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Hi all, hoping someone may be able to provide some insight into what roof enlargements you can make under Permitted Development Class B.
I am particularly interested in condition B.2(b)(ii) which states:
"other than in the case of an enlargement which joins the original roof to the roof of a rear or side extension, no part of the enlargement extends beyond the outside face of any external wall of the original dwellinghouse"
Does this prevent any additions being made (e.g. a dormer) above a previous extension, therefore roof enlargements can only be made above the original dwelling?
The technical guidance document provides the following information:
"The enlarged part of the roof must not extend beyond the outer face of any wall of the original house if it is to qualify as permitted development, unless it joins the original roof to the roof of a rear or side extension. An interpretative provision at paragraph B.4 of Class B clarifies that for these purposes any roof tiles, guttering, fascias, barge boards or other minor roof details which overhang the outer face of the wall should not to be considered part of the roof enlargement.
The enlarged part of the roof may join the original roof to the roof of a rear or side extension (generally referred to as an ‘L-shaped dormer’ on a main roof and ‘outrigger’ or ‘back addition’ roof), whether the part of the house being extended forms part of the original house or is an enlargement, or the shape or level of the pitch of the roofs are different in relation to each other."
I'm struggling to fully appreciate what is allowed based on above, i.e. could a hip to gable be undertaken above an existing side extension if it joins onto the original roof?
Any thoughts or examples would be appreciated.
Thank you.
I am particularly interested in condition B.2(b)(ii) which states:
"other than in the case of an enlargement which joins the original roof to the roof of a rear or side extension, no part of the enlargement extends beyond the outside face of any external wall of the original dwellinghouse"
Does this prevent any additions being made (e.g. a dormer) above a previous extension, therefore roof enlargements can only be made above the original dwelling?
The technical guidance document provides the following information:
"The enlarged part of the roof must not extend beyond the outer face of any wall of the original house if it is to qualify as permitted development, unless it joins the original roof to the roof of a rear or side extension. An interpretative provision at paragraph B.4 of Class B clarifies that for these purposes any roof tiles, guttering, fascias, barge boards or other minor roof details which overhang the outer face of the wall should not to be considered part of the roof enlargement.
The enlarged part of the roof may join the original roof to the roof of a rear or side extension (generally referred to as an ‘L-shaped dormer’ on a main roof and ‘outrigger’ or ‘back addition’ roof), whether the part of the house being extended forms part of the original house or is an enlargement, or the shape or level of the pitch of the roofs are different in relation to each other."
I'm struggling to fully appreciate what is allowed based on above, i.e. could a hip to gable be undertaken above an existing side extension if it joins onto the original roof?
Any thoughts or examples would be appreciated.
Thank you.