Old Farm , Harthall Lane, Kings Langley, WD4 8JW

Planning appeal 3368051 at Old Farm , Harthall Lane, Kings Langley, WD4 8JW (Three Rivers District Council) was dismissed on 2 October 2025 by Inspector Bowden N, by written representations. The main issue, as the Inspector framed it: Whether the proposal would be inappropriate development in the Green Belt having regard to the National Planning Policy Framework and relevant development plan policies including the effect of the proposal on the openness and purposes of the Green Belt.

Two storey extension, new swimming pool and patio area, new single storey detached annexe, conversion and extension of existing detached garage into office, gym, study area and pool room with shower, new 1.8 metre high entrance gates, new hard surface access point in rear garden to provide access to new detached single storey chicken coop

Authority: Three Rivers District Council
Appeal type: householder · Householder (HAS)
Procedure: Written Representations
Development: residential · Householder developments
Inspector: Bowden N
Postcode: WD4 8JW

Main issues, as the Inspector framed them

Whether the proposal would be inappropriate development in the Green Belt having regard to the National Planning Policy Framework and relevant development plan policies including the effect of the proposal on the openness and purposes of the Green Belt
The effect of the proposed development on the character and appearance of the existing host dwelling and the area including whether the existing dwelling may be regarded as a Non-Designated Heritage Asset
The effect of the proposed development on trees
Whether any harm by reason of inappropriateness, and any other harm, would be clearly outweighed by other considerations, so as to amount to the very special circumstances required to justify the proposal

What decided it

The proposed development represents disproportionate additions to the original dwelling that fail to preserve the openness of the Green Belt and would cause significant harm to the Non-Designated Heritage Asset, with no very special circumstances identified to outweigh these harms.

What the Inspector cited

Development plan policies: Policy CP11 of the Three Rivers Core Strategy 2011Policy CP12 of the Three Rivers Core Strategy 2011Policy CP1 of the Three Rivers Core Strategy 2011Policy DM2 of the Three Rivers Development Management Policies Local Development Document 2013Policy DM1 of the Three Rivers Development Management Policies Local Development Document 2013Policy DM3 of the Three Rivers Development Management Policies Local Development Document 2013Policy DM6 of the Three Rivers Development Management Policies Local Development Document 2013
National Planning Policy Framework: Paragraph 11Paragraph 142Paragraph 153Paragraph 154Paragraph 216Paragraph 56

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.

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The decision letter

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More decisions in Three Rivers

The authority’s record since 2016 · every decision in 2025

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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.