What is the 3 metre rule in the Party Wall Act?
The 3 Metre Rule in the Party Wall Act requires a building owner to notify neighbours if excavating within three meters of their property and going deeper than their foundations. This rule protects neighbouring structures and ensures proper legal procedures are followed to prevent disputes.
Understanding the 3 Metre Rule in the Party Wall Act: What You Need to Know
The 3 Metre Rule in the Party Wall Act refers to the requirement that applies when a building owner plans to excavate within three meters of a neighbouring property and the work could affect the stability of the adjoining owner’s foundations. Under this rule, if the proposed excavation work will go deeper than the foundation of the neighbouring property, the building owner must serve a party wall notice to the adjoining owner.
This notice informs the neighbour of the intended excavation and provides them with the opportunity to consent, request modifications, or appoint a surveyor to assess the potential impact of the work.
This rule is crucial in protecting the structural integrity of nearby properties, especially in densely populated areas like London where buildings are often very close together. If the neighbour does not consent to the excavation, a Party Wall Award may be necessary to establish the terms under which the work can proceed safely, ensuring that any potential damage is addressed and appropriate protections are in place.
The 3 Metre Rule helps to prevent disputes and provides a legal framework for resolving issues that may arise from close-proximity construction.
You are undertaking building works
- Check whether the Party Wall etc Act 1996 applies to your project
- Talk to your neighbours early, before serving Notice about your work. Keeping your Adjoining Owners (neighbours) informed
- Make sure your Notice is served properly, or else it will be invalid
- Serve Notice with plenty of time
- Don’t be tempted to start work until you have an agreement / Party Wall Award in place.
Received a Party Wall Notice? - We can help
- Most Adjoining Owners worry that their property will be damaged by the building works.
- Our role is to try and ensure that this does not happen by looking in detail at the proposals and designs and arranging proper working methods.
- Adjoining Owners are entitled to have their surveyor’s reasonable fees paid by the Building Owner.
- The fees must be both reasonable and justifiable.
Benefits of Hiring a Party Wall Surveyor
Engaging with a Party Wall Surveyor allows you to:
- Prevent delays getting agreements in place
- Receive expert advice
- Prevent legal disputes
- Record the condition of neighbours’ property prior to the works – preventing claims for damage

















