Because you are attaching the extension to a 'side wall' (ie the red one in the image above) as well as the rear walls (your walls A & B), then the extension must meet the criteria for both a side extension and a rear extension.Even though the proposed extension is to the rear of the property? Im totally confused by this sorry
Fair point but it is worth clarifying that it depends what the "outrigger" is. It might not be original and is a small extension or conservatory.If any part of the extension is touching the red line then the width of the extension is limited to half the overall width of the house.
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