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Planning application

145 Court Lane London Southwark SE21 7EE

Awaiting decision Southwark 25/AP/3369 Householder Application

Works: Extension Loft or dormer Windows or glazing Domestic

Read from the description, not a valuation. How we read the register

Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.

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.

As published by the council, reference 25/AP/3369

Application record

Reference
25/AP/3369
Type
Householder Application
Status
Under consideration/assessment
Received
18 Nov 2025
Validated
19 Nov 2025
Ward
Dulwich Village
Parish
Dulwich
Postcode
SE21 7EE

Site history

Applications at this address on the Southwark register

This site has had 8 applications since 2025: 4 approved, 0 refused.

  • 26/AP/2982 Granted

    145 Court Lane London Southwark SE21 7EE

    5 Day Notification: Overall reduction and reshape to T1 Magnolia. Reducing a tree of approximately 5.5m to 3.5m in Height and up to 2m in lateral spread. Reason to facilitate works in association with planning permission ref: 25/AP/3369 '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 to include zinc cladding, and installation of an air source heat pump'. All works in accordance with BS:3998:2010 as discussed onsite with LPA Urban Forester during the pre-commencement site visit.

    Submitted 9 Oct 2026
  • 26/AP/2672 Awaiting decision

    145 Court Lane London Southwark SE21 7EE

    Details of condition 8 (Basement Details) pursuant to planning permission 25/AP/3369 (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 to include zinc cladding, and installation of an air source heat pump.)

    Submitted 9 Sep 2026
  • 26/AP/2704 Awaiting decision

    145 Court Lane London Southwark SE21 7EE

    Details of condition 9 (Highway condition) pursuant to planning permission 25/AP/3369 (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 to include zinc cladding, and installation of an air source heat pump.)

    Submitted 9 Sep 2026
  • 26/AP/1511 Granted

    145 Court Lane London Southwark SE21 7EE

    Details of Condition 7 'Construction and Environmental Management Plan' required by planning permission ref: 25/AP/3369 '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 to include zinc cladding, and installation of an air source heat pump'

    Decided 14 Jul 2026 Conditions
  • 26/AP/1510 Granted

    145 Court Lane London Southwark SE21 7EE

    Partial discharge of condition 4 for Part C Only 'Cross Sections through Root Protection Areas' required by planning permission ref: 25/AP/3369 '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 to include zinc cladding, and installation of an air source heat pump'

    Decided 23 Jun 2026 Conditions
  • 26/AP/1507 Granted

    145 Court Lane London Southwark SE21 7EE

    Partial discharge of condition 4, Part B ONLY 'Arboricultural Method Statement' required by planning permission ref: 25/AP/3369 '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 to include zinc cladding, and installation of an air source heat pump'

    Decided 13 Jul 2026 Conditions
  • 25/AP/2819 Awaiting decision

    145 Court Lane London Southwark SE21 7EE

    Certificate of lawfulness (proposed) for the demolition of the existing outbuilding and toolshed and the construction of a new outbuilding and toolshed.

    Submitted 30 Sep 2025 Lawful development

Timeline

Dates from the published record

  1. 18 Nov 2025

    Received by Southwark

  2. 19 Nov 2025

    Validated

    Checked as complete and ready for consideration.

  3. 10 Aug 2026

    Added to PlanIndex

  4. Decision

    Awaiting decision

    Decision expected by 14 January 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

    Southwark took a median of 52 days over the applications it decided in the last year.

Cases linked to this one on the register

6 later applications on the register refer to this one:

  • 26/AP/2982 Granted

    145 Court Lane London Southwark SE21 7EE

    5 Day Notification: Overall reduction and reshape to T1 Magnolia. Reducing a tree of approximately 5.5m to 3.5m in Height and up to 2m in lateral spread. Reason to facilitate works in association with planning permission ref: 25/AP/3369 '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 to include zinc cladding, and installation of an air source heat pump'. All works in accordance with BS:3998:2010 as discussed onsite with LPA Urban Forester during the pre-commencement site visit.

    Submitted 9 Oct 2026
  • 26/AP/2672 Awaiting decision

    145 Court Lane London Southwark SE21 7EE

    Details of condition 8 (Basement Details) pursuant to planning permission 25/AP/3369 (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 to include zinc cladding, and installation of an air source heat pump.)

    Submitted 9 Sep 2026
  • 26/AP/2704 Awaiting decision

    145 Court Lane London Southwark SE21 7EE

    Details of condition 9 (Highway condition) pursuant to planning permission 25/AP/3369 (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 to include zinc cladding, and installation of an air source heat pump.)

    Submitted 9 Sep 2026
  • 26/AP/1511 Granted

    145 Court Lane London Southwark SE21 7EE

    Details of Condition 7 'Construction and Environmental Management Plan' required by planning permission ref: 25/AP/3369 '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 to include zinc cladding, and installation of an air source heat pump'

    Decided 14 Jul 2026 Conditions
  • 26/AP/1510 Granted

    145 Court Lane London Southwark SE21 7EE

    Partial discharge of condition 4 for Part C Only 'Cross Sections through Root Protection Areas' required by planning permission ref: 25/AP/3369 '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 to include zinc cladding, and installation of an air source heat pump'

    Decided 23 Jun 2026 Conditions
  • 26/AP/1507 Granted

    145 Court Lane London Southwark SE21 7EE

    Partial discharge of condition 4, Part B ONLY 'Arboricultural Method Statement' required by planning permission ref: 25/AP/3369 '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 to include zinc cladding, and installation of an air source heat pump'

    Decided 13 Jul 2026 Conditions

Who's behind it

Company information only, from the register and Companies House

Mittelman Associates LLP Agent, registered in London

Active · incorporated 2008 · London

38 applications on PlanIndex · across 5 councils · 93% granted

Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.

