How it works
Sixty seconds on the form, no account, no call centre.
We pass it straight to one of the experienced, insured local retaining wall builders who works your suburb.
Free quote, no obligation. You deal with them directly from there.
The approval trigger almost nobody mentions
Every retaining wall page you will read today says the same thing: over a metre needs approval. That is half the story in Logan, and the half that gets people into trouble is the other one.
Logan City Council's published criteria also catch a wall built closer than 1.5 metres to any other building or retaining wall, regardless of the height of the walls. A knee-high garden wall, well under a metre, sitting a metre from the house or from the wall your neighbour built, is in approval territory on distance alone. On a small estate lot where the boundary cut sits close to the slab edge, that is the normal case rather than the exception, and it is the single most common reason a wall that looked too low to matter turns out not to be.
What Logan City Council actually publishes
Logan is unusual in South East Queensland. The council publishes its own criteria rather than leaving you to guess, which means you can check your wall before you call anyone.
Its domestic building approval requirements document treats a retaining wall up to 1 metre high from natural ground level as accepted building work, provided no loads are imposed above it, such as a building, a structure or a driveway. Approval is required where the total height of the wall and of the fill or cut retained by the wall is greater than 1 metre, where retaining walls are constructed closer than 1.5 metres to any other building or other retaining wall regardless of the height of the walls, or where there is surcharge loading over the zone of influence for the wall.
The rules behind those criteria sit in the Building Regulation 2021. Logan City Council and private building certifiers are the ones who apply them. The QBCC is a different thing: it licenses the contractor, and in Queensland building work valued over $3,300 generally requires a QBCC licensed contractor. The council's criteria document is undated on its face and councils revise this material, so confirm the position for your own wall with Logan City Council or a private building certifier before you build.
Check whether your block is in the slope overlay
Parts of Logan sit inside the Logan Planning Scheme 2015 landslide hazard and steep slope area overlay, and the trigger is mapped on slope. A property report in the council's own document store shows it as landslide at or above 15 per cent slope.
The mapping runs parcel by parcel rather than suburb by suburb, so nobody can tell you from the suburb name alone. Logan City Council's property report for your address can. If your block is steep, that report is the first thing a builder should check, because it changes what the council will accept.
Why Logan walls fail
Logan is retaining wall country twice over, in two markets that barely overlap.
The growth front in the south and west, at Yarrabilba, Flagstone, Logan Reserve, Park Ridge and the hills behind Beenleigh at Bahrs Scrub and Windaroo, is cut-and-fill country. Blocks were benched into sloping ground, the builder's contract stopped at the slab, and the back half of the yard was left at natural ground with a retained edge somebody still has to pay for.
The established belt in the north-east, at Daisy Hill, Rochedale South, Cornubia, Shailer Park, Springwood and Underwood, has the opposite problem. Those are larger homes on bigger, hillier blocks from the 1980s and 1990s, and the timber sleeper walls that came with them are now 30 years old. That is a repair and replace market, which is why retaining wall repairs carries as much weight on this site as new work does.
The cause of failure is the same either way. Rain here arrives in bursts rather than steadily, the soil behind the wall saturates, and water that cannot escape pushes the wall forward. Water, not weight, is what kills walls, which is why drainage behind walls gets its own page, and why a wall that has already moved should go straight to leaning or collapsed wall.
What retaining walls cost
As a rough 2026 guide, a wall about a metre high runs from around $200 per metre for timber up to $700 or more per metre for stone and engineered block, with concrete sleepers in between. Height, access, soil, drainage and engineering move every number, which is why these are guide figures and quotes are free. Our retaining wall cost guide breaks down the ranges by material and the questions that make quotes comparable.
How this service works
Logan Retaining Walls is a local referral service, not a construction company. You tell us what you need, we pass it to one of the experienced, insured local retaining wall builders who works your suburb, and they call you back with a free, no obligation quote.