Checklists · Drainage
Drainage Responsibility Questions Checklist
Help an owner assemble the observations, paperwork and boundary detail needed before putting a responsibility question to the relevant authority or drainage undertaker, without settling any part of the answer in advance.
7 sections · 42 planning prompts · educational owner-side preparation
https://www.builddesignhub.com/checklists/drainage-and-site-discussion/drainage-responsibility-questions · Build Design Hub — educational planning resource. Requirements vary by project and location.
Scope
What this checklist covers
The preparation ground these prompts walk through.
- Narrowing a responsibility question down to a single identified feature
- What the paperwork received with the property tends to mention about drainage
- Surface signs that a run may serve more than one property
- Where the plot ends and what sits beyond the boundary
- Who the question belongs with, and the order to approach them in
- Keeping a dated record of enquiries made and answers received
Audience
Who this checklist is for
- Owners who have never established who looks after the drainage they rely on
- People planning work near a run whose ownership has never been settled
- Owners of properties where a chamber appears to serve more than one house
- Anyone told that a drainage matter is not theirs to deal with
Timing
When to use it
- Assembling what you can observe before asking a responsibility question
- Listing the paperwork that may mention drains, ditches or shared runs
- Writing down which parts of the system you have never been able to trace
- Preparing questions for the relevant authority or drainage undertaker
- Keeping a dated record of who you asked and what you were told
Limits
When it is not sufficient
This is general planning preparation. These situations need a qualified professional, and often the relevant authority.
- Establishing who is responsible for any drain, chamber, ditch or watercourse
- Deciding whether anything may be connected to an existing drain
- Settling a disagreement with a neighbour or with anybody else
- Standing in for what the relevant authority or drainage undertaker tells you
The checklist
Work through the sections
Tick the boxes on paper or on screen — nothing is stored, so print the page if you want to keep your marks.
1.Pinning down the question you actually need answered
Responsibility questions get asked in a vague form and answered just as vaguely. Narrowing what you are asking about is most of the work.
Write down the single feature the question is about, such as one chamber, gully, pipe end or ditch, rather than asking about the drainage as a whole.
Enquiries about a whole system tend to come back unanswered, while a question about one identified feature can usually be dealt with.
Note what prompted the question, such as a blockage, standing water, a proposed alteration or something a neighbour mentioned in passing.
The reason behind an enquiry often changes who should be answering it, and it is among the first things you will be asked.
Record whether the feature appears to carry foul water, surface water or something you genuinely cannot tell, and say so plainly if you do not know.
The two are frequently dealt with under different arrangements, and a guess at this point sends an enquiry to the wrong place.
Whether a run carries foul or surface water is for a qualified drainage professional to establish, not something to conclude from appearances.
Distinguish whether you are asking about keeping something clear, repairing it, or altering and adding to it, since these are rarely the same question.
Owners often ask one of these and receive an answer to another, then act on it without noticing the substitution.
Write down what you currently believe about who looks after the feature, and mark it clearly on the page as an assumption rather than a fact.
Unwritten assumptions survive whole projects untouched, while written ones tend to get checked by somebody sooner or later.
Note what you would do differently depending on the answer, so the enquiry has a purpose you can explain to whoever receives it.
An enquiry with a stated purpose usually attracts a more specific reply than an open question about a property.
2.What the property paperwork already mentions
Drainage turns up in property paperwork in scattered and easily missed places. Gathering those mentions is an owner task; reading meaning into them is not.
Go back through the paperwork received when the property was bought and note every mention of drains, sewers, ditches, culverts or shared services.
These references are usually spread across several documents, and almost nobody reads them again once the purchase is done.
Note any plan among that paperwork showing a run, a chamber or a strip of land marked differently from the rest of the plot.
A marked strip on an older plan is frequently the only surviving clue that something crosses the site.
Collect any correspondence about drainage from previous owners, builders or neighbours that came with the property or has arrived since.
Old letters often record an arrangement that everybody has since forgotten and nobody has replaced with anything.
List drainage work carried out since you took the property on, who did it and what you were told about the system at the time.
Notes of what a contractor once said do not establish responsibility; that belongs with the relevant authority or drainage undertaker.
