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Planning appeal decision

Dismissed13 April 20266005472

1 Mossy Vale, Maidenhead, SL6 7RX

Planning appeal 6005472 at 1 Mossy Vale, Maidenhead, SL6 7RX (Royal Borough of Windsor and Maidenhead) was dismissed on 13 April 2026 by Inspector Lawrence E, by written representations. The main issue, as the Inspector framed it: The effect of the proposal on the character and appearance of the host dwelling and the surrounding area.

described on the application form as the erection of a side crown roof dormer extension with the addition of rooflights to the front, rear and side roof slopes

Authority
Royal Borough of Windsor and Maidenhead
Appeal type
householder · Householder (HAS)
Procedure
Written Representations
Development
residential · Householder developments
Inspector
Lawrence E
Postcode
SL6 7RX

Main issues, as the Inspector framed them

  • The effect of the proposal on the character and appearance of the host dwelling and the surrounding area

What decided it

The proposed side dormer extension would materially and unacceptably harm the character and appearance of the host dwelling and its surroundings through its poor proportions, excessive height relative to the ridge line, and failure to respect the existing roof form.

What the Inspector cited

Development plan policies
Policy QP3 of the Borough Local Plan 2013 – 2033Borough Wide Design Guide 2020 Principle 10.5
National Planning Policy Framework
Paragraph 135

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 Royal Borough of Windsor and Maidenhead

The authority’s record since 2016 · every decision in 2026

  1. Allowed27 October 20266007126
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  2. Allowed26 October 20266014376
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  3. Dismissed21 October 20266009694
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    59 to 61 and Land to the Rear of 59 to 61 St Leonard's Road, Windsor, SL4 3BX
  5. Notice upheld24 September 20263353235
    Sunnyside Stanwell Road, Horton, Slough, SL3 9PE

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.