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Planning application

21/1061/CP

53 SIEBERT ROAD, BLACKHEATH, LONDON, SE3 7EJ

Granted Greenwich Lawful use (operation)

Proposal

Lawful Development Certificate (proposed) for the construction of a rear dormer roof extension and the installation of 2no. rooflights to front roofslope.

As published by the council, reference 21/1061/CP

Timeline

Dates from the published record

  1. 24 Mar 2021

    Received by Greenwich

  2. 13 Apr 2021

    Validated

    Checked as complete and ready for consideration.

  3. 7 Jun 2021

    Decision issued: Approve

  4. 26 Jul 2026

    Added to PlanIndex

What a grant of permission means

The process from here

Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.

Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.

About lawful development applications

How this application type works

A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.

More on lawful development applications in our guide

Nearby applications

Within 500 metres

  • 26/2246/HD Awaiting decision

    171 WESTCOMBE HILL, BLACKHEATH, LONDON, SE3 7DP

    Construction of single storey rear extension with associated internal alterations and replacement of the dilapidated garage to the bottom of the garden.

    27 Jul 2026 60m away Householder
  • 22/4154/PN1 Refused

    59 EASTCOMBE AVENUE, CHARLTON, LONDON, SE7 7JD

    Prior Approval for the construction of a single storey rear extension which will extend beyond the rear wall of the original dwelling by 4.80m, for which the maximum height will be 2.30m and the height at the eaves will be 2.45m.

    13 Dec 2022 105m away Prior approval
  • 26/1725/CP Awaiting decision

    37 EASTCOMBE AVENUE, CHARLTON, LONDON, SE7 7JD

    Certificate of Lawfulness (Proposed) is sought for erection of a hip-to-gable L-shaped dormer loft conversion and all associated works.

    9 Jun 2026 105m away Lawful development
  • 26/1616/HD Awaiting decision

    43 EASTCOMBE AVENUE, CHARLTON, LONDON, SE7 7JD

    Construction of a single-storey side/ rear wraparound extension and installation of a rooflight with associated works.

    1 Jun 2026 105m away Householder
  • 26/1922/A Awaiting decision

    Land at Bramshot Avenue, London, SE7 7HY

    Retrospective application for conversion of two (2) DM6 digital advertising displays to full motion.

    29 Jun 2026 136m away Advertising
  • 24/2310/TC Granted

    38 GLENLUCE ROAD, BLACKHEATH, LONDON, SE3 7SB

    Statement of work: T1 Western Red Cedar - Front garden: To reduce the overall height by approximately 1.5 metres and trim the remaining canopy into a tight and compact form. T2 Robinia - Neighbouring tree RHB at number 36: To reduce all overhanging lateral branches back to boundary line. T3 Holly - Rear garden: Crown Reduction - To reduce the canopy back into a tight compact dome shape including cutting back branches overhanging the right hand boundary. T4 Lime - Greenwich council tree on the rear boundary: To lift the lower canopy overhanging the garden to approximately 4 metres from ground level. Reason for work ? General maintenance.

    29 Aug 2024 136m away Trees

In Greenwich

  • 26/2269/CE Awaiting decision

    51 BANNOCKBURN ROAD, PLUMSTEAD, LONDON, SE18 1ET

    Certificate of Lawfulness (Existing) is sought for HMO with five ensuite rooms with shared kitchen, arranged over ground, first & second floors. This use has been in operation and licensed since at least 2018.

    29 Jul 2026 Lawful development
  • 26/2258/CP Awaiting decision

    4 WELTON ROAD, PLUMSTEAD, LONDON, SE18 2JF

    Certificate of Lawfulness (Proposed) is sought for proposed outbuilding - Summer House.

    29 Jul 2026 Lawful development
  • 26/1580/CP Withdrawn

    8 PARK ROW, GREENWICH, LONDON, SE10 9NG

    Certificate of Lawfulness (Proposed) is sought for garden room to the rear of the garden.

    26 May 2026 Lawful development
  • 26/1630/CE Granted

    28 CHELSWORTH DRIVE, PLUMSTEAD, LONDON, SE18 2RA

    Certificate of Lawfulness (Existing) is sought for the change of use from existing dwellinghouse (Class C3) to a supported living accommodation for up to four (4) young people aged 16-17 (Class C2).

    1 Jun 2026 Lawful development
  • 26/2250/CE Awaiting decision

    ANNEXE AT, 12 HIGHMEAD, SE18 2DJ

    Certificate of Lawfulness (Existing) is sought for continued use as an independent dwellinghouse.

    28 Jul 2026 Lawful development