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20 Harlescott Road London Southwark SE15 3BZ

26/AP/0307Certificate of Lawful Dev. - ProposedApproved
Outline / PiP

Approved on 25 March 2026

Council decision: Certificate of Lawfulness Prop- GRANTEDDelegated (officer decision)

Site boundary (council red line)

Proposal

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

Received
3 February 2026
Decision level
Delegated (officer decision)
Ward
Peckham Rye
Agent
C4 Design Ltd
  1. Received3 Feb
  2. Validated3 Feb
  3. Consult.
  4. Target30 Mar
  5. Decided25 Mar

Decided in 50 days (council typically 49)

About this application

This is an outline application for a dormer extension at 20 Harlescott Road London Southwark SE15 3BZ. Southwark has handled 202 applications of this type. This one was decided in 50 days. There has been 1 other application at this address. In the past year there have been 73 applications across Peckham Rye. We hold 1,344 applications in total for the SE15 postcode area.

94% of outline 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
SE15 3BZ
Application type
Certificate of Lawful Dev. - Proposed
Scale / size
Small
Parish
Peckham And Nunhead

Planning application dates

Date validated
3 February 2026
Target decision date
30 March 2026
Permission expires
25 March 2031

Applicant and agent

Agent
C4 Design Ltd
Agent address
Trinity House Bullace Lane Dartford DA1 1BB

Planning decision

Statutory period
55 days

Additional information

Comments
0
Documents
9

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.

© 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
    10 Feb

    Construction of a single storey ground floor wraparound rear extension.

    ApprovedHouseholderFiled alongside26/AP/0394
  2. 2026
    3 Feb

    Certificate of lawfulness (proposed) for conversion of Loft including formation of rear dormer and outrigger…

    This applicationApprovedOutline26/AP/0307

Source: Southwark

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

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