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Planning appeal decision

Quashed On Legal Grounds20 May 20253334726

20 Thornsbeach Road, London, SE6 1DX

Planning appeal 3334726 at 20 Thornsbeach Road, London, SE6 1DX (London Borough of Lewisham) was decided (quashed on legal grounds) on 20 May 2025 by Inspector Jones R, by written representations. The main issue, as the Inspector framed it: Whether the replacement UPVC windows materially affect the external appearance of the building as a whole, such that they constitute development requiring planning permission.

without planning permission, the unauthorised installation of UPVC windows

Authority
London Borough of Lewisham
Appeal type
enforcement · Enforcement Notice
Procedure
Written Representations
Development
other · Householder developments
Inspector
Jones R
Postcode
SE6 1DX

Main issues, as the Inspector framed them

  • Whether the replacement UPVC windows materially affect the external appearance of the building as a whole, such that they constitute development requiring planning permission

What decided it

The replacement windows, when assessed against the Burroughs Day principles, do not materially affect the appearance of the building as a whole because the front elevation (the most visible) shows only minor visual differences from the public realm, and the rear and side elevations are not seen in combination with the front or read as part of the building's overall composition.

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More decisions in London Borough of Lewisham

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

  1. Quashed On Legal Grounds29 July 20263350448
    Bestfood Supermarket, 30 Loampit Hill, London, SE13 7SW
  2. Notice varied and upheld19 March 20263290410
    Land and Buildings to the Rear of 243-265 Bromley Road, London, SE6 2RA
  3. Quashed On Legal Grounds11 March 20263352755
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  4. Notice varied and upheld26 February 20263342757
    11 Dunkery Road, London, SE9 4HX
  5. Notice varied and upheld16 February 20263355454
    51 Sydenham Road, London, SE26 5EX

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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