and price the actual job.

The Ground Gets Done Before the Concrete Does

Excavation, a compacted base and reinforcement to spec, the half that decides how long it lasts.

One Price, and We Take the Mess with Us

One written price for the whole job, not a rate per square metre, and the site is left clean.

Read This First

Height Decides Whether You Need an Engineer

This is the thing every product page leaves out and every homeowner needs. Past a certain height a retaining wall stops being landscaping and becomes a structure, with engineering and usually council approval attached.

Two low terraced concrete sleeper walls stepping down a sloping garden — Two walls under a metre, terraced, instead of one tall one. Often cheaper and simpler than the single wall people first ask for.

Under About a Metre

Usually straightforward, and usually no permit, but it still needs proper footings and proper drainage, because that is what makes a wall last rather than what makes it legal.

Over About a Metre

Almost always needs engineering, and in most council areas a permit as well. The wall has to be designed rather than assembled, and that design costs money before anyone digs.

Anywhere Near a Boundary

Setbacks, your neighbour's ground and shared responsibility all come into it. Worth sorting before a wall goes in, not after.

If There Is a Surcharge Above It

A driveway, a shed, a pool or a parked car above a wall changes the load fundamentally. That is engineering territory regardless of height.

Two Low Walls Instead of One Tall One

Terracing is very often cheaper, easier to approve and better looking than a single high wall. We will suggest it where it works.

The Actual Job

The Wall Is the Cheap Half. Drainage Is the Rest.

Dry soil is heavy. Saturated soil is far heavier and it pushes sideways with real force. A wall built without drainage is holding a load it was never designed for, every time it rains.

Agricultural drainage pipe, aggregate and geofabric being built in behind a retaining wall — Ag line at the base, clean aggregate against the wall, geofabric keeping the soil out of it. This is the part nobody photographs and everybody pays for.

An Ag Line Along the Base

Slotted pipe wrapped in sock, laid to fall, taking water to somewhere it can actually go. A pipe that discharges nowhere is decoration.

Clean Aggregate Against the Back

Free-draining stone up the back of the wall so water reaches the pipe instead of soaking into the soil and sitting there.

Geofabric Between Stone and Soil

Without it the soil migrates into the aggregate over a few years and the drainage silts up. The wall then fails slowly, for a reason nobody can see.

Weep Holes Through the Face

On block and poured walls, holes through the wall so water has a second way out. They look like a detail and they are a safety valve.

And Somewhere for It to Discharge

Into a stormwater pit, a soakwell or daylight at the low end. This is the question we ask that most quotes never mention.

Drainage is the half a cheap quote leaves out. Ours says what goes behind the wall, in writing.

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The Three Types

Concrete Sleeper Retaining Walls, Block and Poured

Most residential walls are one of these three. They cost differently, look different and suit different jobs.

Concrete sleeper retaining walls, a concrete retaining wall in Launceston — Concrete Sleeper Retaining Walls
A concrete sleeper retaining wall is horizontal sleepers dropped between galvanised steel posts concreted into footings. The most common residential wall by a distance, and the fastest to build.

Core-filled block, a concrete retaining wall in Launceston — Core-filled Block
Concrete blocks laid on a footing, reinforced vertically and filled with concrete. Solid, renderable, and the usual answer where a wall needs to look built rather than assembled.

Poured reinforced concrete, a concrete retaining wall in Launceston — Poured Reinforced Concrete
Formed and poured in place with steel through it. The strongest and the dearest, and the one that gives an off-form finish.

Terraced walls, a concrete retaining wall in Launceston — Terraced Walls
Two or more lower walls instead of one tall one. Usually cheaper, usually easier to approve, and it gives you planting beds.

Posts and footings, a concrete retaining wall in Launceston — Posts and Footings
Galvanised H-posts concreted into individual footings, braced until they set. The footing depth comes off the wall height.

Weep holes and the base, a concrete retaining wall in Launceston — Weep Holes and the Base
Where the water comes out. A pebble strip at the foot stops the discharge washing the lawn away.

Choosing Between Them

What Each Type Costs You and Gives You

Read across. There is no best wall, only a best wall for the height, the look and the budget.

