40 Strathnairn Street London Southwark SE1 5BL Data via plota.co.uk

26/AP/2405 - Householder Application Under consideration/assessment
Extensions & alterations

Proposal

Construction of a single-storey rear extension, rear dormer loft conversion with a Juliet balcony, and replacement of existing first-floor rear windows. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
12 Aug 2026
✓
Validated
3 Sept 2026
Decision
Expected by 28 Oct 2026

This application is under consideration - no decision has been issued yet. Plota predicts a decision around 24 Oct 2026, from Southwark's recent extensions.

Documents 12

Statements & assessments 3

PDF DESIGN AND ACCESS STATEMENT Design and Access statement · 3 Sept 2026 View ↗ PDF PLANNING STATEMENT Planning statement · 3 Sept 2026 View ↗ PDF REASONABLE EXCEPTION STATEMENT Fire Statement · 3 Sept 2026 View ↗

Plans & drawings 6

PDF A002-210 REV 5 PROPOSED PLAN 1 Plan - Proposed · 3 Sept 2026 View ↗ PDF A002-211 REV 4 PROPOSED PLAN 2 Plan - Proposed · 3 Sept 2026 View ↗ PDF A002-311 REV 4 PROPOSED SECTION 1 Plan - Proposed · 3 Sept 2026 View ↗ PDF A002-312 REV 4 PROPOSED SECTION 2 Plan - Proposed · 3 Sept 2026 View ↗ PDF A002-411 REV 4 PROPOSED ELEVATION 1 Plan - Proposed · 3 Sept 2026 View ↗ PDF A002-412 REV 5 PROPOSED ELEVATION 2 Plan - Proposed · 3 Sept 2026 View ↗

Application forms 2

PDF APPLICATION FORM - WITHOUT PERSONAL DATA Application - Form (Without Personal data) · 12 Aug 2026 View ↗ PDF COMMUNITY INFRASTRUCTURE LEVY - COMPLETED FORM CIL - GIA Form · 12 Aug 2026 View ↗

Other documents 1

PDF PARKING PROVISION - DETAILS Parking Provision · 12 Aug 2026 View ↗

All documents on the council site ↗

Site constraints 5

Flood zone 3, rivers and sea
High chance: a 1 in 100 or greater annual chance from rivers, or 1 in 200 from the sea. Any development here needs a flood risk assessment. Defences are not counted.
The Environment Agency flood map for planning. Homes in zone 3 must also pass the sequential test. Surface water flooding is a separate map.
Flood map ↗
Archaeological priority area: North Southwark and Roman Roads
An assessment or field evaluation may be asked for before ground works.
The council or Historic England considers archaeology likely here. A desk-based assessment, and sometimes trial trenching, can be asked for with the application.
Air quality management area: Southwark AQMA
The council has declared the area as failing an air quality objective.
Schemes that add traffic, parking or combustion plant are assessed against the area's action plan and may need an air quality assessment.
Council record ↗
Also on the record
Conservation area 79 m away: Thorburn Square; Inside the Southwark built-up area.
Not affected
Not green belt · No listed building at the site · No scheduled monument at the site

Checked on 11 September 2026. Historic England, the Environment Agency, Natural England and council datasets, Open Government Licence. A boundary can run through a site and the council holds the definitive record: confirm with the council before relying on this.

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Other new applications on this street

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Important details

Council
Southwark
Application type
Householder Application
Postcode
SE1 5BL
Received
12 Aug 2026
Validated
3 Sept 2026
Ward
South Bermondsey
Parish
Bermondsey And Rotherhithe
Case officer
Show
Target decision
28 Oct 2026
Applicant
Show
Agent
Studio H-j

Decision outlook

Day 9 of the 56-day target. Southwark usually decides extensions by day 51.

Day 947 days to the 56-day target
78%decided within 8 weeks
94%approved
95%go to committee

Plota live figures for extensions decided by Southwark in the last twelve months, from validation. Southwark decision record →

Public comments

No public comments yet.

Last counted 11 Sept 2026

Read the comments on the council site ↗

Consultation & key dates

Statutory expiry
28 Oct 2026
Env. assessment
No

Historical activity at this location

25 nearby applications on record - archival context, not part of the live application.

