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18 Clapham Common North Side London SW4 0RQ

25/03073/FULFull Planning PermissionRefused
Full

Refused on 26 November 2025

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

Erection of a lower ground floor single storey, rear infill extension and creation of an enlarged patio; replacement and refurbishment of windows to the front and rear elevations to match existing; waterproofing and insulation of existing roof; erection of a new rear garden outbuilding with basement to replace existing outbuilding; and other associated works. (Please note: The reference number for this application for Full Planning Permission is 25/03073/FUL, but there is also an associated Listed Building Consent application related to these works with reference number: 25/03074/LB)

Received
30 September 2025
Decision level
Delegated (officer decision)
Ward
Clapham Town
Agent
Delve Architects Ltd
  1. Received30 Sep
  2. Validated30 Sep
  3. Consult.
  4. Target25 Nov
  5. Decided26 Nov

Decided in 57 days (council typically 56)

About this application

This is a full planning application for an outbuilding at 18 Clapham Common North Side London SW4 0RQ. Lambeth has handled 398 applications of this type. This one was decided in 57 days. The site is in the Clapham conservation area, with 2 listed buildings nearby. There have been 3 other applications 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 rear infill extension would result in the loss of the surviving historic rear elevation and flank London planning@lambeth.gov.uk SW2 9QQ wall of the return, which together contribute to the building's significance, and would harm the original floor plan and spatial character of the rear room. Furthermore, the extension is overly dominant and incongruous, causing less than substantial harm to the listed building and its setting, including the historic garden features such as the brick retaining wall and steps. This harm is not outweighed by public benefits and is thereby contrary to paragraph 208 of the NPPF, Lambeth Local Plan Policies Q2, Q5, Q11, Q20, Q22, and Q27 and London Plan Policy HC1.

From the council's decision notice.

Application details

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

Planning application dates

Date validated
30 September 2025
Target decision date
25 November 2025

Applicant and agent

Agent
Delve Architects Ltd
Architect profile
DELVE ARCHITECTS LIMITED
Agent address
Unit 1.104, The Leather Market 11-13 Weston Street London SE1 3ER

Planning decision

Statutory period
56 days

Additional information

Comments
0
Documents
24
Constraints
4

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

Also checked, none recorded (21)

flood storage areas, 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.

Associated applications

  1. 2025
    30 Sep

    Erection of a lower ground floor single storey, rear infill extension and creation of an enlarged patio…

    This applicationRefusedListed building consent25/03073/FUL
  2. 2025
    30 Sep

    Erection of a lower ground floor single storey, rear infill extension and creation of an enlarged patio…

    RefusedListed building consentPart of25/03074/LB

Source: Lambeth

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

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