TypeRoughlyLooks likeBest for

Concrete sleeperThe most affordableHorizontal banded, industrial-neatMost residential walls, garden terracing, fast builds

Core-filled blockMiddleSolid, and it can be rendered or cappedWalls you look at every day, or that carry a fence above

Poured concreteThe dearestSmooth off-form with tie holesHeight, surcharge loads, and a deliberately architectural finish

Timber sleeperCheapest todayWarm, and it greys offNothing we would recommend where it holds real load

The last row is there on purpose. Timber is the cheapest wall on the day and the one we are most often called out to replace, because it rots from the back where you cannot see it. Every failed wall photograph on this page is a timber one.

Why They Fail

The Five Reasons Walls Lean, Bulge and Fall

We get asked to look at leaning walls regularly. It is almost never a wall that was not strong enough. It is one of these five.

An old timber sleeper retaining wall leaning outward and bulging, with water staining — Rotated forward, bulging in the middle, water stain down the face. This wall was not under-built. It was undrained.

No Drainage Behind It

The single biggest cause. Water builds up, the soil saturates and the load doubles. The wall was fine until the first wet winter.

Footings Too Shallow

Posts or a base that do not go deep enough to resist the overturning force. It leans slowly and it cannot be pushed back.

Backfilled with the Wrong Material

Clay compacted straight against the wall holds water and swells. Free-draining aggregate is not an upgrade. It is the design.

A Surcharge Nobody Accounted For

A driveway, a shed or a car parked above a wall that was designed for a garden bed. The wall did not change; the load did.

Timber, Given Time

It rots at the back first, where you cannot see it, and it looks sound right up until the day it does not.

Worried about a wall you already have? Tell us what it is doing.

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How We Build One

Footings First, Drainage Before Backfill

The order matters more here than on any other job on this site, because once it is backfilled nothing behind the wall can be inspected or corrected.

Galvanised steel H-posts concreted into footings with the first sleeper in place — Posts in and braced. Footing depth comes off the wall height, not off habit.

01

Measure, and Check the Height

Length, height and what sits above it. If it needs engineering or a permit we tell you at this point rather than after you have committed.

02

Excavate and Set the Footings

The bank cut back, footing holes bored to depth, and posts or a base footing set in concrete and braced until it goes off.

03

Build the Wall

Sleepers slid down between the posts, or blocks laid and core-filled, or formwork set and the wall poured. The fastest part of the job.

04

Drainage, Then Backfill

Ag line, aggregate and geofabric in behind the wall before any soil goes back. This is the step that decides whether it is still straight in twenty years.

05

Backfill, Compact and Finish

Soil back in layers, the top made good, and the discharge point checked so water actually leaves rather than pooling at the end of a pipe.

Boundaries and Neighbours

The Part That Is Not About Concrete

A wall on or near a boundary involves someone else's land, and that is worth thinking about before it is built rather than during a disagreement.

01

Whose Wall Is It?

Generally the person who benefits from the level change is responsible, but it depends on who cut or filled and when. Worth establishing early.

02

Excavating Near the Boundary

Building the wall usually means digging behind it, and behind it may be your neighbour's ground. Access and support both need agreeing.

03

Talk to Them First

Almost every retaining wall dispute we hear about started as a surprise. A conversation before the excavator arrives prevents most of them.

04

Council Setbacks Apply

How close a wall can sit to a boundary, and how high it can be there, is a council question. It varies, and it is worth asking before design.

05

We Build It, We Do Not Adjudicate It

We will tell you plainly what the job involves and where the boundary questions sit. Who pays is between you and your neighbour.

Comparing Quotes

What to Ask a Retaining Wall Builder

Retaining wall builders are hard to compare on price, because the expensive half of the job ends up buried. These six questions surface nearly all of the difference. Read across.

Where does the water go?

The answer that should worry youA shrug, or somewhere behind the wall

What we sayThe pit, soakwell or low point it discharges into, named before we quote

How deep are the footings?

The answer that should worry youA habit rather than a number

What we sayA depth taken off your wall height and your soil, and we will tell you both

Is aggregate and geofabric included?

The answer that should worry youNot mentioned, or listed as an extra

What we sayBoth in the price, because a wall without them fails slowly and invisibly

Does this height need engineering?

The answer that should worry youNo, without looking at the height

What we sayMeasured on site. Past about a metre it almost certainly does, and we say so

Who is handling the council side?