See their track record

Documents

Plans, drawings, consultee responses and the officer's report

20 documents on file for this application

A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.

Watch members (£5 a month) open the document list from here.

Open the documents

What happens while it is decided

This application is with Southwark for determination, against a statutory target of eight weeks. Over the last year Southwark decided householder applications in a median of 56 days. More in our guide to how long planning decisions take.

About householder applications

Householder applications cover work to an existing house and its garden, such as extensions, lofts and outbuildings, and cannot create a separate dwelling or change what the building is used for. More in our guide to planning application types.

Nearby applications

Within 0.3 miles

  • 145 Court Lane London Southwark SE21 7EE

    25/AP/2819 Submitted 30 Sep 2025 50 yards away

    95% historically approved · decision due ~26 Nov

    Certificate of lawfulness (proposed) for the demolition of the existing outbuilding and toolshed and the construction of a new outbuilding and toolshed.

    Awaiting decision Lawful development Demolition 8 docs

  • 145 Court Lane London Southwark SE21 7EE

    26/AP/1511 Submitted 26 May 2026 50 yards away

    Details of Condition 7 'Construction and Environmental Management Plan' required by planning permission ref: 25/AP/3369 '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 to include zinc cladding, and installation of an air source heat pump'

    Granted Conditions Extension Loft or dormer +1 8 docs

  • 145 Court Lane London Southwark SE21 7EE

    26/AP/1510 Submitted 26 May 2026 50 yards away

    Partial discharge of condition 4 for Part C Only 'Cross Sections through Root Protection Areas' required by planning permission ref: 25/AP/3369 '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 to include zinc cladding, and installation of an air source heat pump'

    Granted Conditions Extension Loft or dormer +1 6 docs

  • 145 Court Lane London Southwark SE21 7EE

    26/AP/1507 Submitted 26 May 2026 50 yards away

    Partial discharge of condition 4, Part B ONLY 'Arboricultural Method Statement' required by planning permission ref: 25/AP/3369 '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 to include zinc cladding, and installation of an air source heat pump'

    Granted Conditions Extension Loft or dormer +1 8 docs

  • 145 Court Lane London Southwark SE21 7EE

    26/AP/2982 Submitted 9 Oct 2026 50 yards away

    5 Day Notification: Overall reduction and reshape to T1 Magnolia. Reducing a tree of approximately 5.5m to 3.5m in Height and up to 2m in lateral spread. Reason to facilitate works in association with planning permission ref: 25/AP/3369 '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 to include zinc cladding, and installation of an air source heat pump'. All works in accordance with BS:3998:2010 as discussed onsite with LPA Urban Forester during the pre-commencement site visit.

    Granted Extension Loft or dormer +2

  • 129 Court Lane London Southwark SE21 7EE

    22/AP/3372 Submitted 26 Sep 2022 50 yards away

    Certificate of lawful development (proposed) for the installation of a garden studio/shed

    Granted Lawful development 7 docs
    Small domestic

In Southwark

  • 26/AP/2158 Granted

    7 Alma Grove London Southwark SE1 5PY

    Erection of a rear ground floor side extension with a framed glass roof and bi-folding rear doors. Replacement of windows and door. Alterations to external facade.

    Received 21 Jul, published by the council 25 Jul 2026 Householder
  • 26/AP/2601 Awaiting decision

    49 Henshaw Street London Southwark SE17 1PE

    Demolition of existing rear extension and construction of part single, part two storey rear extension and erection of roof terrace on main roof with balustrades and glazed access hatch.

    2 Sep 2026 Householder
  • 26/AP/2545 Awaiting decision

    76 Shenley Road London Southwark SE5 8NQ

    Construction of a single storey side and rear extension to the rear; construction of a rear dormer roof extension over the main roofslope and the installation of 3x rooflights to the front roofslope.

    Received 26 Aug, published by the council 3 Sep 2026 Householder
  • 26/AP/2533 Awaiting decision

    28 Tyrrell Road London Southwark SE22 9NE

    Construction of rear extension.

    Received 25 Aug, published by the council 28 Aug 2026 Householder
  • 26/AP/2517 Awaiting decision

    65 Calton Avenue London Southwark SE21 7DF

    Construction of a ground-floor side-rear extension with terrace reinstated above; alterations to the rear outrigger, including raising the eaves and ridge, removal of the chimney stack, replacement windows, and installation of two rooflights; enlargement of the existing rear dormer; erection of bin and bike stores in the front garden, together with new landscaping and a front boundary wall; installation of an EV charger to front elevation and removal of existing front porch door; removal of existing garden buildings and erection of a shed, sauna and pergola in the rear garden, together with new landscaping and decking.

    Received 24 Aug, published by the council 28 Aug 2026 Householder