Sydney’s heavy clay soils, flat backyards and intensifying wet seasons turn good gardens into bogs. We design and install garden drainage that actually works, sub-surface drains, swales, ag lines and stormwater pits and we finish the garden back better than we found it.
4.9 Google rating
76+ verified 5-star reviews
Licensed gardener
& landscaper in NSW
15+ years experience
Sydney residential & commercial
Fixed-price quotes
Work guaranteed
Diagnosis
When does a Sydney garden need drainage?
A garden tells you when its drainage has failed. The grass goes spongy days after rain. Garden beds smell sour. Water marks creep up the brickwork. Pavers lift, gravel washes out, mulch floats away.
Sydney makes these problems worse than most cities. Much of the basin sits on heavy clay that drains slowly even in dry weather. Add the recent run of wet summers, an undersized stormwater system, or a backyard that’s been compacted by sheds, pools or play equipment, and a once-healthy garden can hold water for days. Drainage isn’t a luxury upgrade, it’s what stops the rest of your garden, paving and even your home from being damaged.
Pooling that won’t drain
Water that sits on the lawn for hours or visible puddles still there the next morning is the classic warning. The soil profile underneath is either saturated, compacted or graded toward the house.
Spongy or yellowing turf
A lawn that squelches underfoot, develops yellow patches in low spots or grows more moss than grass is being slowly drowned. Roots need air; saturated clay starves them.
Erosion or silt build-up
Mulch washing across the path, soil collecting at the base of slopes, or gravel migrating away from beds means surface water is moving without being controlled and taking your topsoil with it.
Water against brickwork
Stains, efflorescence (white salt marks) or persistent damp on lower courses of brick mean stormwater is reaching the house. Left long enough this affects render, footings and internal walls.
Retaining walls bowing
A tilted, cracked or stained retaining wall almost always points to drainage failure behind it. Water builds hydrostatic pressure no wall is designed to hold indefinitely.
Mosquitoes & foul smells
Standing water turns garden beds into mosquito habitat and produces the sour anaerobic smell of soil that has been wet too long. Both are signs the ground can’t shed water on its own.
Solutions
Garden drainage solutions, matched to your soil and slope
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Sub-surface French drains
Most common
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Swales & surface channels
Sloped blocks
03
Spoon & channel drains
Hard surfaces
04
Stormwater pits & outlets
Collection
05
Retaining wall drainage
Built-in
06
Re-grading & soil improvement
Foundation step
07
Permeable surface design
Design-led
Process
Fixed pricing. Quoted on site. No surprises.
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We’re gardeners, not just diggers
Most drainage contractors leave you with a working drain and a wrecked garden. We install drainage and reinstate the lawn, beds, mulch and edges back to a finished garden. It’s our day job.
15+ years of Sydney clay
We know the clay belt across Sydney, where the soil sits, where the water tables run high, which streets cop the worst of the runoff. That informs what we specify, not a textbook.
Fixed pricing, work guaranteed
One quoted price, in writing. If we hit something unforeseen, old buried slabs, rock, undocumented services, we stop and tell you before any extra cost. Workmanship is guaranteed.
Residential & commercial
We service Sydney homes, strata properties, NDIS clients and commercial grounds. The principles are the same, read the site, specify properly, finish to the standard the property deserves.
Integrated with the garden you actually want
Drainage rarely sits alone. We routinely combine it with retaining walls, paving, new turf and full landscaping so the site is opened up once and finished levels match the design.
Why A1 Gardening & Landscaping
A gardener-led approach to garden drainage
“Drainage looks simple. It rarely is. The right system depends on soil, slope, where the water has somewhere to go, and what the garden has to look like when we’re done. That’s the part most people get wrong.”
— A1 Gardening & Landscaping Sydney
Reading further
For homeowners researching how drainage relates to retaining walls, our guide on timber retaining wall drainage covers why hydrostatic pressure is the most common reason walls fail in Sydney.
Sydney Water also publishes useful homeowner guidance on stormwater responsibilities at sydneywater.com.au worth reading before any drainage work.
Pairs With
Drainage rarely sits alone, combine it with the work you were already planning
Retaining Walls
Every new wall we build includes properly specified drainage behind it — ag line, drainage aggregate, filter fabric and weep holes. It’s the single biggest factor in whether the wall lasts.
