Neighbour's rainwater running onto your property: what can you do?

You only notice it when it rains: next door's downpipe ends on your paving, the gutter on their shed has no outlet, or since their new extension or patio all the water runs your way. After every shower a puddle sits against your shed and the wall gets wet. For your neighbours there is nothing wrong; their side is dry. In this article, you’ll find out what you can ask for and how to raise it calmly.

Why a neighbour's rainwater goes unnoticed for so long

Water always runs to the lowest point, and sometimes that point is just over the boundary. A downpipe that used to empty onto a flower bed suddenly discharges onto a patio after building work. New paving with a slightly different fall sends the water next door instead of to the street.

Common effects include:

• Puddles and mud. A patio or path that stays wet for hours after each shower.

• Damp in a shed or wall. Water standing against brickwork soaks in.

• Dead plants. Borders that sit under water for too long.

Raise it kindly

Start from the assumption that your neighbours don't know. From their garden everything looks normal, and in dry weather there is nothing to see. Describe what you see on your side, say honestly that you are not sure of the cause and ask to look together:

"During yesterday's rain the water from your downpipe ran across our patio as far as the shed. I'm sure you can't see that from your side. Shall we have a look together where it comes from during the next shower?"

Invite your neighbours to come and look while it is raining. Don't tamper with their gutter or downpipe yourself and don't go onto their land without permission.

What can you ask for and agree?

The fix is often small and cheap. Think of:

• Rerouting the downpipe. A shoe or extension into their own garden or towards the street.

• A water butt. With an overflow that discharges onto their own ground.

• A gutter with an outlet. Along the extension or shed, connected to a drain or soakaway.

• Adjusting the fall. Relaying a few slabs so the water runs away from your side.

• ree who arranges it, when and who pays. If a measure also solves something for you, you can offer to chip in. Then check together during the next shower whether it works.

What do the rules say?

In England and Wales there is no general law saying every roof must have a gutter. New building work such as an extension must, however, have adequate rainwater drainage under the Building Regulations (Part H), normally to a soakaway, a watercourse or a sewer rather than onto next door. Your council's building control team can check this. Water that runs naturally off higher ground is generally something the lower owner has to accept.

It is different when a neighbour collects or channels water, for example through a downpipe, a gutter or new paving, so that it ends up on your property. That can be a private nuisance, and a court can order it to stop and award damages. The deeds of older houses sometimes contain a right to drain roof water onto the neighbouring plot, so check them first. Scotland has its own rules. This article is not legal advice.

Keep a record

For each shower, note when and how long it rained, where the water came from, where it ran to and how big the puddle was. Take dated photos and a short video from your own property. Don't write down a cause you are not sure of. That way you can later show what is happening and whether a change has helped.

In practice

Who is responsible for water is not always obvious, and councils have a limited role. A homeowner in Derbyshire whose property flooded with water running off a neighbour's fields asked his council who was responsible. The council took years to make its position clear. The Local Government and Social Care Ombudsman found it at fault for poor communication, noted that landowners have primary responsibility for drainage on their own land, and had the council apologise and pay £100 (source: LGSCO decision 23 006 019). The lesson: a practical agreement between neighbours is usually quicker than waiting for an authority to sort it out.

If you can't sort it out together

• Send a second, clear letter. Refer to your earlier conversation and mention a few observations from your log.

• Use a community mediation service. A neutral mediator helps you reach a practical agreement together.

• Do your neighbours rent? Ask their landlord or housing association to look at the gutter or downpipe.

• Is there damage? Talk to your insurer before trying to recover costs from anyone.

Help with the first message

With the CalmNotes pack on rainwater from a neighbour's property you get editable sample messages to raise a downpipe, gutter or puddle calmly, follow-up messages if nothing changes and a log to record what you see in every shower. More tips on the page rainwater from a neighbour's property.

Choose a suitable next step

Free incident diary — Record incidents, contact and agreements.

Prepare your records and request for help — Organise your information and prepare a request for help.

Find support — Find out who may be able to help with your situation.