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Planning application

20 Harlescott Road London Southwark SE15 3BZ

Granted Southwark 26/AP/0307 Certificate of Lawful Dev. - Proposed

Works: Extension Loft or dormer

Permission granted. Work must normally begin within three years of the decision or the permission lapses.

Proposal

Certificate of lawfulness (proposed) for conversion of Loft including formation of rear dormer and outrigger with skylights to front roof slope.

As published by the council, reference 26/AP/0307

Application record

Reference
26/AP/0307
Type
Certificate of Lawful Dev. - Proposed
Status
Granted
Decision
Granted As published: Certificate of Lawfulness Prop- GRANTED
Received
3 Feb 2026
Validated
3 Feb 2026
Decided
25 Mar 2026
Ward
Peckham Rye
Parish
Peckham And Nunhead
Decision by
Delegated Panel - Simple
Postcode
SE15 3BZ

Site history

Applications at this address on the Southwark register

This site has had 2 applications since 2026: 2 approved, 0 refused.

  • 26/AP/0394 Granted

    20 Harlescott Road London Southwark SE15 3BZ

    Construction of a single storey ground floor wraparound rear extension.

    Decided 7 Apr 2026 Householder

Timeline

Dates from the published record

  1. 3 Feb 2026

    Received by Southwark

  2. 25 Mar 2026

    Decision issued: Certificate of Lawfulness Prop- GRANTED

  3. 10 Aug 2026

    Added to PlanIndex

Who's behind it

Company information only, from the register and Companies House

C4 Design Ltd Agent, a design practice registered in Dartford

Active · incorporated 2016 · Dartford

18 applications on PlanIndex · across 6 councils · 62% 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

9 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.

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What this grant of permission means

Southwark granted permission on 25 March 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

About lawful development applications

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

Nearby applications

Within 0.3 miles

  • 20 Harlescott Road London Southwark SE15 3BZ

    26/AP/0394 Submitted 10 Feb 2026 50 yards away

    Construction of a single storey ground floor wraparound rear extension.

    Granted Householder Extension 11 docs
    Small domestic
  • 22 Harlescott Road London Southwark SE15 3BZ

    25/AP/3283 Submitted 11 Nov 2025 50 yards away

    95% historically approved · decision due ~6 Jan

    Certificate of lawful development (proposed) for a roof dormer over the main roof slope, a dormer over the existing rear projection and alterations to the existing ground floor outrigger. Please refer to supporting documents for details.

    Awaiting decision Lawful development Extension Loft or dormer 11 docs
  • 22 Harlescott Road London Southwark SE15 3BZ

    25/AP/3284 Submitted 11 Nov 2025 50 yards away

    95% historically approved · decision due ~8 Jan

    Construction of a roof dormer, over the rear pitch of the main roof, a dormer over the existing rear projection and alterations to the existing ground floor rear extension.

    Awaiting decision Householder Extension Loft or dormer 18 docs
    Domestic
  • 26 Harlescott Road London Southwark SE15 3BZ

    21/AP/3490 Submitted 4 Oct 2021 50 yards away

    Construction of a 'L' shaped rear dormer extension with juliet balcony, increasing the roof ridge line by 400mm and the addition of two roof lights to the front roof slope.

    Granted Householder Extension Loft or dormer 16 docs
    Domestic
  • 10 Harlescott Road London Southwark SE15 3BZ

    22/AP/0220 Submitted 26 Jan 2022 50 yards away

    Construction of single storey rear extension.

    Granted Householder Extension 9 docs
    Small domestic
  • 6 Harlescott Road London Southwark SE15 3BZ

    22/AP/2558 Submitted 18 Jul 2022 50 yards away

    Construction of a L-shaped dormer loft extension to the rear with a ridge line raise of 500mm and installation of 2no rooflights to the front roof slope.

    Granted Householder Extension Loft or dormer 14 docs
    Domestic

In Southwark

  • 26/AP/2574 Awaiting decision

    23 Alberta Street London Southwark SE17 3SF

    Certificate of lawfulness (proposed) for construction of a rear dormer and the installation of 1x rooflight to the front roofslope.

    Received 1 Sep, published by the council 8 Sep 2026 Lawful development
  • 26/AP/2509 Awaiting decision

    Newington Gardens Harper Road London Southwark SE1

    Certificate of Lawfulness (proposed) for improvement works to the playground at Newington Gardens to include the removal of current playground equipment and installation of new accessible equipment.

    Received 21 Aug, published by the council 7 Sep 2026 Lawful development
  • 26/AP/1673 Granted

    Flat 67 Benbow House 24 New Globe Walk London Southwark SE1 9DS

    Certificate of Lawful Development to replace existing external doors with new thermally improved doors

    Received 11 Jun, published by the council 25 Jul 2026 Lawful development
  • 26/AP/1909 Granted

    6 Ethnard Road London Southwark SE15 1RU

    Certificate of lawfulness (proposed) for a loft conversion with rear dormer

    Received 30 Jun, published by the council 25 Jul 2026 Lawful development
  • 26/AP/2486 Awaiting decision

    84 Croxted Road London Southwark SE21 8NP

    Certificate of lawfulness (proposed) for the formation of a moveable structure (as defined under the Caravan Site Act) that can be separated into 2 sections and removed from the rear garden by crane. Refer to the following drawings: 318 SP 00 (PD) 318 SP 01 (PD) 318 SP 101 (PD) 318 GS 01 (PD) 318 GS 02 (PD)

    Received 19 Aug, published by the council 20 Aug 2026 Lawful development