Paving & Hard Surfaces
Channel drains, spoon drains and permeable paving designed into new patios, driveways and courtyards. We install paving over properly graded sub-base so water moves where you need it to.
Turf & Lawn Restoration
If drainage has destroyed the existing lawn, we strip, improve the soil profile, install the drainage and lay new turf — buffalo, kikuyu or couch — to suit your aspect.
Costs
What drives the cost of garden drainage in Sydney?
Every site is different. The fixed-price quote you receive after our site visit reflects four main variables.
Size & length of the system
A short French drain along one boundary is the cheapest job we quote. A whole-of-property system with multiple pits and re-grading sits at the top end. Most Sydney residential drainage jobs fall in between.
Soil & access conditions
Heavy clay needs more aggregate and filter fabric. Tight side access (narrow walkways, no machine access) means hand-dug trenches and slower work. Rock or unexpected buried slabs cost extra and we always tell you before adding anything.
Reinstatement scope
Most quotes include putting the lawn, mulch and edging back. If you’re combining drainage with new turf, paving or a retaining wall, the per-square-metre cost typically drops, the ground is only opened up once.
Outlet & connection
Where the collected water discharges to a legal stormwater point, an absorption trench, an existing pit or a sump pump changes both the engineering and the price. Part of the site visit is finding the right outlet.
For a fixed-price quote on your specific site, request a quote online or call 0451 267 287. Site visits are free and there’s no obligation.
Questions
Garden drainage, asked & answered
Garden drainage costs vary with site size, soil conditions, access and the system installed. A small surface drain or short French drain is typically the lowest-cost option, while subsoil systems with ag line, stormwater pits and re-grading sit at the higher end. We inspect the site first, then provide a fixed-price quote so you know the full cost before any work starts.
Common signs include water pooling on the lawn for hours or days after rain, soggy or spongy turf underfoot, moss or yellowing grass in low spots, dirty water marks against the home, and erosion or silt build-up beside paths and retaining walls. In Sydney, clay-heavy soils make these problems worse because water drains slowly through dense clay.
A French drain is a sub-surface trench with a perforated pipe surrounded by gravel and filter fabric that collects and redirects groundwater. A swale is a shallow, shaped channel on the surface that guides stormwater across the property. French drains handle saturated soils; swales handle volume runoff. Many Sydney gardens need both and we’ll specify which after the site visit.
Yes, in almost every case. Water builds hydrostatic pressure behind a wall and is the most common cause of wall failure. Drainage behind a retaining wall typically includes ag line, drainage aggregate and a filter fabric layer, with weep holes or a sub-surface outlet to take water away. For a fuller explanation, see our guide on timber retaining wall drainage.
Yes, and it’s usually cheaper to do drainage as part of a wider garden project. We routinely combine it with new turf, mulching, paving, retaining walls and full landscaping so the ground is opened up only once and finished levels match the new garden design.
Yes. A1 Gardening & Landscaping Sydney is a licensed gardener and landscaper with 15+ years of experience servicing Sydney residential and commercial properties. All work is guaranteed and quoted at a fixed price.
The three most common causes in Sydney are heavy clay soil that holds water, compacted ground from foot traffic or construction, and poor grading that lets stormwater sit instead of run off. The fix usually combines re-grading, soil improvement and a sub-surface drain so water has somewhere to go.
We provide garden drainage solutions across Sydney for both residential and commercial properties. Call 0451 267 287 or request a quote online to book a no-obligation site visit.
Most residential drainage jobs take between one and four days on site, depending on length, access and reinstatement. A simple boundary French drain might be a one-day job; a larger system that includes pits, re-grading and new turf can take a working week. We give you the timeline in the fixed-price quote so you can plan around the work.
Where We Work
Garden drainage across Sydney
A1 Gardening & Landscaping Sydney provides drainage solutions for gardens, lawns and outdoor spaces throughout Sydney for residential and commercial properties. Whether it’s a small backyard, a strata grounds project or a full landscape build, we work across Sydney from one team.
If you’ve been searching for garden drainage near me or garden drainage companies near me in Sydney, we’re the local team. One call, one site visit, one fixed-price quote on a drainage solution for your garden.
Ready to start
Book a free site visit. Get a fixed-price quote
No phone-quotes, no estimates that move once we arrive. We come out, read the site, and write a quote you can rely on.
