Planning appeal decision
21 Thornhill Road, Hillingdon, Ickenham, UB10 8SG
Planning appeal 3349115 at 21 Thornhill Road, Hillingdon, Ickenham, UB10 8SG (London Borough of Hillingdon) was dismissed on 4 November 2024 by Inspector Barnes D, by written representations. The main issue, as the Inspector framed it: The effects of the proposed development on the character and appearance of the streetscene.
the erection of a first floor extension to create a 2 storey dwelling house and associated alterations
- Authority
- London Borough of Hillingdon
- Appeal type
- householder · Householder (HAS)
- Procedure
- Written Representations
- Development
- residential · Householder developments
- Inspector
- Barnes D
- Postcode
- UB10 8SG
Main issues, as the Inspector framed them
- The effects of the proposed development on the character and appearance of the streetscene
- The effects of the proposed development on the living conditions of 17 Thornhill Road
What decided it
The unacceptable harm to the living conditions and outlook of the occupiers of 17 Thornhill Road caused by the visual dominance of the proposed 2-storey flank wall outweighed the acceptable character and appearance impacts.
What the Inspector cited
- Development plan policies
- Policy DMHD 1Policy DMHB 12Policy DMHB 11Policy BE 1Policy B1
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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What an account adds to this decision


More decisions in London Borough of Hillingdon
The authority’s record since 2016 · every decision in 2024
- Dismissed27 October 202660153104 Albany Close, Ickenham, UB10 8QW
- Dismissed27 October 2026600985618-20 Wilmar Close, Hayes, UB4 8ET
- Dismissed21 October 2026601178225 Stirling Road, Hayes, UB3 3AH
- Dismissed19 October 20266011268364 Victoria Road, Ruislip, HA4 0ET
- Allowed6 October 2026601385888 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.
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