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Planning appeal decision

Allowed3 July 20253364909

175 Lyham Road, London, SW2 5PY

Planning appeal 3364909 at 175 Lyham Road, London, SW2 5PY (London Borough of Lambeth) was allowed on 3 July 2025 by Inspector Allan J, by written representations. The main issue, as the Inspector framed it: The effect of the proposal upon the character and appearance of the appeal property and wider street scene.

the erection of a mansard roof extension to provide second floor accommodation

Authority
London Borough of Lambeth
Appeal type
householder · Householder (HAS)
Procedure
Written Representations
Development
residential · Householder developments
Inspector
Allan J
Postcode
SW2 5PY

Main issues, as the Inspector framed them

  • The effect of the proposal upon the character and appearance of the appeal property and wider street scene

What decided it

The proposed mansard roof extension, as an appropriately subordinate and sympathetic change that retains the architectural integrity of the dwelling and responds positively to the built form and varied character of the wider street scene, would not result in significant harmful impact and displays the quality of design required by the development plan policies.

What the Inspector cited

Development plan policies
Policy Q5Policy Q8Policy Q11

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 Lambeth

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

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  3. Dismissed20 October 20266015253
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  5. Dismissed20 October 20266014083
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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.