Blocked stormwater drains in the Redlands
Updated October 2026
Stormwater and sewer are separate systems. Stormwater carries rain off the roof and the surface of the property, and it blocks for its own set of reasons: silt, sand, leaves, roots and a lack of fall. It usually announces itself in a downpour, with water pooling where it should not and gutters overflowing even though the gutters are clear. Redlands Blocked Drains connects you with QBCC-licensed local drain plumbers who clear and diagnose stormwater problems across the Redlands.
Why the Redlands is a stormwater region
Three things come together here.
The mainland is low-lying bayside land with flat grades. A stormwater run with very little fall moves water slowly, and slow water drops its load, so silt and sand settle in the pipe instead of flushing through. Over a few years the effective bore halves.
The rainfall is subtropical and arrives in volume. A summer storm can deliver more in an hour than an old flat-grade system was ever sized to carry, and it arrives carrying leaf litter off mature street trees.
And then there is the tide. On the foreshore streets at Thorneside, Wellington Point, Cleveland, Victoria Point, Redland Bay, Coochiemudlo Island, Amity Point and Point Lookout, a king tide coinciding with heavy rain means the system has nowhere to discharge to. That is surcharge rather than blockage, and it is a different problem with different answers. The stormwater, tides and surcharge page deals with it properly.
The signs
- Water pooling in the yard or against the house hours after the rain stops
- Gutters overflowing at the downpipe even though the gutter itself is clear
- A surface pit or grate that fills and stays full
- Water tracking back towards the slab, a garage or a lower-level room
- Gurgling or bubbling from a stormwater pit during rain
- Sand or silt washed out across a path or driveway after a storm
What actually blocks them
- Silt and sand. The dominant cause on flat runs and anywhere near sandy coastal ground.
- Leaves and bark. Figs, eucalypts and melaleucas shed constantly along the old bayside streets.
- Roots. Stormwater joints leak, which is exactly what a tree is looking for.
- Collapsed or crushed pipe. Older stormwater line is frequently thin-walled and shallow, and a vehicle crossing it or a renovation above it does damage.
- No fall, or back-fall. The pipe was laid flat, or the ground has settled. Nothing clears this permanently because there is nothing blocking it.
- A downpipe connected into a line that cannot take it, common where a patio, a second roof or a shed was added later.
What a plumber does about it
A camera is more useful in stormwater than most people expect, because it distinguishes between a blockage and a grade problem. Silt and roots can be jetted out, and water is the right tool for silt because a cutter will not move it. If the footage shows a bellied or back-falling section, no amount of clearing will fix it, and the honest answer is re-grading, a new pit, or a redirected downpipe.
On the surface, the cheap and effective work is often overlooked: clearing and re-seating grates, installing or replacing silt pits so sediment is caught somewhere you can empty it, and getting downpipes discharging into something adequate rather than onto the ground beside the slab.
Where it discharges matters
A stormwater system has to discharge somewhere legal, usually to the kerb, to a lawful connection point or to an approved on-site arrangement. Running it onto a neighbour's land or into the sewer is not a fix, and connecting stormwater into a sewer line causes problems in both directions. If a previous owner has done either, that is worth knowing before you spend money clearing a symptom.
On the foreshore, work near the water can attract extra assessment. The Redland City Plan runs a coastal protection erosion prone areas overlay and a flood and storm tide hazard overlay, and those maps are the authority for any particular property. The council's overlay maps, not this page, tell you what applies to yours.
What it costs
A standard stormwater clear typically runs $150 to $400 in the Redlands. Silt removal from a long flat run takes longer and sits higher. A camera inspection typically runs $249 to $600, or $350 to $900 with jetting. Re-grading a run, installing pits or replacing collapsed sections is construction work and is quoted on the job. The cost guide has the ranges.
Before any digging, use Before You Dig Australia to find out what is in the ground, and note that on low-lying estuarine land the Redland City Plan maps potential acid sulfate soils, so excavation and dewatering below the natural surface can trigger management requirements. The contractor confirms that before quoting.
Frequently asked questions
Is stormwater the council's responsibility?
The council's stormwater network is the council's. The drainage on your own property, from the roof and the surface to the lawful discharge point, is yours. If a council pit or kerb inlet is blocked, report it to the council.
Why does my yard flood when my neighbour's does not?
Usually fall, soil and where the water is being sent. A camera and a level check on your own runs is the starting point, and the answer is often a grade problem rather than a blockage.
Can tree roots get into stormwater pipes?
Readily. Stormwater joints are often looser than sewer joints and the pipe carries exactly what a tree wants. The roots get cut out of the pipe and the pipe gets cleaned or relined. The tree stays.
Will a bigger downpipe fix it?
Sometimes, if the restriction is the downpipe. More often the downpipe is fine and the underground line has no capacity left, in which case a bigger downpipe just moves the overflow.
My drain only floods on a king tide. Is it blocked?
Probably not. That is surcharge, which is the system backing up because it has nowhere to discharge at high water. See the stormwater, tides and surcharge page.