Development commenced under general consent is liable to pay CIL. 'General consent' includes permitted development rights granted under the The Town and Country Planning (General Permitted Development) (England) Order 2015 (as amended).
If you intend to commence development under general consent you must submit a Notice of Chargeable Development (Form 5 - Notice of chargeable development) to the local planning authority before you commence this development.
The only exception to this requirement to submit a Notice of Chargeable Development is if the development in question is less than 100 square metres of net additional 'gross internal area'. If the development meets this requirement a Notice of Chargeable Development does not have to be submitted before the commencement of development.
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