Write down what appears to be missing, such as a plan referred to but never supplied, and record the gap rather than filling it with a guess.
A stated gap is genuinely useful to whoever answers your enquiry, whereas an invented assumption quietly misdirects them.
Keep your notes to what a document actually says, and avoid compressing it into a conclusion about who is responsible for what.
Interpreting property documents is a matter for a suitably qualified adviser, and drainage responsibility for the relevant authority or drainage undertaker.
4.Where the plot ends and what sits beyond it
Many responsibility questions turn on what happens at the edge of the plot. What you can honestly record there is limited, and that limit is worth stating.
Write down where you understand the boundary to run and what physically marks it, noting any place where the two do not obviously agree.
The visible fence line and the recorded boundary are not always the same thing, and drainage questions often sit exactly on that difference.
Note every gully, grating, ditch, channel or pipe end within the edge strip of the plot, on either side of whatever marks the boundary.
Edge features are the ones nobody has thought about for a long time, and they are usually central to the enquiry.
Record whether water appears to leave your ground towards a neighbour, arrive from theirs, or both in different places or different weather.
Direction of travel is the observation most often assumed rather than watched, and it changes the whole nature of the enquiry.
Note where your ground meets a road, footway or verge, and any grating or channel in that area, without treating it as yours or as anybody else's.
Anything in or adjoining the highway is a matter for the local authority; do not work on it or draw conclusions about it.
Record whether an open ditch, stream or culverted channel runs along or near the boundary, and whether it holds water constantly or only after rain.
Responsibility for a watercourse, and for anything discharging to it, is for the relevant authority or drainage undertaker to explain.
State plainly which parts of the picture you cannot observe from your own ground, rather than completing the route from imagination.
An honest gap in your record is far more useful to whoever answers than a plausible sounding guess that has to be unpicked.
5.Putting the question to the right people in the right order
Responsibility enquiries bounce between organisations when they arrive in the wrong form. A little sequencing saves a great deal of repetition.
List the organisations that may hold part of the answer, including the local authority and the drainage undertaker for your area, and confirm locally who covers what.
Which organisation deals with which kind of drainage varies by area, so the list itself is something to confirm rather than assume.
Ask each what records they hold for the area and what you need to supply for them to look, rather than asking them to settle the whole question at once.
Record enquiries are usually a defined process, and framing it that way tends to produce a faster and more useful reply.
Send one clearly identified question at a time, with the feature described and located, rather than a general request about the property.
Bundled enquiries tend to be answered on the easiest point and then closed, leaving the part you cared about untouched.
Offer your sketch, photographs and dated observations with the enquiry, and ask whether that format suits how they work.
Enquiries with a legible location record attached are far less likely to come back asking for clarification.
Ask a qualified drainage professional which parts of your question they can answer and which must go elsewhere, before assuming either can cover both.
A drainage professional can describe what a system does; who is responsible for it is for the relevant authority or drainage undertaker.
Decide what, if anything, you will do while an enquiry is outstanding, and avoid altering, clearing or connecting anything in the interim.
Alterations and connections belong with qualified professionals, and what has to be agreed beforehand is for the authority to confirm locally.
6.Assumptions about responsibility that go wrong
Most of the trouble here comes from something everybody believed and nobody checked. Write each of these down as a question instead of a belief.
Note whether you have assumed a run is yours simply because it crosses your ground, and mark that belief as unchecked.
Position and responsibility are separate matters, and almost everybody treats them as the same thing at first.
Note anything you believe because a contractor or a previous owner said it once, and record who said it and when they said it.
Recollection of what somebody once said does not establish responsibility; take the point to the relevant authority or drainage undertaker.
Avoid assuming that a shared run means a shared arrangement for looking after it, and write the question down instead of answering it.
How a shared run is dealt with in practice varies, and it is exactly the thing worth having settled before a problem arrives.
Note whether a clearing once arranged by you or a neighbour has quietly become an assumed obligation for whoever arranged it.
A single act of goodwill is regularly remembered by everybody afterwards as a settled arrangement that nobody actually made.
