Property planning • Sunshine Coast to Hervey Bay
A retaining wall can turn a sloping yard into a more usable space. But the blocks, sleepers or stone you see are only part of the job. What supports the wall—and what happens to water behind it—matters just as much.
If you’re creating level ground, supporting a driveway or replacing an old wall, start by choosing a system that suits the site and the loads it needs to support. Here are the main options to discuss with a builder around the Sunshine Coast, Gympie and Hervey Bay.
This is a planning guide, not a site-specific construction design. Wall dimensions, footings, post sizes, reinforcement and drainage must suit the soil, height, loads and selected system. Confirm the applicable approvals, building requirements and product instructions with your certifier and designer. Where professional engineering is required, use an appropriately registered RPEQ or a person working under their direct supervision. This article and its images do not certify a wall as compliant.
Garden edging separates lawn, mulch and garden beds. A retaining wall holds back soil where there is a difference in ground level. A small border should not be used to support a raised area simply because it looks sturdy.
Think about the whole site: the ground above the wall, nearby driveways and buildings, buried services, boundaries and where stormwater already flows. A fence on top also needs to be considered in the design.
Explore the options below to see which styles you like and what could suit your project. Whether you’re supporting a driveway, creating level ground, managing a slope or landscaping around your home, consider the appearance, budget, access and drainage. A retaining wall specialist can help you choose a suitable system for your site and the loads it needs to support.
Each type below has an image. The timber, concrete sleeper, interlocking block, sandstone and gabion examples are AI representations. The poured-concrete photograph has a source credit. These images illustrate appearance, rather than showing Cooloola Kerbing projects or construction details.
A warm, simple finish for garden terraces. Timber can suit a smaller project, but the timber grade, treatment and fixings need to match the job.
A familiar choice for Queensland yards, with plain, timber-look and textured finishes. Ask how the sleepers, steel posts and connections are specified for the site’s exposure.
These blocks can follow straight lines or gentle curves. Some systems suit low garden walls; higher walls or extra loads may need reinforcement extending into the soil behind them.
A good option to discuss where a rendered or solid finish suits the house. Core-filled masonry and poured concrete are different methods, and both need a coordinated structural design.
Large sandstone blocks and natural rock give a garden a softer, less uniform look. Access for machinery and enough room for the wall’s base can make a big difference to what is practical.
Wire baskets filled with stone create a textured finish. They may suit a landscape where there is room for their width, but the basket coating and stone selection need to suit the exposure.
Compare the excavation, drainage, access and engineering included in each quote—not just the price of the visible wall. Adbri’s retaining-wall range shows how sleeper and block systems differ.
After heavy rain, water needs a clear way out from behind the wall. Without it, pressure builds up against the structure. An agi pipe alone is not enough: the gravel, filter, pipe and outlet have to work together.
Fraser Coast Council says most retaining walls need subsoil drainage, and some also need a surface drain at the top or base. Discharge must be lawful and must not cause damage or nuisance next door.
In Queensland, a typical arrangement includes the following. The actual sizes, materials and layout belong in the design for your wall:
For product examples, see HYBUILT’s drainage guide and Adbri’s Queensland/Tasmania segmental-wall guide. These are manufacturer guides, not a universal specification. Use the requirements for the actual product and site; do not transfer dimensions or installation details from another system.
Concept only—not to scale. This shows water-management relationships, not a buildable wall detail. Footing, pipe position, filters, reinforcement, surface grading and outlet design must be specified for the chosen system and site.
Ask for the current installation guide for the product being quoted, plus the site design and inspection requirements. WorkSafe Queensland’s retaining-wall safety alert highlights the need to manage stability and construction risks throughout the work.
Don’t assume “under one metre” means approval-free. Height is only part of the test. Nearby buildings or walls, surcharge loads, pool barriers, siting and other site constraints can change the requirements.
Sunshine Coast Council lists building-approval triggers including a wall exceeding one metre, being closer than 1.5 metres to a building or another retaining wall, surcharge loading, or forming part of a pool barrier. Gympie’s factsheet also requires accepted-development walls to meet planning, siting, structural and infrastructure conditions. Ask a building certifier to assess the complete proposal, including the cut or fill retained; do not judge the requirement from the visible wall alone.
Building and planning approvals are separate checks. Confirm both before starting. Where an engineering design is required, ask who will provide it and which requirements apply to your wall. BPEQ explains Queensland’s engineering registration requirements.
Common problems include choosing a wall from appearance alone, using one footing detail for every site, leaving drainage until the end, burying a drain without an outlet, filling behind the wall with unsuitable material, or adding a driveway, fence or extra fill later without checking the design.
Don’t assume two closely spaced terraces behave as separate low walls. Get the interaction checked. If an existing wall is leaning, bulging, cracking or losing soil, arrange an assessment before adding loads or digging around it.
The businesses below advertise retaining-wall services in these regions. Their advertised services and phone numbers were checked against their websites on 30 October 2026; current licence status, insurance and availability have not been independently verified. This is a starting list, not a quality ranking or an endorsement. Confirm your address, scope, availability, insurance and current QBCC licence suitability directly before engaging anyone.
Sunshine Coast
Retaining walls, excavation and structural landscaping.
Sunshine Coast / Gympie
Sandstone, bluestone and rock retaining walls; advertises coverage including Gympie.
Gympie / Sunshine Coast
Timber, concrete and block retaining walls, plus earthworks and site preparation.
Gympie / Sunshine Coast
Retaining walls, landscape construction, excavation and concreting.
Hervey Bay
Retaining walls, structural landscaping, bricklaying and masonry.
Hervey Bay / Fraser Coast
Retaining walls and structural landscaping, with fencing and minor earthworks.
Use the individual Google Maps links above to search by business name and region. Check that the result matches the business website before travelling, and contact the contractor to confirm service to your property.
Include your suburb, photos, approximate wall length and the difference in ground levels. Mention nearby buildings, driveways, fences, pools, access restrictions and any known drainage issues. Ask what the price includes:
A clear scope makes quotes easier to compare.
A retaining wall supports soil; garden edging gives lawns and beds a neat boundary. If your project also needs concrete garden edging or concrete resurfacing, Cooloola Kerbing & Concrete Resurfacing can discuss those parts of the work. Call 0467 280 692 for a free onsite quote.
Reviewed on 30 October 2026 against the linked council, Queensland Government and manufacturer material. This is homeowner planning information, not an engineering design, a complete reproduction of Australian Standards, or a compliance certificate. Your certifier and engineer must identify the standards and editions applicable to the actual work.
