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343 Clapham Road London SW9 9BS

25/02745/FULFull Planning PermissionRefused
Full

Refused on 12 November 2025

Council decision: Refuse PermissionDelegated (officer decision)2 reasons 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 rear elevation and partial side elevation windows with uPVC windows (Retrospective). Replacement of existing front and side elevation windows with double glazed timber windows.

Received
1 September 2025
Decision level
Delegated (officer decision)
Ward
Clapham East
Agent
Hildrey Studio
  1. Received1 Sep
  2. Validated11 Sep
  3. Consult.8 Oct
  4. Target6 Nov
  5. Decided12 Nov

Decided in 62 days (council typically 56)

About this application

This is a full planning application for window replacement at 343 Clapham Road London SW9 9BS. Lambeth has handled 398 applications of this type. This one was decided in 72 days, 2 weeks longer than Lambeth's typical decision time. There are no previous applications recorded at this address. In the past year there have been 93 applications across Clapham East. We hold 1,813 applications in total for the SW9 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 replacement uPVC windows by reason of their design, proportions and material including their heavy detailing, visible trick vents and non-integrated glazing bars, would fail to respond positively to the character and appearance of the host building, resulting in a low degree of less than substantial harm to the significance of the locally listed building and wider Clapham Road Conservation Area. No public benefits have London planning@lambeth.gov.uk SW2 9QQ been identified to justify the aforementioned harm. As a result, the replacement windows would thereby fail to preserve and enhance the character and appearance of the Clapham Road Conservation Area and the significance of the locally listed building, contrary to the aims and objectives of the NPPF (2025), Policies HC1 of the London Plan (2021), Q5, Q8, Q11, Q22 Q23 of the Lambeth Local Plan (2021) and the guidance contained in the Lambeth Design Guide SPD (2023).
  2. In the absence of accurate existing and proposed drawings and section drawings and details for the replacement windows, officers are not able to fully assess the visual impact of the development. It is therefore considered that it has not been demonstrated that the proposal will respond positively to the character and appearance of the locally listed building and the wider Clapham Road Conservation Area. The proposal is therefore contrary to the aims and objectives of the NPPF (2025), Policies HC1 of the London Plan (2021), Q5, Q8, Q11, Q22 and Q23 of the Lambeth Local Plan (2021) and the guidance contained in the Lambeth Design Guide SPD (2023).

From the council's decision notice.

Application details

Postcode
SW9 9BS
Application type
Full Planning Permission
Scale / size
Small

Planning application dates

Date validated
11 September 2025
Consultation expiry
8 October 2025
Consultation end
8 October 2025
Neighbour consultation end
8 October 2025
Target decision date
6 November 2025

Applicant and agent

Agent
Hildrey Studio
Agent address
23 Canham Road London SE25 6RZ

Planning decision

Statutory period
56 days

Publicity

Advertisement expiry
3 October 2025
Site notice end
3 October 2025

Additional information

Comments
0
Documents
46
Constraints
8

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Conservation area: Clapham Road
  • Flood zone 1: Low probability (rivers and sea)
Also checked, none recorded (23)

flood storage areas, listed buildings, Article 4 directions, tree preservation orders, 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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