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Eastcote, HA5 2SL

78805/APP/2025/2547Householder planning permissionRefused
Householder

Refused on 15 December 2025

1 reason for refusal

Approximate site (title boundary)
Boundary © HM Land Registry, © Ordnance Survey · details

This information is subject to Crown copyright and database rights 2026 and is reproduced with the permission of HM Land Registry. The polygons (including the associated geometry, namely x, y co-ordinates) are subject to Crown copyright and database rights 2026 Ordnance Survey AC0000851063. Conditions of use.

Proposal

Erection of a part single storey, part two storey front, side and rear extension, conversion of roof to habitable use with rear dormer and 3 x roof lights

Submitted
7 October 2025
  1. Received7 Oct
  2. Validated
  3. Consult.
  4. Target
  5. Decided15 Dec

Decided in 69 days (council typically 56)

About this application

This is a planning application for a dormer extension at Eastcote, HA5 2SL. Hillingdon has handled 1,272 applications of this type. This one was decided in 69 days, 13 days longer than Hillingdon's typical decision time. The site is in the Eastcote Park Estate conservation area. There have been 3 other applications at this address. In the past year there have been 140 applications across EASTCOTE 2022. We hold 1,739 applications in total for the HA5 postcode area.

89% of householder planning permission applications at London Borough of Hillingdon were approved. Across all application types, the council typically decides in about 8 weeks (median).

Based on decided applications received in the last 3 years.Planning something similar? See what gets approved on your street

Why it was refused

  1. The proposed two-storey side/rear extension, in combination with the enlarged rear dormer, by reason of their excessive bulk, poor relationship with the existing roof form, and visually awkward appearance, would result in a cumulative form of development that fails to respect the proportions and architectural character of the host dwelling. The proposal would appear discordant and overly dominant, causing harm to the character and appearance of the Eastcote Conservation Area. The development therefore fails to preserve or enhance the significance of the Conservation Area, contrary to Policy BE1 of the Hillingdon Local Plan: Part One - Strategic Policies (2012), Policies DMHB4, DMHB11, DMHB 12 and DMHD 1 of the Hillingdon Local Plan: Part Two- Development Management Policies (2020) Policy D3 of the London Plan (2021).and Chapter 12 of the National PDECHHODB (ODB) 78805/APP/2025/2547 Planning Policy Framework (2024).

From the council's decision notice.

Application details

Postcode
HA5 2SL
Application type
Householder planning permission

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Conservation area: Eastcote Park EstatePart of the site
  • Article 4 direction: Residential extensions
  • Flood zone 1: Low probability (rivers and sea)

Possibly incomplete for this council: tree preservation orders.

Also checked, none recorded (21)

flood storage areas, listed buildings, green belt, scheduled monuments, World Heritage Sites, World Heritage Site buffer zones, registered parks and gardens, registered battlefields, Heritage at Risk entries, nutrient neutrality catchments, national parks, National Landscapes, SSSIs, Special Areas of Conservation, Special Protection Areas, Ramsar sites, ancient woodland, national nature reserves, local nature reserves, heritage coasts and brownfield registers.

A guide only, from official open data; it is not a planning search. Flood zones cover rivers and sea, not surface water.

Data © Crown copyright and others · sources and licences

Contains public sector information from planning.data.gov.uk (MHCLG and local planning authorities), licensed under the Open Government Licence v3.0. © Crown copyright and database right 2026.

© Historic England 2026. Contains Ordnance Survey data © Crown copyright and database right 2026. The Historic England GIS Data contained in this material was obtained on 2026-11-03. The most publicly available up to date Historic England GIS Data can be obtained from HistoricEngland.org.uk.

© Natural England copyright. Contains Ordnance Survey data © Crown copyright and database right 2026.

© Environment Agency copyright and/or database right 2026. All rights reserved. Flood Map for Planning, Open Government Licence v3.0.

Contains Ordnance Survey data © Crown copyright and database right 2026.

Source: Office for National Statistics licensed under the Open Government Licence v.3.0. Contains OS data © Crown copyright and database right 2026.

Associated applications

  1. 2025
    14 Oct

    Erection of 3no. outbuildings to rear garden (Application for a Certificate of Lawful Development for a…

    ApprovedLawful development: Proposed useFiled alongside78805/APP/2025/2548
  2. 2025
    7 Oct

    Erection of a part single storey, part two storey front, side and rear extension, conversion of roof to…

    This applicationRefusedHouseholder78805/APP/2025/2547

Source: Hillingdon

Contains public sector information from the Planning London Datahub, licensed under the Open Government Licence v3.0.

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