Glossary · UK
What is Party Wall Agreement?
A written agreement, governed by the Party Wall etc. Act 1996, that sets out rights and protections when building work affects a shared wall or boundary.
Full Definition
A party wall agreement is a formal arrangement under the Party Wall etc. Act 1996 (England and Wales) that applies when you carry out certain building work near or on a wall, structure or boundary shared with a neighbour. Common triggers include cutting into a shared wall, building on the line of junction, or excavating close to a neighbour's foundations. Before starting, you must serve a party wall notice on affected neighbours, usually one to two months in advance depending on the work. If they consent in writing, no further steps are needed; if they dissent or do not respond, a dispute arises and surveyors are appointed to produce a binding party wall award. This document records the agreed work, a schedule of condition, and how any damage will be handled. It protects both parties, reduces disputes, and clarifies liability. Costs are usually borne by the person doing the work. Failing to follow the process can lead to injunctions or claims.