Why do basement extensions mostly require Party Wall Agreements?

Gt Louis Chartered Surveyors25 May, 2026Other

Thinking about extending your home downwards with a basement conversion? Basement extensions have become increasingly popular across London, particularly in areas where outdoor space is limited and moving to a bigger property simply isn't an option. But before the digging begins, there's an important legal step that catches many homeowners off guard: the Party Wall Act.