Planning appeal decision
The Hollow, Hyde Lane, Nash Mills, Hertfordshire, HP3 8RY
Planning appeal 3337385 at The Hollow, Hyde Lane, Nash Mills, Hertfordshire, HP3 8RY (Three Rivers District Council) was dismissed on 8 August 2024 by Inspector Walker 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 (2023) and any relevant development plan policies.
alterations to roof form of existing garage including removal of dormer windows and alterations to roof, rooftiles; alterations to fenestration
- Authority
- Three Rivers District Council
- Appeal type
- householder · Householder (HAS)
- Procedure
- Written Representations
- Development
- other · Householder developments
- Inspector
- Walker R
- Postcode
- HP3 8RY
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 (2023) and any relevant development plan policies
- The effect of the proposed development on the openness of the Green Belt
- The effect of the proposed development on the character and appearance of the surrounding area
- If it is inappropriate development, whether the harm by reason of inappropriateness, and any other harm, is clearly outweighed by other considerations, so as to amount to the very special circumstances necessary to justify the proposed development
What decided it
The combination of the substantial 172% increase in floorspace, increased massing, and resulting harm to character and appearance, together with the inappropriate development status in the Green Belt, were not outweighed by any other considerations amounting to very special circumstances.
What the Inspector cited
- Development plan policies
- Policy CP11Policy DM2Policy CP1Policy CP12Policy DM1Appendix 2
- National Planning Policy Framework
- Paragraph 154Paragraph 142
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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