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Planning application

21/01508/LDCP

51 Mordaunt Street London SW9 9RD

Granted Lambeth Certificate of Lawful Use proposed

Proposal

Certificate of Lawful Development (proposed) in respect of the erection of a rear/side dormer extension over the outrigger with the installation of two front rooflights and a rear rooflight and the installation of a first floor rear side window.

As published by the council, reference 21/01508/LDCP

Timeline

Dates from the published record

  1. 14 Apr 2021

    Received by Lambeth

  2. 7 Jun 2021

    Decision issued: Grant Permission

  3. 28 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

  • 26/01889/FUL Awaiting decision

    23 Mordaunt Street London SW9 9RD

    Erection of a single storey ground floor rear and side infill extension.

    25 Jun 2026 72m away Full applications
  • 09/02626/FUL Refused

    45 Hargwyne Street London SW9 9RQ

    Erection of single storey ground floor rear and side infill extensions, alterations to windows to the side elevation at first floor level, alterations to roof over the rear return involving replacement of a pitched roof with a flat roof incorporating a domed skylight (part retrospective).

    30 Jul 2009 82m away Full applications
  • 14/04956/FUL Refused

    39 Hargwyne Street London SW99RQ

    Erection of a side and rear ground floor extension.

    17 Sep 2014 82m away Full applications
  • 14/02415/LDCP Refused

    39 Hargwyne Street London SW9 9RQ

    Application for a Certificate of Lawful Development (Proposed) with respect to the erection of rear and side infill extensions together with the erection of a rear dormer and installation of 3 front rooflights and a second floor rear extension incorporating a Juliet balcony.

    13 May 2014 82m away Lawful development
  • 08/01600/LDCP Granted

    45 Hargwyne Street London SW9 9RQ

    Application for a Certificate of Lawful Development (proposed) with respect to the erection of a rear dormer roof extension and the installation of two front rooflights

    29 Apr 2008 82m away Lawful development
  • 26/00692/FUL Refused

    108 Dalyell Road London SW9 9UP

    Use of property as a 9-room large-scale HMO (Sui Generis) together with the installation of aluminium doorsets to ground floor rear elevation, replacement timber window to lower ground floor rear elevation and refuse storage and associated alterations.

    5 Mar 2026 109m away Full applications

In Lambeth

  • 26/02152/LDCP Awaiting decision

    111 Hydethorpe Road London SW12 0JF

    Demolition of existing shed and erection of one single storey outbuilding in the rear garden

    23 Jul 2026 Lawful development
  • 26/00455/LDCP Granted

    129 Hydethorpe Road London SW12 0JF

    Application for Certificate of Lawful Development (Proposed) with respect to the erection of a rear dormer roof extension and installation of new rooflights to the front roof slope.

    12 Feb 2026 Lawful development
  • 26/01557/LDCP Granted

    6 Perran Road London SW2 3DL

    Application for a Certificate of Lawfulness (Proposed) with respect to the change of use of the property from dwelling house (Use Class C3) to small house in multiple occupation (HMO) (Use Class C4).

    22 May 2026 Lawful development
  • 26/01500/LDCP Granted

    126 Gipsy Road London SE27 9RE

    Application for a Certificate of Lawful Development (Proposed) with respect to erection of an L-shaped rear dormer roof extension and installation of 3 front roof lights.

    18 May 2026 Lawful development
  • 26/01999/LDCE Awaiting decision

    60 Brixton Road London SW9 6BS

    Application for a Certificate of Lawful Development (Existing) with respect to the continued existence of an elevated decking platform supported by adjoining walls above the roof terrace, together with safety railings to the outer edge, at Flat 2, 60 Brixton Road. Wooden decking replaced with composite decking as like for like maintenance. The submitted evidence details that the structure has been in place unchanged for 16 years.

    9 Jul 2026 Lawful development