®Planning appeal decision
Warbank House, Westerham Road, Keston, BR2 6AG
Planning appeal 6000453 at Warbank House, Westerham Road, Keston, BR2 6AG (London Borough of Bromley) was dismissed on 17 December 2025 by Inspector Cahalane R, by written representations. The main issue, as the Inspector framed it: whether the proposed development is inappropriate development in the Green Belt having regard to the National Planning Policy Framework and relevant development plan policies, including the effect on the openness and purposes of the Green Belt.
elevational alterations and enlargement of lower ground floor and construction of two storey front extension, two storey side extension (incorporating raised terrace at rear with lower ground and ground floor space) with single storey side/rear extension and alterations to roof profile/design, with front, side and rear dormers and conversion of roof space to habitable accommodation. Enlargement of existing rear terrace
- Authority
- London Borough of Bromley
- Appeal type
- householder · Householder (HAS)
- Procedure
- Written Representations
- Development
- residential · Householder developments
- Inspector
- Cahalane R
- Postcode
- BR2 6AG
Main issues, as the Inspector framed them
- whether the proposed development is inappropriate development in the Green Belt having regard to the National Planning Policy Framework and relevant development plan policies, including the effect on the openness and purposes of the Green Belt
- the effect on the character and appearance of the host dwelling and the surrounding area
- whether any harm by reason of inappropriateness, and any other harm, would be clearly outweighed by other considerations so as to amount to very special circumstances required to justify the appeal scheme
What decided it
The proposal results in a disproportionate size increase of approximately 61-86% in floor area, substantially exceeding the 10% threshold permitted under Policy 51, and thereby causes harm to the openness of the Green Belt that is not clearly outweighed by other considerations.
What the Inspector cited
- Development plan policies
- Policy 49Policy 51Policy 6Policy 37Policy G2 of the London PlanPolicy D3 of the London Plan
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
Town Planner Pro holds this letter. The Appeals plan opens it and every other letter we hold, all of them searchable, with the main issues and what decided each case picked out. We do not show letters on the free site because they carry people’s names and addresses.
With an account
What an account adds to this decision
More decisions in London Borough of Bromley
The authority’s record since 2016 · every decision in 2025
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- Dismissed30 April 20266005662336 Main Road, Biggin Hill, Westerham, Kent, TN16 2HL
- Allowed17 April 20266000833Land Between 127 & 129 Leaves Green Road, Keston, BR2 6DG
- Notice varied and upheld31 March 20263343405Land to the Rear of 50 to 54 Cudham Lane, Cudham, TN14 7QY
- Dismissed18 March 20263375346Downe Court, Cudham Road, Downe, Orpington, Bromley, BR6 7LF
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.