Planning application
23 Alberta Street London Southwark SE17 3SF
Works: Loft or dormer
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
Certificate of lawfulness (proposed) for construction of a rear dormer and the installation of 1x rooflight to the front roofslope.
As published by the council, reference 26/AP/2574
Application record
- Reference
- 26/AP/2574
- Type
- Certificate of Lawful Dev. - Proposed
- Status
- Under consideration/assessment
- Received
- 1 Sep 2026
- Validated
- 8 Sep 2026
- Ward
- Newington
- Parish
- Borough, Bankside And Walworth
- Postcode
- SE17 3SF
Site history
Applications at this address on the Southwark register
This site has had 2 applications since 2022: 1 approved, 0 refused.
-
22/AP/0196 Granted
23 Alberta Street London Southwark SE17 3SF
Certificate of lawfulness (proposed) for the construction of a new front porch, single storey rear extension and rear dormer extension, and the installation of three rooflights on the front roof slope and two rooflights on the rear roof slope.
Timeline
Dates from the published record
-
1 Sep 2026
Received by Southwark
-
8 Sep 2026
Validated
Checked as complete and ready for consideration.
-
8 Sep 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 3 November 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.
Southwark took a median of 52 days over the applications it decided in the last year.
Who's behind it
Company information only, from the register and Companies House
Larissa Johnston Architects Agent, an architecture practice registered in London
Active · incorporated 2015 · London
4 applications on PlanIndex · across 2 councils
Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.
See their track recordDocuments
Plans, drawings, consultee responses and the officer's report
12 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.
Watch members (£5 a month) open the document list from here.
Open the documentsWhat happens while it is decided
This application is with Southwark for determination, against a statutory target of eight weeks. Over the last year Southwark decided lawful development applications in a median of 50 days. More in our guide to how long planning decisions take.
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 0.3 miles
-
23 Alberta Street London Southwark SE17 3SF
Certificate of lawfulness (proposed) for the construction of a new front porch, single storey rear extension and rear dormer extension, and the installation of three rooflights on the front roof slope and two rooflights on the rear roof slope.
Granted Lawful development Extension Loft or dormer 14 docsSmall domestic -
Unit 3 4 Canterbury Place London Southwark SE17 3AG
Alterations and creation of new shop front and installation of doors to the side elevation.
Granted Full applications Windows or glazing 11 docs -
110 Ambergate Street London Southwark SE17 3SA
Construction of a timber single-storey rear ground-floor extension with a sedum green roof; installation of two new rear dormer extensions at first- and second-floor levels; installation of rooflights to the front roof slope; replacement of all windows and minor internal reconfiguration works.
Granted Householder Extension Loft or dormer +1 27 docsSmall domestic -
57 Kennington Park Road London Southwark SE11 4JQ
1 x Lime - Reduce Overall Size Of Crown By 3m to previous points, retaining knuckles.
Granted Trees 6 docs -
21 Ambergate Street London Southwark SE17 3RY
Construction of single storey rear wrap around extension with a maximum height of 3m to west elevation.
Granted Full applications Extension 20 docsSmall domestic -
21 Ambergate Street London Southwark SE17 3RY
Non material amendment to planning permission 21/AP/3555 (Construction of single storey rear wrap around extension with a maximum height of 3m to west elevation) to install 3 no. new high level obscured windows to the north western side elevation and for the approved flat roof skylight to be enlarged.
Decided Conditions Extension Windows or glazing 23 docsSmall domestic
Other lawful development applications
In Southwark
-
26/AP/2509 Awaiting decision
Newington Gardens Harper Road London Southwark SE1
Certificate of Lawfulness (proposed) for improvement works to the playground at Newington Gardens to include the removal of current playground equipment and installation of new accessible equipment.
-
26/AP/1673 Granted
Flat 67 Benbow House 24 New Globe Walk London Southwark SE1 9DS
Certificate of Lawful Development to replace existing external doors with new thermally improved doors
-
26/AP/1909 Granted
6 Ethnard Road London Southwark SE15 1RU
Certificate of lawfulness (proposed) for a loft conversion with rear dormer
-
26/AP/2486 Awaiting decision
84 Croxted Road London Southwark SE21 8NP
Certificate of lawfulness (proposed) for the formation of a moveable structure (as defined under the Caravan Site Act) that can be separated into 2 sections and removed from the rear garden by crane. Refer to the following drawings: 318 SP 00 (PD) 318 SP 01 (PD) 318 SP 101 (PD) 318 GS 01 (PD) 318 GS 02 (PD)
-
26/AP/1759 Granted
29 Dundas Road London Southwark SE15 2DR
Certificate of Lawful Development (Proposed) for loft conversion with rear dormer, installation of roof lights to front roof slope, construction of a rear outbuilding, fenestration changes including new and replacement windows and installation of soil vent pipe.