Never assume that an existing pipe or chamber may be connected to, extended or diverted because something is already joined to it.
Whether anything may be connected to a drain is for the relevant authority or drainage undertaker, with the work itself for qualified professionals.
Record whether anything has been altered, built over or added since the arrangement you are relying on was last described to anybody.
Alterations quietly outdate whatever people were told previously, and nobody thinks to revisit the description afterwards.
7.Recording who you asked and what came back
The value of this exercise is a file somebody else could follow without you. Keep it factual, keep it dated and keep it in one place.
Keep a dated log of every enquiry, who it went to, in what form it was sent and what reference you were given for it.
References are the only reliable way to pick an enquiry back up when it stalls or is passed to somebody else.
Write down the answer as it was actually given, and note separately anything you have inferred from it.
An inference drawn from a partial answer is not a finding; put it back to the relevant authority or drainage undertaker to confirm.
Note which part of your question was not addressed, and decide whether to put that part again or to put it somewhere else.
Partly answered enquiries are usually closed by the person who asked rather than by the person who answered.
Keep your sketch, photographs and observation notes filed with the correspondence so the whole record sits in one place.
Separated evidence loses its meaning quickly, and drainage questions have a habit of resurfacing long afterwards.
Decide who else should hold a copy, such as a designer, a builder or a future owner, and record what was passed on and when.
Responsibility questions repeat with every project on a site, and a kept file saves starting the whole exercise again.
Before any work near a run is planned, reread the file and note what remains unresolved rather than quietly proceeding around it.
Work near or over a drain is for qualified professionals to plan, and unresolved responsibility should go to the authority first.
Preparation
Documents and information to gather
Having these to hand usually makes the first conversation shorter and more useful.
- The paperwork received when the property was bought, including any plans supplied with it
- A sketch of the plot showing boundaries and every drainage feature you can see
- Dated photographs of covers, gullies and outlets, especially those near a boundary
- Notes of drainage work carried out since you took the property on, and by whom
- Correspondence about drains, ditches or shared runs from previous owners or neighbours
- A dated log of enquiries made and of the replies received against each one
Records
Decisions to record before work begins
Write these down in your own words, with the date, so everyone is working from the same version.
- Which single feature your responsibility question is actually about
- Whether you are asking about clearing, about repair, or about alteration
- Which organisations you will approach, and in what order you will approach them
- What you will and will not do while an enquiry remains outstanding
- Who else receives a copy of the enquiry record and who keeps the original
Professional review
Questions to discuss with qualified professionals
Bring these to the relevant qualified professional, supplier or authority. Requirements vary by project and location.
- Which parts of my question can you answer, and which must go to an authority?
- What would you need from me to describe this feature accurately in an enquiry?
- Does what is visible here suggest the run may serve more than one property?
- Who holds drainage records for this area, and how are they normally requested?
- What should I avoid doing while responsibility is still unsettled?
- If this turns out to be shared, what usually has to be agreed and with whom?
- What would you want recorded before anything near this run is planned?
- Is there anything visible at this feature that changes who I should be asking?
Blind spots
Commonly overlooked items
- A chamber cover sitting almost exactly on the boundary and never mentioned by anybody
- A plan referred to in the purchase paperwork that was never actually supplied
- Clearing arranged once as a favour and remembered ever since as an obligation
- The grating out in the verge, assumed to belong to whoever happens to be nearest
- Symptoms appearing at several properties on the same occasion and never compared
- An answer that addressed only part of the question, closed by the person who asked
- Alterations made since the arrangement everybody still describes was last accurate
What this checklist does not do
- Nothing here establishes who is responsible for any drain, chamber, ditch or watercourse; that is for the relevant authority or drainage undertaker.
- Do not lift covers, enter chambers or clear any part of a system while assembling an enquiry.
- Whether anything may be connected to, diverted from or built over a drain sits entirely outside this checklist.
- Where property documents are involved, their meaning is a matter for a suitably qualified adviser rather than for you.
More preparation
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Inspiration
Related Ideas Library pages
Design directions to explore once the preparation is done.
Go deeper
Related Build Design Hub guides
Explanatory planning guidance behind the decisions on this page.
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