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Planning appeal decision

Dismissed21 March 20253359723

140 High Street, Harlington, Hayes, UB3 5DW

Planning appeal 3359723 at 140 High Street, Harlington, Hayes, UB3 5DW (London Borough of Hillingdon) was dismissed on 21 March 2025 by Inspector Sims B, by written representations. The main issue, as the Inspector framed it: The effect the proposed extension would have on the character and appearance of the host dwelling and its semi-detached neighbour in the context of the surrounding Harlington Village Conservation Area.

the erection of a single-storey, part-side and part-rear extension

Authority
London Borough of Hillingdon
Appeal type
householder · Householder (HAS)
Procedure
Written Representations
Development
residential · Householder developments
Inspector
Sims B
Postcode
UB3 5DW

Main issues, as the Inspector framed them

  • The effect the proposed extension would have on the character and appearance of the host dwelling and its semi-detached neighbour in the context of the surrounding Harlington Village Conservation Area

What decided it

The cumulative visual imbalance created by the proposed extension to the semi-detached pair of dwellings within the Conservation Area, when weighed against insufficient public benefits, resulted in less than substantial harm that could not be justified.

What the Inspector cited

Development plan policies
BE1DMHB11-12D3HE1DMHB4DMHD1
National Planning Policy Framework
Paragraph 215

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 applied

The decision letter

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More decisions in London Borough of Hillingdon

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

  1. Dismissed27 October 20266015310
    4 Albany Close, Ickenham, UB10 8QW
  2. Dismissed27 October 20266009856
    18-20 Wilmar Close, Hayes, UB4 8ET
  3. Dismissed21 October 20266011782
    25 Stirling Road, Hayes, UB3 3AH
  4. Dismissed19 October 20266011268
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  5. Allowed6 October 20266013858
    88 Stormount Drive, Hayes, UB3 1RH

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.

In the app this decision sits on the map beside every appeal around it, with its letter to read and the main issues, policies and judgments cited picked out.