The 6 Metre Rule under the Party Wall Act refers to excavation work that occurs within six meters of a neighbouring property, particularly when the work could affect the foundation of that property. If the proposed excavation will extend deeper than the foundation of the adjacent building, even if it is within six meters, the building owner must serve a party wall notice to the neighbouring owner.

This rule applies to deep foundations or significant digging, such as for basement conversions or other substantial groundwork. The notice gives the adjoining owner the opportunity to either consent to or challenge the excavation, ensuring both parties are informed and protected.

This rule is essential for preventing potential structural damage to nearby properties caused by deep excavation. If the neighbour disputes the excavation or does not respond to the notice, a party wall surveyor may need to be appointed to assess the impact of the work and establish a Party Wall Award.

This award will set out the terms for the excavation, ensuring safety measures are in place and any risks to the neighbouring property are properly managed. The 6 Metre Rule is crucial for maintaining the structural integrity of buildings in densely populated areas where properties are closely situated.