Planning appeal decision
17 Brookbridge Lane, Datchworth, Knebworth, SG3 6SU
Planning appeal 3285683 at 17 Brookbridge Lane, Datchworth, Knebworth, SG3 6SU (East Hertfordshire District Council) was dismissed on 12 October 2022 by Inspector Courtney T, by written representations. The main issue, as the Inspector framed it: Whether the proposed development would be inappropriate development in the Green Belt for the purposes of the National Planning Policy Framework and development plan policy.
Single storey rear/side extension to a detached dwelling
- Authority
- East Hertfordshire District Council
- Appeal type
- householder · Householder (HAS)
- Procedure
- Written Representations
- Development
- residential · Householder developments
- Inspector
- Courtney T
- Postcode
- SG3 6SU
Main issues, as the Inspector framed them
- Whether the proposed development would be inappropriate development in the Green Belt for the purposes of the National Planning Policy Framework and development plan policy
- The effect of the proposal on the openness of the Green Belt
- If the development would be inappropriate, whether the harm to the Green Belt by way of inappropriateness and any other harm would be clearly outweighed by other considerations so as to amount to the very special circumstances necessary to justify it
What decided it
The cumulative 266% increase in floorspace over the original building constitutes disproportionate development that would be inappropriate in the Green Belt, and no very special circumstances exist to justify it.
What the Inspector cited
- Development plan policies
- Policy GBR1Policy VILL2Policy HOU11Policy DES4
- National Planning Policy Framework
- Paragraph 149
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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