Within ~100m

Nearby activity

2024 Approved
12 Strathnairn Street London Southwark SE1 5BL
Retrospective demolition of existing two-storey end of terrace house and construction of…
24/AP/1490
2023 Approved
163 Simms Road London Southwark SE1 5QJ
Construction of rear single storey side extension, with the addition of a roof lantern.
23/AP/1018
2022 Approved
10 Strathnairn Street London Southwark SE1 5BL
Construction of a ground floor rear extension and the installation of a roof light.
22/AP/3285
2022 Approved
42 Trothy Road London Southwark SE1 5RR
Construction of a two storey side extension, single storey rear extension and rear dormer…
22/AP/1737
2022 Approved
10 Strathnairn Street London Southwark SE1 5BL
Construction of a part single storey part two storey extension to the rear and the instal…
22/AP/1542
2022 Approved
28 Trothy Road London Southwark SE1 5RR
Construction of single storey front and rear extension, refuse bins and electric vehicle…
22/AP/1208
2021 Approved
12 Strathnairn Street London Southwark SE1 5BL
Construction of single storey ground floor rear extension complete with two roof lights…
21/AP/3796
2021 Approved
183 Simms Road London Southwark SE1 5LP
Construction of a single storey rear extension (to replace the existing) and the installa…
21/AP/3573
2021 Approved
12 Strathnairn Street London Southwark SE1 5BL
Hip to gable roof extension and rear dormer roof extension.
21/AP/3798
2021 Approved
1,2,5,9 And 10 Hannah Mary Way, SE1 5QG 1,2,3 And 5 Langdon Way, SE1 5QN 1 And 2 Kotree Way, SE1 5DA 31, 33, 37 And 41 Monnow Road, SE1 5RQ 50, 52, 54, 64 And 66 Monnow Road, SE1 5RQ
Replacement of all windows, fascias, soffits and barge boards, (where applicable).
21/AP/2643
2021 Approved
183 Simms Road London Southwark SE1 5LP
Constrution of rear dormer extension including Juliette Balcony and 1x rooflight to the f…
21/AP/2494
2021 Withdrawn
42 Trothy Road London Southwark SE1 5RR
Construction of a double storey side extension, double storey rear extension and rear dor…
21/AP/1541
2020 Approved
200 St Jamess Road London Southwark SE1 5LN
The construction of a two storey side extension, a single storey rear extension and two r…
20/AP/2474
2020 Approved
38 Strathnairn Street London Southwark SE1 5BL
The construction of a single storey rear extension; the addition of a Juliet balcony and…
20/AP/2230
2019 Approved
177 Simms Road London Southwark SE1 5LP
Construction of a single storey porch extension and the cladding of the side window.
19/AP/7520
2019 Approved
18 Strathnairn Street London Southwark SE1 5BL
Replacement windows with white PVC frames; new first floor level front window.
19/AP/7281
2019 Approved
161 Simms Road London Southwark SE1 5QJ
Demolition of existing single storey rear extension and construction of part one/part two…
19/AP/5716
2019 Approved
200 St Jamess Road London Southwark SE1 5LN
Construction of a two-storey side extension to the dwelling house with two dormer windows…
19/AP/5737
2019 Withdrawn
8 Trothy Road London SE1 5RR
Construction of a rear dormer extension with one bedroom, installing two skylight windows…
19/EQ/0171
2019
8 TROTHY ROAD, LONDON, SE1 5RR
Construction of a rear dormer extension with one bedroom, installing two skylight windows…
19/AP/2301
2018 Approved
163 Simms Road London SE1 5QJ
Construction of a two-storey extension to the side and rear of the existing rear outrigge…
18/AP/2692
2017 Approved
34 Trothy Road London SE1 5RR
Retention of rear dormer extension with juliette balcony and three rooflights in the fron…
17/AP/1642
2017 Withdrawn
34 TROTHY ROAD, LONDON, SE1 5RR
Construction of a rear dormer extension.
17/AP/2073
2017 Approved
27 Strathnairn Street London SE1 5BN
Lawful development certificate for a proposed development for the erection of a rear dorm…
17/AP/0158
2016 Approved
19 Trothy Road London SE1 5RR
Construction of a single storey rear extension.
16/AP/4609
Southwark
Planning Authority Score
7/10
Good
#64 of 296 councils
Relevant to this application:
Householder decisions

Southwark is faster than most councils at deciding householder applications, ranking #54 out of 296. Householder applications are slightly more likely to be approved here (95%) than the national average (90%).

Faster than most councils
for householder decisions
These figures are council-wide context, not a prediction for this application. View full council performance
Southwark decision statistics
Based on MHCLG data, the year to March 2026
92%
Overall approval rate
Above avg (87%) #93 of 296
95%
Householder approved
Above avg (90%) #92 of 296
78%
Decided in 8 weeks
Above avg (63%) #54 of 296
37%
Extended time limit
Below avg (41%) #122 of 296
92%
Minor dwellings approved
259 decided (1-9 homes)
86%
Major dwellings approved
14 decided (10+ homes)
82%
Change of use approved
38 decided
1,622
Total decisions
132 refused in the year to March 2026
Source: MHCLG planning statistics · See full council rankings