Planning appeal decision
4 Cornwall Mews South, London, SW7 4RZ
Planning appeal 3356853 at 4 Cornwall Mews South, London, SW7 4RZ (Royal Borough of Kensington and Chelsea) was allowed on 13 May 2025 by Inspector Wilson S, by written representations. The main issue, as the Inspector framed it: Whether the proposals would preserve or enhance the character or appearance of the Cornwall Conservation Area.
‘creation of mansard roof to form second floor, similar to that approved at 8 Cornwall Mews South under PP/22/01124. Other alterations to front and rear elevations similar to those previously approved at 4 Cornwall Mews South under PP/18/03382 and PP/21/04997.’
- Appeal type
- householder · Householder (HAS)
- Procedure
- Written Representations
- Development
- residential · Householder developments
- Inspector
- Wilson S
- Postcode
- SW7 4RZ
Main issues, as the Inspector framed them
- Whether the proposals would preserve or enhance the character or appearance of the Cornwall Conservation Area
- Its effect on the living conditions of neighbouring occupiers
What decided it
The substantial erosion of the roofscape's original character through existing developments meant the proposed mansard would not cause additional harm to the conservation area's character or appearance, and its setback design would not adversely affect neighbouring living conditions.
What the Inspector cited
- Development plan policies
- Policy CD1Policy CD2Policy CD3Policy CD9Policy CD12Policy CD15
How the Inspector dealt with each one is set out in the app, in order: the development plan, national policy, housing land supply, other considerations and the planning balance, beside the letter.
See how each was appliedThe decision letter
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With an account
What an account adds to this decision


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The main issues, what decided it, the planning balance and the policies and judgments listed as cited are read from the published letter by Town Planner Pro and are our summary, not the Inspector’s words; the letter itself is the record. Contains public sector information licensed under the Open Government Licence v3.0. Research, not advice.
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