The answer that should worry youLeft vague, or left to you

What we sayStated in writing, in the quote, so nothing stalls halfway

And what happens to the spoil?

The answer that should worry youQuietly excluded

What we sayCarted away and costed, because cutting into a bank always produces it

A builder who answers all six the same way we do is worth comparing on price. One who cannot answer the first one has priced a fence.

Got a quote in front of you? We will read it against ours, line by line.

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What It Depends On

Retaining Wall Cost: What Actually Moves the Number

Retaining wall cost varies more than almost anything else we quote, because so much of it is in the ground rather than in the wall.

Weep holes along the base of a rendered concrete retaining wall with a pebble strip — Weep holes and a discharge point. Ask any quote where the water is going, the answer tells you a lot.

Height, and Therefore Engineering

The biggest factor. Over about a metre brings design fees, deeper footings and more material, and the cost rises faster than the height does.

Length

Straightforward, and the one thing people usually estimate correctly themselves.

The Type of Wall

Sleeper, core-filled block and poured concrete are three quite different numbers for the same height and length.

Excavation and What Comes Out

Cutting into a bank produces spoil that has to go somewhere. On a tight site with no machine access this can be the largest line on the quote.

Drainage and Where It Discharges

Ag line, aggregate and geofabric are not optional, and connecting the discharge to stormwater is extra again. Any quote without them is not cheaper, it is different.

Access for the Machine

A back yard an excavator can reach is one job. One that has to be dug by hand or reached through a neighbour's block is another.

The Next Step

Get a Price for Your Retaining Wall

Send the rough length, the height you need to hold, and a photo of the slope. Tell us if it is anywhere near a boundary. We quote as retaining wall builders rather than as a rate per metre, so the measure is free either way.

What Happens After You Send It

We come out and measure it, free, and look at the ground and the access.
You get one written price for the whole job, not a rate per square metre.
If you go ahead, you get a start date and the same crew from quote to pour.

Would rather talk it through? (03) 6724 3698, or send the details through the contact page.

Retaining Walls Across Launceston

Plus the wider Launceston area. See every suburb we cover.

Common Questions

Retaining Wall Questions We Get Asked in Launceston

How do I choose a retaining wall builder?

Ask where the water goes, how deep the footings are, and whether drainage aggregate and geofabric are in the price. Most retaining wall builders quote the visible wall and leave the buried half vague, which is why two quotes for the same job can look so different. A quote that names the drainage is the one worth comparing.

Do I need council approval for a retaining wall?

Usually if it is over about a metre high, and often sooner if it is near a boundary or if there is a driveway, shed, pool or parked car above it. It varies between councils, so the honest answer is that we check for your job rather than quote a rule. If yours needs engineering or a permit, we tell you at the measure rather than after you have committed.

How thick does a concrete retaining wall need to be?

For a poured wall it comes from the engineering, the height, the soil and anything loading the top all feed into it, and there is no rule of thumb worth quoting. For sleeper walls the sleepers are a standard product and the design work is in the post size, the post spacing and the footing depth instead.

Why do retaining walls fail?

Almost always water. Saturated soil is far heavier than dry soil and it pushes sideways with real force, so a wall without drainage behind it is holding a load it was never designed for every time it rains. Shallow footings, clay backfilled straight against the wall, and timber rotting from the back are the other four.

What does a retaining wall cost?

Retaining wall cost is driven by height first, past about a metre it brings engineering, deeper footings and more material, then by length, the type of wall, the excavation and where the water discharges. A concrete sleeper retaining wall is the most affordable option we will stand behind; timber is cheaper on the day and it is the wall we get called back to replace.

Do retaining walls need drainage?

Yes, always, and it is the part most often left out of a cheap quote. An agricultural drain along the base, clean aggregate up the back, geofabric between the stone and the soil, and somewhere for the water to discharge. A quote without those is not a cheaper wall, it is a different and shorter-lived one.

Can you build a retaining wall on the boundary?

Often yes, but it involves your neighbour's ground and your council's setback rules, and building it usually means excavating behind it. Establish who is responsible and talk to your neighbour before the machine arrives, nearly every dispute we hear about began as a surprise.

Concrete Retaining Walls in Launceston