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Planning application

26/AP/1281

3 Montague Square London Southwark SE15 2LQ

Granted Southwark Certificate of Lawful Dev. - Proposed

Proposal

Certificate of lawfulness (proposed) for the erection of a ground floor rear extension and conversion of the garage to a habitable room, including the replacement of the garage door with a window.

As published by the council, reference 26/AP/1281

Timeline

Dates from the published record

  1. 5 May 2026

    Received by Southwark

  2. 8 May 2026

    Validated

    Checked as complete and ready for consideration.

  3. 24 Jun 2026

    Decision issued: Certificate of Lawfulness Prop- GRANTED

  4. 25 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/AP/1280 Refused

    3 Montague Square London Southwark SE15 2LQ

    Prior approval notification for a ground floor rear extension

    5 May 2026 1m away Full applications
  • DC/19/113677 Granted

    SLEEPER COURT, POMEROY STREET, LONDON, SE14 5FY

    Details submitted in respect of part of Condition (1) 'Landscape Treatment' and Condition (7) 'Life Time Standard' for the planning permission referenced DC/10/073539 dated 15/10/2010 for the construction of a part three/part four storey block on former garden area of Hammersley House, Pomeroy Street SE14, to provide 2 one bedroom and 6 two bedroom self-contained flats.

    28 Aug 2019 106m away Full applications
  • DC/19/113815 Granted

    43-49 POMEROY STREET, LONDON, SE14 5BW

    The temporary change of use of part ground floor B1(a) floorspace to provide a marketing and sales suite (sui generis) at 43-49 Pomeroy Street, London, SE14

    10 Sep 2019 122m away Full applications
  • DC/19/113673 Refused

    43-49 POMEROY STREET, LONDON, SE14 5BW

    Details submitted in compliance with Condition 32(a) (Solar Panels) of the Planning Permission DC/15/093731 dated 3 August 2016 for the demolition of existing buildings at 43 ? 49 Pomeroy Street, SE14 and the construction of a part six, part seven storey building to the front of the site and the construction of a row of three storey buildings to the rear of the site, comprising in total 441.6m² of Class B1 (Business) floorspace and 65 residential units (Class C3)

    28 Aug 2019 122m away Full applications
  • DC/19/112533 Refused

    43-49 POMEROY STREET, LONDON, SE14 5BW

    Details submitted in compliance with Condition 20 (a) (Green Roof Details), of the Planning Permission DC/15/093731 dated 3 August 2016 for the demolition of existing buildings at 43 ? 49 Pomeroy Street, SE14 and the construction of a part six, part seven storey building to the front of the site and the construction of a row of three storey buildings to the rear of the site, comprising in total 441.6m² of Class B1 (Business) floorspace and 65 residential units (Class C3).

    3 Jun 2019 122m away Full applications
  • DC/26/143112 Granted

    40 ROMNEY CLOSE, LONDON, SE14 5JH

    Application for Prior Approval under Schedule 2, Part 1, Class A, Part (g) of the Town and Country Planning (General Permitted Development) Order 2015 (as amended) for the construction of a single storey rear extension with a depth of 4.50m, a maximum height of 3.18m and an eaves height of 3.0m at 40 Romney Close, SE14.

    25 Feb 2026 133m away Prior approval

In Southwark

  • 26/AP/1647 Granted

    7 Medlar Street London Southwark SE5 0JU

    Certificate of lawfulness (proposed) for the construction of an L-shaped rear dormer extension and installation of 2no. rooflights to the front roof slope

    8 Jun 2026 Lawful development
  • 26/AP/2189 Awaiting decision

    Surrey Square Park Surrey Square London Southwark SE17 2JX

    Certificate of Lawfulness (existing) for refurbishment and reconfiguration of the existing children's playground and landscape improvements including new pathways and planting within Surrey Square Park.

    24 Jul 2026 Lawful development
  • 26/AP/2168 Awaiting decision

    150A Lower Road London Southwark SE16 2UG

    Certificate of lawfulness (proposed) for the change of use of a single dwellinghouse (Use Class C3) to a House in Multiple Occupation (Use Class C4) occupied by three unrelated individuals.

    22 Jul 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