Planning appeal decision
53 St. Peter's Street, London, N1 8JR
Planning appeal 3307833 at 53 St. Peter's Street, London, N1 8JR (London Borough of Islington) was dismissed on 27 February 2023 by Inspector Wright A, 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/Colebrooke Row Conservation Area.
mansard roof extension and raising of existing party parapet walls and chimneys
- Authority
- London Borough of Islington
- Appeal type
- householder · Householder (HAS)
- Procedure
- Written Representations
- Development
- residential · Householder developments
- Inspector
- Wright A
- Postcode
- N1 8JR
Main issues, as the Inspector framed them
- Whether the proposed development would preserve or enhance the character or appearance of the Duncan Terrace/Colebrooke Row Conservation Area
What decided it
The mansard roof extension would be highly prominent in longer views and would further harm the unity and consistency of the terrace row without any public benefits to justify the less than substantial harm to the conservation area.
What the Inspector cited
- Development plan policies
- Policy HC1 of The London PlanPolicy CS8 of Islington's Core StrategyPolicy CS9 of Islington's Core StrategyPolicy DM2.1 of Islington's Local Plan: Development Management PoliciesPolicy DM2.3 of Islington's Local Plan: Development Management PoliciesPolicy D1 of the London PlanPolicy D4 of the London Plan
- National Planning Policy Framework
- Paragraph 202
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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With an account
What an account adds to this decision


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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.
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