Does Home Insurance Cover Underground Pipes and Blockages?

If you’ve noticed a damp patch on your driveway, a drop in water pressure, or an unexplained rise in your water bill, a damaged underground pipe could be the cause. Whether your buildings insurance covers it depends on what caused the damage, where the pipe is, and what your policy includes. Here’s a clear breakdown.

What underground pipe damage is covered?

Most standard buildings insurance policies cover sudden and accidental damage to underground pipes within your property boundary. If a pipe bursts unexpectedly and causes water damage or creates a sinkhole in your garden, you can typically claim for:

• The cost of repairing or replacing the damaged pipe
• The cost of accessing the pipe, including excavation of driveways or garden areas
• Water damage caused by the leak

Most policies include an escape of water clause, which covers damage caused by water leaking from underground pipes. Some policies also extend to drainage systems and heating pipes connected to your home, though the specifics vary. Check your policy documents to confirm what’s included.

What is not covered?

Several common scenarios are excluded from standard buildings insurance when it comes to underground pipes:

• Wear and tear and corrosion: Gradual deterioration of pipes through age or rust is not an insured event. Insurers treat this as a maintenance issue.
• Poor installation or workmanship: If the damage stems from pipes that were incorrectly fitted, your insurer is unlikely to pay out.
• Gradual damage: Issues that develop slowly over time, rather than from a sudden event, are typically excluded.
• Misuse: Blockages caused by flushing unsuitable items down the drain, such as wet wipes or sanitary products, are generally not covered.
• Tree root damage: This is often excluded from standard policies, though some may cover it as part of an accidental damage add-on.

If a plumber or surveyor determines that the damage falls into any of these categories, your claim may be declined.

Who is responsible for pipes outside your property?

Pipes that run beyond your property boundary are not covered by your buildings insurance. Responsibility for those depends on the type of pipe:

• Water supply pipes: The section of pipe from the boundary of your property to your home is usually your responsibility. The pipe from the water main to your boundary is the water company’s responsibility.
• Public sewers: These are managed by your local water company. If there’s a blockage or collapse in a public sewer, contact your water provider rather than your insurer.
• Shared pipes or drains: If a pipe serves more than one property, responsibility may be shared or may fall to the water company depending on when it was adopted.

If you’re unsure who is responsible for a specific pipe, Water UK can help you identify the relevant water company for your area.

Grey areas and additional cover

Tree root damage

Tree root damage to underground pipes is one of the more common grey areas. Some policies exclude it entirely. Others may cover it under an accidental damage add-on if the damage was sudden and unexpected rather than the result of gradual root growth over time. Check your policy wording carefully and contact your insurer if you’re unsure how they’d treat a specific claim.

Trace and access cover

Trace and access cover is a useful clause that covers the cost of locating a hidden leak or damaged pipe, even if the repair itself isn’t covered or no fault is ultimately found. Without it, the cost of excavating a driveway or garden to find the problem can be significant. Check whether your policy includes it, or whether it’s available as an add-on.

Blocked drains

Blocked drains are generally not covered under standard building insurance unless the blockage has caused sudden, significant damage to the property. Routine drain clearing is considered maintenance.

Home emergency cover

Home emergency cover is an optional add-on that covers the immediate cost of emergency call-outs for things like burst pipes, blocked drains, and sudden plumbing failures. It’s worth considering if you’re in an older property or one with ageing pipework. Our guide on plumbing and drainage cover covers what’s typically included.

What to do if you have an underground pipe issue?

1. Turn off the water at the stopcock if you suspect a burst pipe.
2. Document the damage with photos and video before any work begins.
3. Get a professional assessment from a plumber or drainage specialist to identify the cause and location of the problem.
4. Contact your insurer to confirm whether the damage is covered before authorising any permanent repairs.
5. Check whether the pipe is within your boundary. If it’s outside, contact your water company rather than your insurer.
6. Keep all documentation, including reports, quotes, receipts, and correspondence, to support any claim you make. Our guide on making an insurance claim explains the full process.

Before we go

Buildings insurance covers underground pipes for sudden, accidental damage within your property boundary, but not for wear and tear, gradual deterioration, or pipes outside your boundary. If you’re concerned about blockages, tree root damage, or the cost of locating a hidden leak, it’s worth checking whether your policy includes trace and access cover or whether home emergency cover is worth adding.

With Lemonade’s buildings insurance, sudden water damage from insured events is covered from day one. 

Underground pipe damage FAQs