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Planning appeal decision

Dismissed7 July 20253358143

21 Raleigh Street, London, N1 8NP

Planning appeal 3358143 at 21 Raleigh Street, London, N1 8NP (London Borough of Islington) was dismissed on 7 July 2025 by Inspector Jones M, by written representations. The main issue, as the Inspector framed it: Whether the proposed development would preserve or enhance the character or appearance of the Duncan Terrace/Colebrook Row Conservation Area.

a roof extension

Authority
London Borough of Islington
Appeal type
householder · Householder (HAS)
Procedure
Written Representations
Development
residential · Householder developments
Inspector
Jones M
Postcode
N1 8NP

Main issues, as the Inspector framed them

  • Whether the proposed development would preserve or enhance the character or appearance of the Duncan Terrace/Colebrook Row Conservation Area

What decided it

The proposed mansard roof extension would be clearly visible from the public realm and would disrupt the architectural consistency and uniform roofline profiles of the terrace, causing harm to the character and appearance of the conservation area that outweighs the private and minimal public benefits.

What the Inspector cited

Development plan policies
PLAN1DH1DH2HC1
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 Islington

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

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  3. Allowed24 September 20266005904
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  5. Notice upheld23 September 20263364241
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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.

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.