15 Colnbrook Street London Southwark SE1 6EZ Data via plota.co.uk

26/AP/1115 - Listed Building Consent Awaiting decision

Proposal

Listed building consent for the first-floor rear extension to existing outrigger; lowering & reinstatement of front parapet entablature; repair and re-glazing of existing windows; replacement of rear basement window with French doors; installation of Air Source Heat Pump and building services upgrades; associated internal alterations, repairs, and landscaping. (Revised description) Data via plota.co.uk

View original council record ↗Last checked

Application progress

Received
20 Apr 2026
Validated
5 May 2026
Decision
Expected by 4 Sept 2026

This application is under consideration - no decision has been issued yet. Plota predicted a decision around 14 Sept 2026; it is now day 132.

Documents 29

Plans & drawings 14

PDF 421-SE1 6EZ-URB-ZZ-XX-DR-A-2000-PL1-R10 SITE PLAN PROPOSED Plan - Amended · 9 Jul 2026 View ↗ PDF 421-SE1 6EZ-URB-ZZ-XX-DR-A-2000-PL1-R10 PLANS PROPOSED GROUND, BASEMENT, FIRST Plan - Amended · 9 Jul 2026 View ↗ PDF 421-SE1 6EZ-URB-ZZ-XX-DR-A-2000-PL1-R10 PLANS PROPOSED ROOF, SECOND Plan - Amended · 9 Jul 2026 View ↗ PDF 421-SE1 6EZ-URB-ZZ-XX-DR-A-2000-PL1-R10 ELEVATIONS PROPOSED E-01 STREETSCAPE ELEVATION Plan - Amended · 9 Jul 2026 View ↗ PDF 421-SE1 6EZ-URB-ZZ-XX-DR-A-2000-PL1-R10 ELEVATIONS PROPOSED E-02 ELEVATION Plan - Amended · 9 Jul 2026 View ↗ PDF 421-SE1 6EZ-URB-ZZ-XX-DR-A-2000-PL1-R10 ELEVATIONS PROPOSED E-03 ELEVATION, ELEVATION Plan - Amended · 9 Jul 2026 View ↗ PDF 421-SE1 6EZ-URB-ZZ-XX-DR-A-2000-PL1-R10 SECTIONS PROPOSED BUILDING SECTION Plan - Amended · 9 Jul 2026 View ↗ PDF 421-SE1 6EZ-URB-ZZ-XX-DR-A-2000-PL1-R10 SECTIONS PROPOSED BUILDING SECTION Plan - Amended · 9 Jul 2026 View ↗ PDF 421-SE1 6EZ-URB-ZZ-XX-DR-A-2000-PL1-R10 INTERNAL ELEVATIONS PROPOSED BASEMENT Plan - Amended · 9 Jul 2026 View ↗ PDF 421-SE1 6EZ-URB-ZZ-XX-DR-A-2000-PL1-R10 INTERNAL ELEVATIONS PROPOSED GROUND Plan - Amended · 9 Jul 2026 View ↗ PDF 421-SE1 6EZ-URB-ZZ-XX-DR-A-2000-PL1-R10 INTERNAL ELEVATIONS PROPOSED FIRST Plan - Amended · 9 Jul 2026 View ↗ PDF 421-SE1 6EZ-URB-ZZ-XX-DR-A-2000-PL1-R10 INTERNAL ELEVATIONS PROPOSED SECOND Plan - Amended · 9 Jul 2026 View ↗ PDF ENG-2509-SK-01 REV P6 OUTLINE SERVICES DESIGN - BASEMENT & GROUND FLOORS Plan - Amended · 9 Jul 2026 View ↗ PDF ENG-2509-SK-02 REV P6 OUTLINE SERVICES DESIGN - FIRST & SECOND FLOORS Plan - Amended · 9 Jul 2026 View ↗

All documents on the council site ↗

Site constraints 10

Grade II listed: Numbers 2-18 and Attached Railings
List entry 1385430 · 29 m from the pin · 9 more listed buildings within 150 m (9 Grade II)
Listed building consent is needed for work that affects the special interest of a listed building, inside or out, on top of planning permission. Setting can be a consideration for buildings nearby; there is no fixed radius.
Show the other 9 with distances
Historic England ↗
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 ↗
West Square conservation area
Demolition needs planning permission and permitted development is restricted.
The council must give weight to preserving or enhancing the area's character and appearance. Not every council has published its boundaries as open data.
Council document ↗
2 Article 4 directions
Central Activities Zone · Elephant and Castle Major Town Centre. Named permitted development rights are withdrawn here.
An Article 4 direction withdraws particular permitted development rights, so work that would normally need no application needs one here. Not every council has published its directions.
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 ↗
Town centre: Elephant and Castle/ Walworth Road
A designated centre in the London Plan.
Shops, services and active frontages are protected in centres, and main town centre uses are steered here first.
Habitat network: Network Enhancement Zone 2
Where habitat is joined up enough to work as a network. Context, not a constraint on its own.
Central activities zone
The core of central London in the London Plan.
Offices, culture and the other strategic functions of the centre take priority over new housing here.
Opportunity area
Where the London Plan expects significant growth.
Boundaries are indicative and the borough holds the detailed plan.
Also on the record
Inside the Southwark built-up area.
Not affected
Not green belt · 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.

Work with planning data?

Every application in Southwark - and every UK council - as a live feed, an API, or a bulk CSV export.

About Plota's data service

Important details

Council
Southwark
Application type
Listed Building Consent
Postcode
SE1 6EZ
Received
20 Apr 2026
Validated
5 May 2026
Ward
St Georges
Parish
Borough, Bankside And Walworth
Case officer
Show
Target decision
4 Sept 2026
Applicant
Show
Agent
Urbanist Architecture

Decision outlook

Day 132, past the statutory target. 92% of listed building works in Southwark are decided within thirteen weeks; extensions of time are common, and the council need not decide on the day. Last seen undecided on 12 Sept 2026.

Day 13276 days past the 56-day target
69%decided within 8 weeks
92%approved
112decided in the last year

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

Public comments

6comments received
6 objecting

100% object · above the UK average of 75%

Last counted 12 Sept 2026

Read the comments on the council site ↗

Consultation & key dates

Statutory expiry
29 Jun 2026
Env. assessment
No
Southwark
Planning Authority Score
7/10
Good
#64 of 296 councils
Relevant to this application:
Other 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