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145 Court Lane London Southwark SE21 7EE

25/AP/3369Householder ApplicationApproved
Householder

Approved on 24 March 2026

Site boundary (council red line)

Proposal

A full house renovation including a lower-ground floor with front and rear lightwells, construction of a ground-floor rear extension, internal alterations on all floors, refurbishment of the existing elevations and windows, alterations to the loft including revised staircase and refurbished dormer, and installation of an air source heat pump.

Received
18 November 2025
Ward
Dulwich Village
Agent
Mittelman Associates LLP
  1. Received18 Nov
  2. Validated19 Nov
  3. Consult.
  4. Target13 Jan
  5. Decided24 Mar

Decided in 125 days (council typically 49)

About this application

This is a full planning application for a dormer extension at 145 Court Lane London Southwark SE21 7EE. Southwark has handled 1,045 applications of this type. This one was decided in 126 days, 11 weeks longer than Southwark's typical decision time. The site is in the Dulwich Village conservation area. There have been 7 other applications at this address. In the past year there have been 227 applications across Dulwich Village. We hold 1,063 applications in total for the SE21 postcode area.

93% of full applications at London Borough of Southwark were approved. Across all application types, the council typically decides in about 7 weeks (median).

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

Application details

Postcode
SE21 7EE
Application type
Householder Application
Scale / size
Small
Parish
Dulwich

Planning application dates

Date validated
19 November 2025
Target decision date
13 January 2026

Applicant and agent

Agent
Mittelman Associates LLP
Agent address
C22A Parkhall 40 Martell Road London SE21 8EN United Kingdom

Planning decision

Statutory period
55 days

Additional information

Comments
0
Documents
20

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Conservation area: Dulwich Village
  • 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.

Associated applications

  1. 2026
    12 Oct

    5 Day Notification: Overall reduction and reshape to T1 Magnolia. Reducing a tree of approximately 5.5m to…

    ApprovedApplicationRelated26/AP/2982
  2. 2026
    10 Sep

    Details of condition 8 (Basement Details) pursuant to planning permission 25/AP/3369

    ApprovedApplicationRelated26/AP/2672
  3. 2026
    10 Sep

    Details of condition 9 (Highway condition) pursuant to planning permission 25/AP/3369

    ApprovedApplicationRelated26/AP/2704
  4. 2026
    27 May

    Partial discharge of condition 4b 'Arboricultural Method Statement' required by planning permission ref…

    ApprovedDischarge of conditions26/AP/1507
  5. 2026
    27 May

    Partial discharge of condition 4c 'Cross Sections through Root Protection Areas' required by planning…

    ApprovedDischarge of conditions26/AP/1510
  6. 2026
    27 May

    Details of Condition 7 'Construction and Environmental Management Plan' required by planning permission ref…

    ApprovedDischarge of conditions26/AP/1511
  7. 2025
    18 Nov

    A full house renovation including a lower-ground floor with front and rear lightwells, construction of a…

    This applicationApprovedFull25/AP/3369

Source: Southwark

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

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