A blockage on its own is usually not covered by home insurance, because clearing drains counts as routine maintenance. What most buildings policies do cover is accidental damage to the underground drains you are responsible for, such as a cracked, broken or collapsed pipe. Wear and tear, neglect and misuse (fat, wipes) are the common exclusions. A CCTV drain survey report is the evidence that usually decides the claim.
When water starts backing up and someone mentions what a drain repair can cost, the first question most homeowners in Cornwall and Devon ask is whether the insurance will pay. The honest answer is: sometimes, and it depends entirely on what has actually gone wrong underground. This guide explains where the line sits, what insurers look for, and how to give a claim its best chance.
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What home insurance usually covers
Most buildings insurance policies include cover for accidental damage to underground services. That phrase matters. It typically means the pipes, drains, tanks and cables that serve your home and that you are legally responsible for. If one of those drains is accidentally damaged, for example a pipe fractured by ground movement, crushed by a vehicle, or broken during garden work, the repair is the sort of loss the policy is designed to pay for.
In practice, the events that most often lead to a successful drain claim are:
- A collapsed or fractured pipe where the damage is sudden or accidental rather than the slow result of age.
- Damage caused by a one-off event, such as building work, heavy vehicles over a shallow drain run, or storm damage.
- Escape of water consequences, where a leaking or damaged drain has gone on to damage the building itself. The damage to your home is usually covered even where the pipe repair itself is argued over.
- Tree root damage, on some policies, where roots have broken into the pipe. Insurers treat this differently from one another, which is why evidence of exactly how the roots got in matters so much.
Cover levels, excesses and definitions vary a great deal between insurers, so none of this replaces reading your own policy wording. But the pattern is consistent: insurance responds to damage, not to blockages.
What it usually does not cover
The exclusions are where most drain claims fail, and they are worth knowing before you pick up the phone to your insurer.
| Common exclusion | What it means for your drains |
|---|---|
| Routine blockages and maintenance | A drain blocked by everyday use is treated as maintenance. Clearing it is your cost, the same as servicing a boiler. This is the single most common reason drain callouts are not claimable. |
| Wear and tear | A pipe that has simply reached the end of its life, with joints that have drifted apart or old pitch fibre that has deformed, is usually excluded as gradual deterioration. |
| Misuse | Blockages caused by fat, oil, wet wipes, nappies or anything else that should never have gone down the drain are generally excluded, and repeated misuse can undermine a later claim. |
| Gradually operating causes | Some policies exclude damage that happened slowly, which can catch tree root ingress and long-standing leaks. Other insurers are more generous. The wording decides. |
| Poor workmanship | Damage traced back to a badly installed or badly repaired drain is normally a matter for whoever did the work, not the insurer. |
There is a practical middle ground worth knowing about too. Even where the blockage itself is not covered, if clearing it reveals genuine damage, the repair of that damage may well be. Plenty of claims start life as a callout for a blocked drain and end as an insured repair for the drain repair the camera found underneath the blockage.
First check whose drain it is
Before insurance enters the picture at all, work out whether the faulty drain is even yours. Since 2011, most shared drains and the sections of pipe beyond your property boundary (called lateral drains) belong to the water company, which across our patch is South West Water. If the fault sits in a public sewer or lateral drain, the water company repairs it at no cost to you and no insurance claim is needed.
You are generally responsible for the private drains within your boundary that serve only your property. Those are the pipes your buildings insurance is concerned with. If you are not sure which side of the line the problem sits on, a drainage engineer can usually tell you within minutes of lifting a cover, and it is a far better first step than guessing.
Why a CCTV survey decides most claims
Insurers do not pay out on a hunch, and neither should you dig up a garden on one. What settles the question in almost every disputed drain claim is camera footage showing the actual condition of the pipe: where the damage is, what kind of damage it is, and whether it looks sudden or gradual.
A professional CCTV drain survey produces a recorded inspection with the position and nature of every defect logged, which is exactly the format insurers and loss adjusters expect to see. It tells them, and you, whether you are looking at a claimable fracture or an excluded build-up. If the survey is carried out as part of investigating an insured loss, many insurers will accept its cost within the claim, and some will ask for one before agreeing anything.
The survey also protects you from the opposite problem: paying an excess and losing a no-claims benefit for something that turns out to be a simple blockage a jetting visit would have cleared for far less.
How to make a drain claim, step by step
- Deal with any emergency first. If sewage is backing up into the house, stop using water, keep people away from the affected area, and get the blockage dealt with. Insurers do not expect you to leave your home flooding while you wait; they expect you to prevent further damage.
- Establish responsibility. Confirm the fault is in a private drain you own rather than a public sewer or lateral drain.
- Get the drain inspected on camera. The survey report is your evidence. Keep the footage, the written report and any photographs.
- Call your insurer before major work. Report the damage, quote the relevant section of your policy if you have found it, and ask whether they want to instruct their own inspection. Emergency work to stop damage is fine; do not authorise a full repair until they have responded, or you risk paying for work they would have covered done differently.
- Keep every receipt. Callout charges, the survey, temporary repairs and any costs of cleaning up water damage may all form part of the claim.
If the answer comes back that the problem is a blockage rather than damage, the fix is usually quicker and cheaper than a claim anyway. A straightforward drain unblocking visit clears most of them the same day, and if sewage is already where it should not be, our emergency drainage service covers Plymouth, south east Cornwall and south and west Devon.
Frequently asked questions
Does home insurance cover unblocking a drain?
Usually not. A simple blockage caused by everyday use, fat, wipes or a gradual build-up is normally treated as maintenance, which is the homeowner's responsibility. Insurance typically responds when the drain itself has been accidentally damaged, for example a cracked or collapsed pipe, rather than when it is merely blocked.
Is a collapsed drain covered by buildings insurance?
Often yes, if the collapse counts as accidental damage to underground services you are responsible for. Most buildings policies include cover for accidental damage to underground drains and pipes. Damage put down to wear and tear, poor installation or long-term neglect is commonly excluded, so the cause matters and the policy wording decides.
Are tree roots in drains covered by home insurance?
It depends on the policy. Some insurers treat root damage as accidental and pay for the repair, while others exclude gradually operating causes, which is how roots usually get in. A CCTV survey showing exactly where and how the roots entered gives the insurer the evidence to make that call, so get the drain inspected before assuming either way.
Will my insurer pay for a CCTV drain survey?
If the survey forms part of investigating an insured loss, many insurers will accept the cost within the claim, and some will instruct one themselves. If the survey finds only a blockage caused by misuse or a maintenance issue, you may have to cover it. Either way the survey report is the piece of evidence that decides most drain claims.
Do I need to tell South West Water instead of my insurer?
If the problem is in a public sewer or a lateral drain beyond your property boundary, it is South West Water's responsibility and no insurance claim is needed. Your policy only comes into it for the private drains within your boundary that serve just your home. A drainage engineer can tell you which side of the line the fault sits on.
Need the evidence for a drain claim?
We carry out recorded CCTV drain surveys and repairs across Plymouth, south east Cornwall and south and west Devon, with clear reports you can put straight in front of your insurer. Call for a fast, free quote.
Call DCI Drainage on 07418 000 420 Or email hello@dcidrainage.co.uk
