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57 Lillieshall Road London Lambeth SW4 0LW

25/03571/FULFull Planning PermissionRefused
Full

Refused on 12 January 2026

Council decision: Refuse PermissionDelegated (officer decision)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

Replacement of existing dormer windows to the rear roof slope with a new dormer window.

Received
17 November 2025
Decision level
Delegated (officer decision)
Public comments
1
Ward
Clapham Town
  1. Received17 Nov
  2. Validated17 Nov
  3. Consult.12 Dec
  4. Target12 Jan
  5. Decided12 Jan

Decided in 56 days (council typically 56)

About this application

This is a full planning application for a dormer extension at 57 Lillieshall Road London Lambeth SW4 0LW. Lambeth has handled 398 applications of this type. This one was decided in 56 days. The site is in the Clapham conservation area. There are no previous applications recorded at this address. In the past year there have been 209 applications across Clapham Town. We hold 2,293 applications in total for the SW4 postcode area.

70% of full applications at London Borough of Lambeth 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.See what's approved near your address

Why it was refused

  1. The proposed box dormer extension, by reason of its excessive scale and form, would result in an incongruous and overly dominant addition to the building and terrace. The extension would fail to appear clearly subordinate to the host property and would result in less than substantial harm to the character and appearance of the host property, subject terrace, and wider Clapham Conservation Area and no public benefits have been identified to outweigh the harm. The proposal would be contrary to Policies Q5, Q8, Q11 and Q22 of the Lambeth London planning@lambeth.gov.uk SW2 9QQ Local Plan 2021, the Lambeth Design Guide 2023, and the NPPF (2024).

From the council's decision notice.

Application details

Postcode
SW4 0LW
Application type
Full Planning Permission
Scale / size
Small

Planning application dates

Date validated
17 November 2025
Consultation expiry
22 December 2025
Consultation end
12 December 2025
Neighbour consultation end
12 December 2025
Target decision date
12 January 2026

Applicant and agent

Agent address
Atherstone House Elms Lane West Wittering PO20 8LW United Kingdom

Planning decision

Case officer
Senan Seaton Kelly
Statutory period
56 days

Publicity

Advertisement expiry
19 December 2025
Site notice end
22 December 2025

Additional information

Documents
19
Constraints
2

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Conservation area: Clapham
  • Tree Preservation Order: Ref 213Protected tree on or next to this site
  • Flood zone 1: Low probability (rivers and sea)
Also checked, none recorded (22)

flood storage areas, listed buildings, Article 4 directions, 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.

Source: Lambeth

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

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