Who is responsible for blocked sewer drains in Australia?
The property owner is responsible for the private sewer pipes on their property, up to the point where they connect to the water authority's main. In Sydney, that authority is Sydney Water — they're responsible for the mains and the connection point itself.
Every Sydney property has a private sewer service — the pipes that carry wastewater from your fixtures, through your land, to a junction with Sydney Water's sewer main. Everything on your side of that junction is yours: your pipes, your maintenance, your repair bill. Everything from the junction onwards — the main, the manholes, the network — is Sydney Water's.
The catch: from the surface, you can't tell which side a blockage is on. A CCTV drain inspection settles it in half an hour, with footage and a located position for the fault.
Who is responsible — tenant or landlord?
In NSW, the landlord is generally responsible for plumbing repairs, including blockages caused by tree roots, pipe defects or normal wear. The tenant can be liable if they caused the blockage — wet wipes, sanitary items or fat poured down the sink are the classic examples.
A blocked or overflowing sewer counts as an urgent repair under the NSW Residential Tenancies Act 2010, which means shorter timeframes and, if the landlord can't be reached, a right for the tenant to arrange repairs up to a capped amount and be reimbursed. Tenants: report it to the agent in writing, straight away. Landlords: a $0 quote conversation with us beats an overflow claim every time.
What about strata and shared drains?
In a NSW strata scheme, pipes that service more than one lot — or that sit in common property — are the owners corporation's responsibility. Pipes that service only your lot, within your lot, are usually yours.
In practice: a blocked branch line from your own kitchen sink is likely a lot-owner cost, while the shared stack or the main under the driveway belongs to the owners corporation. Where the boundary is genuinely unclear, the CCTV footage (showing exactly where the fault sits) is what the strata manager will ask for anyway.
Who pays for a broken sewer pipe under the street?
Whoever owns the pipe — not whoever owns the land above it. Your private sewer service can legally run beneath the footpath or road before it reaches the main; it's still your pipe all the way to the connection point.
This surprises a lot of owners. The good news: a fault that deep and that far along is exactly where trenchless relining shines — no council road-opening permits, no excavation under asphalt, no traffic control bill.
Who is responsible for tree roots blocking drains?
The owner of the blocked pipe — even when the offending tree belongs to a neighbour or the council. Recovering costs from a tree owner generally requires proving negligence, which is rarely practical.
Roots don't smash their way in; they find existing weaknesses — usually the joints of pre-1980s earthenware pipes — and follow the moisture. That's why the durable answer is fixing the pipe (jointless relining leaves roots no way back in), not blaming the tree. More on this in our tree roots guide.
Does insurance cover it?
Usually only partly. Most home policies cover sudden accidental damage and the resultant damage (flooring, carpets, walls), but exclude gradual processes — and tree root intrusion, corrosion and wear are typically classed as gradual. Check your PDS.
Two practical tips. First, some policies distinguish between the damaged pipe (excluded) and the damage the failure caused (covered) — worth claiming even when the pipe itself isn't. Second, insurers ask for evidence: a CCTV inspection report with footage is exactly that, and you get one with every job we do.
The 60-second version
- Your land, your pipes — up to the Sydney Water connection point, even under the footpath.
- Sydney Water's main? Call 13 20 90 — their fix, their cost.
- Renting? Landlord pays unless the tenant caused it. Sewer overflows are urgent repairs.
- Strata? Shared pipes = owners corporation; your-lot-only pipes = usually you.
- Tree roots? Pipe owner's problem regardless of whose tree. Fix the pipe.
- Not sure? A camera inspection answers the question with evidence.