25 Andalus Road London SW9 9PQ

25/03427/FULFull Planning PermissionRefused

Full

Refused on 19 March 2026

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

Erection of single storey ground floor L-shaped rear extension and erection of rear mansard roof extension together with the raising of the ridge height, installation of 2 rooflights to the front elevation and doors to rear first floor to create Juliet balcony. Erection of rear outrigger extension and an amendment to the originally approved planning application 18/02281/FUL to raise the front eaves and parapet walls at roof level to facilitate a buildability issue with damaged brickwork during construction (Retrospective).

Received: 3 November 2025
Decision level: Delegated (officer decision)
Public comments: 2
Council: London Borough of Lambeth
Ward: Clapham East
Agent: Zap Architecture

ReceivedReceived3 Nov
ValidatedValidated28 Nov
Consult.Consultation3 Jan
TargetTarget Date23 Jan
DecidedDecided19 Mar

Decided in 111 days (council typically 56)

About this application

This is a full planning application for a rear extension at 25 Andalus Road London SW9 9PQ. Lambeth has handled 398 applications of this type. This one was decided in 136 days, 11 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

The raising of the height of the roof ridge, roof plane, eaves and associated parapet walls to the front of no. 25 Andalus Road has resulted in an incongruous and discordant form of development that is detrimental to the character and appearance of the host building and surrounding terrace, negatively disrupting the architectural rhythm of the roof slopes within the streetscene. The materials used to the front fascia and parapet walls are harmful in appearance and the detailing is of poor quality and in a highly visible location, to the detriment of the London planning@lambeth.gov.uk SW2 9QQ host building and the surrounding area. The retrospective works thereby fail to comply with Policies Q5, Q8 and Q11 of the Lambeth Local Plan (2021) and the Lambeth Design Guide SPD (2023).
By reason of the increased depth, the proposed ground floor rear extension would result in an adverse sense of enclosure to the adjoining neighbouring occupiers within no. 27 Andalus Road. The retrospective works thereby fail to comply with Policy Q2 of the Lambeth Local Plan (2021).

From the council's decision notice.

Application details

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

Planning application dates

Date validated: 28 November 2025
Consultation expiry: 19 March 2026
Consultation end: 3 January 2026
Neighbour consultation end: 19 March 2026
Target decision date: 23 January 2026

Applicant and agent

Agent: Zap Architecture
Architect profile: ZAP ARCHITECTURE LTD.
Agent address: 66-68 West Ham Lane London E15 4PT

Planning decision

Statutory period: 56 days

Additional information

Documents: 8

Site constraints

Checking the site

2/3

Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

Flood zone 1: Low probability (rivers and sea)

Also checked, none recorded (24)

flood storage areas, conservation 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.

Source: Lambeth

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

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