TL;DR
Inside your property boundary, responsibility for a blocked drain sits with the owner — or the landlord, if the property is let. Once your drain crosses that boundary and joins the public sewer network, Scottish Water becomes responsible for it. Drains shared between neighbouring properties, common across Dundee's tenement stock, usually split responsibility between the connected owners. If you're not sure which side of that line your blockage falls on, request a CCTV drain survey online and we'll show you exactly where the fault sits before you contact anyone else.
Where Your Responsibility Ends and Scottish Water's Begins
Every property's drainage has two parts. The first is the **private drain**: the pipework running from the building itself to the boundary of the property, where it joins a public sewer. This section is the owner's responsibility to maintain, repair, and keep clear.
The second part is the **public sewer**, the larger network that carries wastewater onward to treatment. In Scotland, Scottish Water is the statutory sewerage authority responsible for this network — not the local council. Once your drain connects into that public system, any blockage or defect on the sewer side is Scottish Water's responsibility to fix, not yours.
The practical difficulty is that this boundary isn't visible from the surface. A blocked drain in your garden, on your driveway, or under your back green could sit on either side of that line, and the only reliable way to know which is to look — which is exactly what a CCTV drain survey is for.
Shared Drains Between Neighbouring Properties
Dundee's drainage isn't always neatly one property, one pipe. Much of the city's Victorian and Edwardian tenement stock — built during Dundee's jute-manufacturing era in areas like Stobswell, Lochee, and Hilltown — was constructed with a single underground drainage run serving several flats, laid beneath the shared back green and connecting to the sewer at one point. Where a drain serves more than one property, it's generally treated as a **shared, or private communal, drain**, and responsibility for maintaining and repairing it is split between the connected property owners rather than falling on one household alone.
This matters in practice because a blockage in a shared run affects everyone on that system at once — if your ground-floor neighbour's kitchen sink is backing up, the fault may well be in the section serving your flat too. Establishing exactly where a shared drain runs, and where a defect sits within it, is often the first step to agreeing repair costs fairly between owners.
Tenant vs Landlord: Who Actually Sorts It
Dundee has one of Scotland's largest student and rental populations, thanks to the University of Dundee and Abertay University sitting close to the city centre, which means the tenant-versus-landlord question comes up often. As a general principle, a landlord is responsible for keeping a rented property's drainage in good working order as part of their wider repairing obligations — this covers structural and system faults like root ingress, cracked pipework, or general wear.
Where it gets more nuanced is misuse. A blockage caused by something flushed or poured down a drain that shouldn't have been — wet wipes, cooking fat, sanitary products — sits closer to a tenant's responsibility for reasonable use of the property, and a landlord or letting agent may reasonably expect the tenant to cover that cost. Neither party should assume which applies without finding out what's actually causing the blockage first; a CCTV survey settles that question with footage rather than guesswork, which is useful for both sides when a cost needs agreeing.
How a Survey Pinpoints Where the Fault Actually Sits
Rather than debating boundaries and responsibility in the abstract, a CCTV drain survey gives you a factual answer: a camera run through the pipe, recorded on footage, showing exactly where a blockage or defect sits relative to the property boundary and the public sewer connection. This is particularly useful across the Tay in Fife towns like Newport-on-Tay, where hillside properties often have longer private drain runs down towards the road than a typical Dundee tenement, making the private-versus-public boundary less obvious at a glance.
Once we know where a fault sits, we can tell you plainly whether it's something we can fix directly, or something that needs reporting to Scottish Water because it's beyond the property boundary.
Frequently Asked Questions
**Blocked drains outside — who is responsible?** If the blocked section is within your property boundary, it's your responsibility as the owner, or your landlord's if you rent. Once the drain crosses the boundary and joins the public sewer, Scottish Water is responsible.
**Blocked sewer — who is responsible?** The public sewer network is maintained by Scottish Water. If a CCTV survey confirms the blockage is in the public sewer rather than your private drain, it should be reported to Scottish Water rather than fixed privately.
**Tenant or landlord — who is responsible for a blocked drain?** Landlords are generally responsible for keeping a rented property's drainage system in good repair. Blockages caused by tenant misuse, such as flushing the wrong items, are a different matter and are often treated as the tenant's responsibility to resolve.
**What if the blocked drain is shared with a neighbouring property?** Shared drains serving more than one property are usually a joint responsibility between the connected owners. A survey identifies where the defect sits within the shared run, which helps establish how a repair cost should be split.
**How can I find out which side of the boundary my blockage is on?** The only reliable way is to look. A CCTV drain survey traces the pipe run and shows exactly where a blockage or defect sits relative to your property boundary and the public sewer connection.
Not Sure Where Your Blockage Sits?
Guessing at responsibility before you know where a fault actually is can mean paying for work that wasn't yours to pay for, or waiting on Scottish Water for a fix that was on your side of the boundary all along. Request a CCTV drain survey online and we'll tell you plainly where the problem sits and what to do next. We cover blocked drains across Dundee and into north-east Fife, including Newport-on-Tay at the southern end of the Tay Road Bridge and Tayport further east along the Fife shore.