TL;DR The CON29DW drainage and water search your conveyancer orders tells you who is legally responsible for each length of pipe serving a Chelmsford property. It does not tell you what condition that pipe is in, and it rarely makes clear how many other households are connected to the same run before it leaves the boundary. Since the 2011 transfer of private sewers and lateral drains, Anglian Water owns far more of the pipework around Chelmsford homes than most buyers expect — but the sections that remain yours are exactly the ones nobody has looked inside. A camera survey is what fills that gap, and it needs to happen before exchange, not after. Request a fast, fixed-price quote online to get one booked.
What the CON29DW Search Actually Covers The drainage and water enquiry is a standard part of conveyancing and it is genuinely useful. Working from the sewerage undertaker's records, it typically confirms: - whether the property is connected to the public foul sewer and to the public surface water sewer - whether a public sewer is recorded as running within the property's boundary - where the mapped public sewers sit in relation to the building - whether the property is on the register of properties at risk of internal flooding due to overloaded sewers - how the property is billed for water and wastewater
Every one of those answers comes from a map and a database. Nobody has put a camera in the ground at your prospective address, and no part of the search is a condition report.
Public Sewer, Lateral Drain or Private Drain? Three terms decide who pays when something goes wrong, and buyers routinely mix them up:
- **Private drain** — pipework inside the boundary serving only your property. This is yours to maintain and repair.
- **Lateral drain** — the length of your drain that continues beyond the boundary until it reaches the public sewer. Since the 2011 transfer, this is normally the sewerage undertaker's responsibility, which for Chelmsford means Anglian Water.
- **Public sewer** — pipework serving more than one property. Most formerly private shared sewers connected to the public system transferred into water company ownership in 2011, even where they run under private gardens.
The practical consequence is that a defect in one section can be someone else's bill and a defect three metres further along can be entirely yours. Knowing which is which before you commit is worth more than a general reassurance that "the drains are on the mains".
Why Shared Runs Are So Common in Older Chelmsford Streets The Victorian and Edwardian terraces near the city centre and through Moulsham and Springfield were frequently built with a single drain run serving a whole row of houses before it reached the sewer in the street. That arrangement still exists under a great many Chelmsford gardens today. It matters for two reasons: a blockage in a shared run can affect several households at once, and clearing or repairing it can involve a conversation with neighbours and the sewerage undertaker rather than a simple instruction from you.
Sharing is not a defect and it is not a reason to pull out of a purchase. It is simply something you want established as fact, from the mapped records and from a camera, rather than discovered the first time the run backs up.
New Estates in North-East Chelmsford Beaulieu Park and Channels sit in the north-east Chelmsford growth area, with more recent development also going in around Great Baddow to the south-east of the city. Newer estates generally give each property its own connection, which avoids the shared-run question altogether, but they raise a different one: on a recently built estate the drainage may still be within the maintenance period of a Section 104 adoption agreement, meaning the developer remains responsible for the estate sewers until adoption formally completes.
It is worth establishing who currently maintains the estate's drainage and whether adoption has gone through, because that determines who you would be dealing with if something needed putting right in your first few years of ownership.
Extensions, Build-Overs and the Three-Metre Rule Building regulations require the sewerage undertaker to be consulted where work is built over, or close to, a public sewer, and a build-over or build-near agreement is normally needed before that work goes ahead. Plenty of Chelmsford properties have been extended over the decades, and older extensions were not always handled that carefully.
If a previous owner has built over a shared run without an agreement in place, the practical problems land on whoever owns the house next. It is a straightforward thing to ask about during conveyancing, and a survey that shows exactly where the run passes under the building gives the question a factual answer instead of a guess.
What a Camera Adds That the Search Cannot A pre-purchase CCTV drain survey answers the two things a search leaves open. First, it shows the physical state and the fall of the pipe, which no map can. Second, it shows where the run actually goes and what joins it, including whether your prospective property picks up a neighbour's flow before the boundary, or discharges into a run you had assumed was entirely your own.
Mapped records are not always a reliable guide to what was originally built, and they are rarely updated when a run has been re-routed around an extension or a conservatory. On older Chelmsford stock in particular, the camera and the search are complementary: one tells you the legal position, the other tells you the physical one.
FAQs **Does the CON29DW search tell me whether the drains are damaged?** No. It reports connection, mapped sewer locations, flooding-risk records and charging. Pipe condition is outside its scope entirely, which is why a CCTV drain survey is a separate exercise.
**Who is responsible for clearing a blocked shared drain?** It depends where the blockage sits. A shared run that transferred into public ownership in 2011 is generally the sewerage undertaker's responsibility, while the private section serving only your property remains yours. Establishing the boundary between the two is exactly what the search and a survey together let you do.
**Can I find out how many properties share my drain before I buy?** The mapped records give you part of the picture, and a camera survey through the inspection chambers usually shows the rest, because you can see where other flows join the run.
**Is any of this relevant on a new-build estate?** Yes, though the questions change. Shared runs are less likely, but adoption status, installation quality and the fall of newly laid pipe are all worth confirming.
**When should this be done?** Before exchange, alongside your other searches. After exchange you still get the information, but you no longer have any room to act on it.
