Retaining Walls
A retaining wall holds back ground, and the ground it holds back is heavier and more active than it looks, especially after rain. Most failed walls did not fail because the blocks were wrong. They failed because the water behind them had nowhere to go, or because the footing was not built for the load above it.
Sloped blocks limit how much of your property you can actually use, and left alone they erode over time. We build retaining walls that terrace the site into usable space, with proper drainage behind the wall so water pressure never becomes the next problem.
- Terraces sloped land into usable space
- Prevents soil erosion
- Proper drainage design behind the wall
- Natural sandstone and block options
Drainage behind the wall
Saturated soil behind a wall is dramatically heavier than dry soil and pushes far harder. Every wall we build gets drainage behind it: a drainage aggregate backfill and an agricultural line that takes water to a discharge point rather than letting it build up. This is the single most common thing missing from walls that bulge, lean or blow out, and it is entirely invisible once the job is finished.
Footings and what sits above them
The footing carries the wall and everything the wall is holding. We build footings to suit the height, the material and what sits above the wall, because a wall retaining a garden bed and a wall retaining a driveway are carrying very different loads. Walls above certain heights need engineering and approval, and we will tell you when your job is in that territory rather than building to the edge of it and hoping.
Materials: block, natural stone and timber
Concrete block walls are structural, predictable and suit height. Sandstone gives a softer, more established look and sits well against Central Coast gardens, and it is closely related to the stone cladding work we are known for. Timber is cost-effective for lower walls but has a finite life outdoors. Material choice is partly aesthetic and partly about what the wall actually has to do.
Terracing and how walls sit in a garden
On a sloped block, two lower walls often work better than one tall one: less load on each, more usable flat space, and a result that looks built into the site rather than bolted onto it. Steps, planting pockets and the transition to paving are worth planning at the same time, because retrofitting them into a finished wall is expensive.
Where we do retaining walls
Across the Central Coast, Lake Macquarie and Newcastle.
Retaining Walls, answered.
Do I need council approval for a retaining wall?
It depends on height, location and what the wall is retaining, and requirements differ between councils. Lower garden walls are often exempt; taller walls and anything near a boundary or structure generally need approval and engineering. We flag it when your job is in that territory.
Why do retaining walls fail?
Most commonly drainage. Water builds up behind the wall, the soil load increases substantially, and the wall leans, bulges or fails. Inadequate footings for the load above are the other common cause. Both are decisions made during construction and invisible afterwards.
How long does a timber retaining wall last?
Treated timber walls have a finite life outdoors and will need replacing eventually, which is the trade-off for the lower up-front cost. Block and stone walls built with proper drainage and footings are effectively permanent. We will tell you honestly which makes sense for your situation.
Can you match a new wall to existing stonework?
Usually we can get very close with sandstone, though natural stone varies between batches and weathering changes existing work over time. We would rather show you the likely result before starting than promise an exact match.
Other Services
More ways we can help.
Pool Surrounds
Coping, paving and non-slip finishes engineered around the drainage and chemical exposure of a working pool edge.
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Natural stone, travertine and paver driveways, patios and pool decks, laid level and built to shed water the right way.
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Exposed aggregate, plain and coloured concrete for slabs, paths and driveways built for Central Coast weather.
Learn moreGarden & Landscape Design
Garden beds, paths and planting design that ties the whole property together, fence line to pool edge.
Learn moreFull Service Landscape & Construction
Complete backyard transformations, from first sketch to a finished space your family will actually use.
Learn moreFencing
Quality fencing for privacy, pool safety and property definition.
Learn moreStone Cladding
Premium stone cladding work, one of the areas we're best known for.
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