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Planning appeal decision

Dismissed1 October 20253369806

12 The Avenue, Harrow, HA3 7DF

Planning appeal 3369806 at 12 The Avenue, Harrow, HA3 7DF (London Borough of Harrow) was dismissed on 1 October 2025 by Inspector Allan J, by written representations. The main issue, as the Inspector framed it: The effect of the proposed single-storey side-to-rear extension upon the living conditions at 10 and 14 The Avenue, with particular regard to visual impact.

the erection of a single-storey side-to-rear extension with attached garage; alterations and extension to roof to form end gable; rear dormer; two rooflights in front roof slope; window in end gable; external alterations (demolition of attached garage)

Authority
London Borough of Harrow
Appeal type
householder · Householder (HAS)
Procedure
Written Representations
Development
residential · Householder developments
Inspector
Allan J
Postcode
HA3 7DF

Main issues, as the Inspector framed them

  • The effect of the proposed single-storey side-to-rear extension upon the living conditions at 10 and 14 The Avenue, with particular regard to visual impact

What decided it

The visual dominance and overbearing impact of the proposed extension upon the living conditions and amenity space of the neighbouring property at No 10 The Avenue, which would be unacceptable in a suburban residential setting.

What the Inspector cited

Development plan policies
Policy D3 of The London Plan (2021)Policy CS1.B of the Harrow Core Strategy (2012)Policy DM1 of the Council's Development Management Policies (2013)

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

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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.