Who Is Responsible for Water Damage Between Flats? 

Water damage between flats is one of the most common disputes in shared buildings, and responsibility isn’t always obvious. The answer depends on where the damage originated, what caused it, and what your lease says. Here’s how to work it out.

How responsibility for water damage between flats is determined

The first question is always: where did the water come from? Common causes include:

• Leaking pipes within a flat
• Faulty appliances such as washing machines or dishwashers
• Overflowing baths, showers, or sinks
• Damage to shared or communal pipework
• Roof or structural leaks that allow water in from above

If the source is within your neighbour’s flat, your neighbour is generally responsible, particularly if the leak resulted from negligence, such as leaving a tap running or failing to fix a known appliance fault. That said, proving negligence can be difficult without clear evidence.

If the source is a communal pipe or shared system, responsibility typically falls on the freeholder or managing agent, as maintenance of communal infrastructure is usually their obligation under the lease.

If the cause is unclear, a plumber or building surveyor can identify the source and provide a written report, which is essential if the matter becomes disputed.

Step 1: Find the source

Before anything else, identify where the water is coming from.

• Look for damp patches, water stains, or ceiling bulges in your flat
• Check your own pipes, appliances, and taps
• Speak to the neighbour above or adjacent to you to see whether they’re aware of any issue
• Contact your landlord or managing agent if you suspect communal pipes or shared areas are involved

Getting this confirmed quickly limits further damage and clarifies who needs to act. Our guide on escape of water covers how water damage from leaks is typically treated by insurers.

Step 2: Check your lease or tenancy agreement

Your lease or tenancy agreement sets out who is responsible for what in your building. Key things to look for:

If you’re a leaseholder: Your lease will define what falls within your demise, which is the area you own and are responsible for, and what is the freeholder’s responsibility. Communal pipes, the roof, and structural elements are usually the freeholder’s remit. Internal pipes within your flat are typically yours.

If you’re a tenant: Your landlord is generally responsible for structural repairs and the maintenance of plumbing and heating systems. Damage caused by your own appliances or negligence remains your responsibility.

If the damage is to communal areas: The freeholder or managing agent is typically responsible for maintaining and repairing shared systems and spaces. Our guide on building insurance for flats explains how building insurance is typically arranged in shared buildings.

Step 3: Report and document the damage

As soon as you discover water damage, document it thoroughly.

• Photograph and video all affected areas, including ceilings, walls, floors, and damaged belongings
• Note when you first noticed the damage and how it has progressed
• Report it to your landlord, managing agent, or freeholder in writing
• Keep copies of all correspondence

Our guide on how to document belongings for insurance explains what to capture and how to do it in a way that supports a claim.

How insurance covers water damage between flats

Several types of insurance may be relevant depending on the situation:

Contents insurance covers your personal belongings, furniture, and electronics damaged by water from a covered event such as a burst pipe or escape of water. This applies regardless of whether the leak came from your flat or a neighbour’s. With Lemonade’s contents insurance, escape of water is a covered event.

Building insurance covers structural damage to the property itself, including ceilings, walls, and floors. In most blocks of flats, the freeholder arranges buildings insurance for the whole building and recovers the cost through the service charge. Individual leaseholders don’t usually need their own buildings policy.

Your neighbour’s liability cover may apply if their negligence caused the damage. Some contents insurance policies include personal liability cover, which can pay out for damage accidentally caused to others. Check whether your neighbour has this in place.

Resolving disputes

If responsibility is disputed, here’s how to approach it:

1. Get a professional assessment. A plumber or building surveyor can confirm the source of the leak and provide a written report. This is often the most effective way to resolve disagreement about where the damage originated.
2. Communicate in writing. Whether you’re dealing with a neighbour, landlord, or managing agent, put everything in writing and keep copies. This protects you if the matter escalates.
3. Contact your insurer. Let your insurer know about the damage and the dispute. They may be able to assist in establishing liability or handling a claim directly.
4. Consider mediation. If the dispute isn’t resolving, a professional mediator can help both parties reach an agreement without going to court. The Civil Mediation Council has a directory of accredited mediators.
5. Seek legal advice if needed. For significant damage where liability is genuinely disputed and mediation hasn’t worked, legal advice may be necessary.

Our guide on what to do if your neighbour refuses to pay for damage covers this scenario in more detail.

How to reduce the risk of water damage in your flat?

A few practical habits go a long way:

• Check appliances like washing machines and dishwashers regularly for signs of wear on hoses and connections
• Report leaks, dripping taps, or damp patches to your landlord or managing agent promptly
• Keep drains clear. Our guide on how to prevent blocked drains at home covers the basics
• Don’t leave baths, showers, or sinks running unattended

Before we go

Water damage between flats is stressful, but working through it methodically makes it significantly more manageable. Identify the source, check your lease, document everything, and contact the relevant party in writing as soon as possible. If there’s a dispute about responsibility, a professional assessment is usually the quickest way to resolve it.

With Lemonade’s contents insurance, water damage from a covered event is included from day one. 

Water damage responsibility FAQs