Retaining Walls · Mosman
Mosman retaining wall and drainage upgrade
Old timber retaining walls replaced in Mosman with new timber and rendered besser block walls, new garden beds, and corrected drainage.
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Retaining wall builders in Sydney
Retaining walls for sloping Sydney blocks, failed walls, drainage problems and better garden levels, built in concrete block, timber or sandstone.
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- Concrete block, timber and sandstone
- Drainage built for the site
- Council and engineer coordination where needed
- Licensed, insured and qualified
- Free on-site quotes
- No call-out fee
Free quote
Tell us about the job
Send your suburb, a few photos and a short description of the job.
Service overview
Water behind the wall has to be managed from the start
New and replacement walls for sloping ground, failed timber or block walls, drainage and level changes.
Water trapped behind a wall adds pressure, so the drainage has to be planned with the structure rather than added later. We put up new walls and replace ones that are leaning, cracking, rotting or letting soil through. Before we recommend timber, concrete block or sandstone, we check the height, slope, soil, water, access and what sits above and below the wall, and we flag any approval or engineering work that has to be sorted before building starts.
Sandstone can suit a natural stone finish beside the house, steps or garden. The retained height, load above and access for stone and equipment still determine whether it suits the job. Timber and block offer different options; our retaining wall guide explains what we compare.
The size of the wall, excavation, footing, drainage, materials and access all affect the quote. Any required approval or engineering work needs to be identified before building starts, so you know what must be resolved and what the agreed work includes.
- Concrete block, timber and sandstone walls
- Ag-pipe drainage, weep holes and gravel backfill
- Failed wall replacement and sleeper wall rebuilds
- Council consent and engineer coordination where needed
- Slope reshaping and level changes
Inclusions
What the retaining work includes
The wall types, footings, drainage, backfill and finishing work needed to hold the ground properly.
Working out the right wall
We measure the slope and levels, check the soil and where water runs, and look at the fences, driveways, buildings and other loads around the wall. That tells us what wall and footing the site needs.
Concrete block and besser walls
Reinforced concrete block suits sites that need more height, more strength or a rendered finish. The footing, steel, filled blocks and drainage are built for the wall and the ground it is holding.
Timber sleeper walls
Hardwood or treated pine sleepers work well for lower walls and garden terraces. We set the posts at the right depth and spacing and install drainage, which is what most leaning old sleeper walls were missing.
Sandstone walls
We assess the retained height, the load above and access before recommending sandstone. The natural stone finish still needs a suitable structure and drainage for the ground it holds.
Drainage, backfill and water
Water trapped behind a wall adds pressure. Depending on the site we use ag-pipe, gravel, weep holes and a suitable discharge point before the wall is backfilled.
Related service: LandscapingReplacing a failed wall
We take out leaning, cracked, bowing or rotten walls and rebuild with the right footing, posts or reinforcement, drainage and material for the weight of soil behind it.
Reshaping a slope into levels
We turn a steep or awkward part of the yard into flatter garden areas with stepped walls. We work out the wall heights and soil movement so the new levels are usable and connect safely.
Related service: PavingFinishing the garden around it
We finish around the wall with garden beds, turf, paving or paths so the new structure reads as part of the yard rather than a separate job bolted on.
Related service: Gardening
Recent work
Recent retaining wall projects
Before-and-after jobs showing failed walls, excavation, drainage, construction and the finished garden.
Retaining Walls · Collaroy
Collaroy timber retaining wall
Timber retaining wall built on a steep slope in Collaroy to stop soil erosion and manage water runoff. Photos from the full build.
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Landscaping · Paving · Retaining Walls · North Sydney
North Sydney paving and retaining wall cladding
Sinking pavers and old retaining-wall cladding replaced in North Sydney, with drainage issues repaired as part of the landscaping makeover.
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Our process
How a retaining wall job runs
From checking the slope and the water to finishing the new wall and the garden around it.
Step 1
We check the slope, soil and water
We measure the levels, check the soil and drainage, and look at what sits above and below the wall. Anything likely to need council or an engineer gets flagged then.
Step 2
We choose the wall and agree the price
The written quote sets out the wall, the material, footing, drainage, backfill, price and any engineering or approval work needed.
Step 3
We excavate, build and drain it
We dig the footing trench, pour or compact the base, build the wall in courses or panels, install ag-pipe and gravel backfill behind it, and set the weep holes or discharge points. The site stays tidy and safe while we work.
Step 4
We backfill and finish the garden
We complete the backfill, compact in layers and finish the surrounding area as agreed. We walk the wall with you and check the drainage is running. Where the quoted job included engineering or an approval, you get those documents at handover.
Related advice
Worth a read
Plain guides to the work, what shapes the price and what to plan for
Retaining WallsWhy drainage matters behind a retaining wallA retaining wall has to manage the ground and the water behind it. These checks help explain why drainage belongs in the wall plan from the start.- Retaining WallsChoosing a retaining wall for a Sydney gardenTimber, block and sandstone suit different sites. The right starting point is the ground, the drainage, the load and the finish the garden needs.
Pricing GuideWhat changes the price of landscaping in Sydney?Landscaping costs in Sydney change with site access, soil, levels, drainage, materials, planting, and how much preparation is needed before the visible work begins.
Free on-site quote
Need a retaining wall built or replaced?
Call Sam or Chad, or send photos of the wall and the slope behind it.
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What to include
- Your suburb
- A few photos
- What you want done