Adelaide · Adelaide
Licensed concrete specialists serving Adelaide and surrounding suburbs. BLD 317725 · Free on-site quote within 48 hours.
Opal SA Construction (BLD 317725) provides professional retaining walls services in Adelaide and all surrounding suburbs across Adelaide's metro area. Our own trained crew — no subcontractors — handles every job from site preparation through to final finish and cleanup.
We quote on exposed aggregate, coloured oxide, broom-finish, and plain grey concrete in Adelaide. Every job receives a fully itemised written quote within 48 hours of our free on-site measure.
| Finish | Price (installed) |
|---|---|
| Plain grey broom | $75–$95 / m² |
| Coloured / oxide concrete | $95–$120 / m² |
| Exposed aggregate | $140–$200 / m² |
All prices are fully installed and include excavation, compacted roadbase, reinforcement mesh, concrete placement, finishing, control joints, curing compound, and site cleanup. For non-standard sites requiring extra excavation, removal of existing concrete, or heavy compaction work, an additional base preparation charge of $20–$50/m² applies — quoted separately before any work begins.

We live in a city of hills, sloping blocks and soil that loves to slide after a big winter storm. That’s why Opal SA Construction builds Adelaide retaining walls that hold back earth, channel water and still look like a garden feature not a fortress. From a neat garden edge in Prospect to a two metre wall taming a Marion hillside, we pour concrete, stack stone and add colour so your yard stays put and looks the part. One local crew, one fixed price, one rock solid wall, guaranteed for life.

Installation
Pick a date and we’ll be there with shovels, laser levels and a playlist you can actually hum along to. We dig, set steel posts, pour the concrete or stack the stone, back-fill with free-draining gravel and shape the wall so it follows your garden’s natural lines.
Maintenance
Every couple of years we’ll ping you with a quick text: “Ready for a pressure-wash and fresh seal?” Ten minutes with a hose, a stiff broom and our DIY kit keeps moss and salt marks away. Or we’ll swing by while you’re at work, job, no fuss.
Repair
Crack from tree roots, bulge from water build up or chipped cap from the teenager’s skateboard? We cut out the damaged section, match the color and texture, then patch and reseal so the repair disappears and your lifetime warranty stays rock solid.

Designed by locals, built for locals: We turn up in a dusty ute, coffee in hand, and walk your block with you. We check the slope, poke the soil and sketch a wall that sits right, drains right and looks like it grew there.
Strong and pretty: Sure, it has to hold back a hill of clay, but it should also frame your roses. We blend steel, concrete and stone.
Peace of mind promise: Every block is engineered, every post is steel-reinforced and every pour is signed off by our ticketed crew. If it shifts or leaks, we’re back no arguments, no extra invoices.

Turn steep into useful: A slope that once spilled soil onto the lawn becomes a flat veggie patch, a fire pit deck or extra play space for the kids. We laser-level every footing and add hidden drainage so the new terrace stays level and solid.
Stop erosion in its tracks: Adelaide storms can send a hillside sliding. Our walls are built with weep holes and free draining gravel that take the pressure off the soil behind them so your garden (and your neighbor's fence) stays put.
Your wall, your style: Plain grey for a clean look, charcoal for a modern edge, exposed aggregate for texture, or stone veneer for rustic charm. The color runs right through the concrete, so chips never show.
Low upkeep, long life: No repainting, no replacing rotten sleepers. A quick sweep and hose once a year is all it takes. The sealed surface shrugs off salt, sun and soil movement for decades.
Call Javed on 0466 801 058 or fill in the form. Written quote within 48 hours.
We proudly provide our services in the following areas:
Licensed concrete contractors serving Adelaide and surrounding Adelaide suburbs. BLD 317725 · fully insured · free on-site quote within 48 hours.