Last edited 05 Mar 2019

Building boundary definition

According to Approved Document B of the Building Regulations, a ‘boundary’ is ‘…the boundary of the land belonging to the building, or where the land abuts a road, railway, canal or river, the centre line of that road, railway, canal or river.

Relevant boundaries are boundaries which a wall faces, whether it is the actual boundary of the site, or a notional boundary.

Relevant boundary.jpg

An notional boundary is an assumed boundary between two buildings.

Notional boundary.jpg

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