Blocked drain in Northamptonshire: are you or Anglian Water responsible?

TL;DR

A drain that serves only your property, up to your boundary, is normally yours to maintain and clear. A drain shared by more than one property, or the section running from your boundary to the public sewer, is normally Anglian Water’s responsibility, following the 2011 private sewer transfer. If you’re not sure which side of that line your blockage sits on, a CCTV drain survey settles it — you can send us a quick enquiry to arrange one.

Anglian Water and the 2011 private sewer transfer

Anglian Water is the statutory sewerage undertaker for Northamptonshire, including Northampton (NN1–NN7) and the surrounding towns, with a legal duty to maintain the public sewer network. Before 2011, a lot of shared drains and the lateral pipes connecting individual properties to the main sewer sat with the property owners themselves — often without anyone realising until something went wrong. The 2011 private sewer transfer changed that: most shared drains, and the section of pipe running from a property’s boundary to the public sewer, moved to the water company. In practice, that means the pipe running solely within your own land is still yours, but the moment it joins a shared run or crosses your boundary to reach the sewer, responsibility usually shifts to Anglian Water.

How to tell whose drain it is

Start with who’s affected. If it’s only your sinks, toilets or shower that are slow or gurgling, and neighbours report nothing unusual, the blockage is most likely in your own private drain. If neighbouring properties are having the same problem at the same time — slow drainage, smells, or backing up — that points to a shared drain or the public sewer beyond your boundary. Location is a useful second clue: symptoms close to your own fixtures, or a fault visible in your garden’s inspection chamber, tend to mean private pipework; a fault appearing at an external manhole near the boundary, or at the point your pipe meets the street, is more likely to have transferred to Anglian Water. These are useful pointers rather than certainties — the only way to know for sure is to see inside the pipe.

What to do in each case

If everything points to a private-drain issue, the next step is getting it diagnosed and cleared by a plumber — most jobs like this get a fixed quote after a short assessment, agreed before any work starts. If it looks like a shared or public-sewer problem instead, report it directly to Anglian Water; they’ll investigate, and where the fault sits on their network, they carry out the repair. Either way, if you’re genuinely unsure which applies, a CCTV drain survey is the most reliable way to find out rather than guessing and potentially calling the wrong party first.

Why a CCTV survey settles the question

A CCTV drain survey feeds a small camera into the drain to record the condition of the pipe from the inside, with every defect graded against the WRc MSCC5 standard used across the UK drainage industry. The written report includes a drain location map marking exactly where each defect sits relative to your property boundary — which is what actually tells you whether a problem falls on the private side or the Anglian Water side, rather than relying on guesswork from the symptoms alone. Because it’s an objective record rather than an opinion, it’s also useful evidence if there’s ever a dispute with a neighbour or a query from Anglian Water about where a fault lies. You can arrange a CCTV drain survey and get a fixed quote through our online enquiry form before anything is booked in.

If you’re still not sure

This guide is deliberately general — it explains how responsibility usually splits, not a determination for your specific property, which is exactly why a survey exists. If you’re anywhere in Northampton or the surrounding Northamptonshire towns, our blocked drains service and our Northampton coverage both start from the same first step: find out where the fault actually is before deciding who to call.

Frequently Asked Questions

Is a blocked drain always my responsibility?

Not always. If the drain serves only your property and the blockage sits within your boundary, it usually is. If it’s a shared drain, or the section between your boundary and the public sewer, responsibility normally sits with Anglian Water following the 2011 transfer — a survey confirms which applies to you.

Who fixes a shared drain?

A shared drain — one serving more than one property — is normally Anglian Water’s responsibility as the statutory sewerage undertaker for the area, rather than any one household’s. If you’re not certain a drain is shared, a CCTV survey can confirm it.

What does the 2011 private sewer transfer actually mean?

It’s the point at which most shared drains and lateral drains — the pipe running from a property’s boundary to the public sewer — moved from private ownership to the water company. Pipework entirely within a single property’s boundary, like the run under your kitchen sink, stayed with the owner.

Is reporting a blocked public sewer to Anglian Water free?

Yes — reporting a suspected public-sewer problem to Anglian Water costs nothing, and if their investigation confirms the fault is on their network, they arrange the repair. If it turns out to be on your private drain instead, they’ll tell you so you can arrange that separately.

How long does a CCTV drain survey take?

Most domestic surveys take an hour or two on site, depending on how many runs need inspecting and how accessible the drains are. We agree access and timing with you when you book, and the written report and drain map follow shortly after.