Skip to content
PlanIndex Get alerts
Menu

Planning application

17 Piermont Road London Southwark SE22 0LN

Granted Southwark 20/AP/3692 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 lawful development (proposed) for the construction of a dormer roof extension at roof level over rear portion of main house and outrigger; installation of 3 x rooflights to front elevtion and 1x roof light to dormer.

As published by the council, reference 20/AP/3692

Application record

Reference
20/AP/3692
Type
Certificate of Lawful Dev. - Proposed
Status
Granted
Decision
Certificate of Lawfulness Prop- GRANTED
Received
15 Dec 2020
Validated
16 Dec 2020
Decided
26 Jan 2021
Ward
Dulwich Hill
Parish
Dulwich
Decision by
Delegated Panel - Trees
Postcode
SE22 0LN

Site history

Applications at this address on the Southwark register

This site has had 2 applications since 2020: 1 approved, 0 refused.

  • 26/AP/2339 Awaiting decision

    17 Piermont Road London Southwark SE22 0LN

    Construction of a ground floor single-storey rear and side extension and reconfiguration of existing side-return roof including replacement of existing Velux rooflights.

    Submitted 5 Aug 2026

Timeline

Dates from the published record

  1. 15 Dec 2020

    Received by Southwark

  2. 16 Dec 2020

    Validated

    Checked as complete and ready for consideration.

  3. 26 Jan 2021

    Decision issued: Certificate of Lawfulness Prop- GRANTED

  4. 4 Aug 2026

    Added to PlanIndex

Who's behind it

Company information only, from the register and Companies House

Agent on file, an architecture practice registered in London

34 applications on PlanIndex · across 6 councils · 79% granted

Trade members see who it is, their full track record, and every application they have filed.

See who's behind it

Documents

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

15 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.

Trade members open them from here.

Open the documents

What this grant of permission means

Southwark granted permission on 26 January 2021, 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 500 metres

  • 17 Piermont Road London Southwark SE22 0LN

    26/AP/2339 Submitted 5 Aug 2026 19m away

    95% historically approved · decision due ~1 Oct

    Construction of a ground floor single-storey rear and side extension and reconfiguration of existing side-return roof including replacement of existing Velux rooflights.

    Awaiting decision Extension Loft or dormer
    Small domestic
  • 9 Piermont Green London Southwark SE22 0LW

    22/AP/2667 Submitted 25 Jul 2022 49m away

    Loft conversion including hip to gable extension and 2no roof lights in the front pitch and solar panels on rear roof top.

    Granted Householder Extension Loft or dormer 30 docs
    Domestic
  • 9 Piermont Green London Southwark SE22 0LW

    22/AP/2666 Submitted 25 Jul 2022 49m away

    Certificate of lawfulness for a proposed loft conversion including hip to gable extension, insertion of two roof lights to the front pitch, insertion of two windows to side elevation, removal of chimney and installation of nine solar panels

    Refused Lawful development Extension Loft or dormer +1 30 docs
  • 70 Upland Road London Southwark SE22 0DB

    26/AP/0542 Submitted 24 Feb 2026 92m away

    Retrospective application for construction of a garden room to be in residential use ancillary to the main dwelling house.

    Granted Householder 11 docs
    Small domestic
  • 70 Upland Road London Southwark SE22 0DB

    23/AP/2608 Submitted 18 Sep 2023 92m away

    Non material amendment of planning permission 22/AP/0941: Construction of ground and first floor extensions at the rear and off-street car parking.NMA sought: 1. to reduce the ground floor width so that is it in line with the building;2. change the materials;3. add windows to the side elevation;

    Decided Conditions Extension Windows or glazing 8 docs
  • 70 Upland Road London Southwark SE22 0DB

    26/AP/1417 Submitted 18 May 2026 94m away

    Certificate of lawful development (existing) confirming lawfulness of a garden room located at the rear of the garden.

    Granted Lawful development 8 docs

In Southwark

  • 26/AP/1316 Granted

    Seavington House Champion Hill London Southwark SE5 8DN

    Certificate of lawfulness (proposed) to confirm excavation works carried out on the site in the form of trial pits constitute a material operation under the Town and Country Planning Act 1990 and therefore represent lawful commencement of the approved planning permission 22/AP/0174.

    7 May 2026 Lawful development
  • 26/AP/1420 Granted

    40 Strathnairn Street London Southwark SE1 5BL

    Certificate of lawfulness (proposed) for construction of a ground floor rear extension and a rear dormer.

    18 May 2026 Lawful development
  • 26/AP/1618 Granted

    252 Barry Road London Southwark SE22 0JS

    Certificate of lawful development (proposed) for the construction of a rear dormer extension.

    5 Jun 2026 Lawful development
  • 26/AP/1577 Granted

    Residence Inn By Marriott London Bridge 201-211 Long Lane London SE1 4PN

    Certificate of lawfulness (proposed) for undertaking of facade remedial works to remove combustible cladding materials and replace with a like-for-like non-combustible cladding with no change to the outer aesthetics of the building.

    2 Jun 2026 Lawful development
  • 26/AP/1509 Withdrawn

    Railway Arch 101 Rockingham Street London Southwark SE1 6PD

    Certificate of lawfulness (proposed) for confirmation of implementation of planning permission 22/AP/3065: Change of use of the railway arch at 101 Rockingham Street from Use Class B8 (Storage/Distribution) to Use Classes E (Commercial, Business and Service) and F2 (Local Community) and a new glazed facade to the exterior including 2x extractor fans.

    27 May 2026 Lawful development