10 - 18 Union Street London Southwark SE1 1SZ Data via plota.co.uk

26/AP/1894 - Minor application Approved
Extensions & alterations

Proposal

Replacement windows and doors to Union Street (South elevation). Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
30 Jun 2026
✓
Validated
1 Jul 2026
✓
Approved
21 Aug 2026

Approved on 21 Aug 2026 · Delegated Panel - Simple · Last checked 22 Aug 2026

Documents 17

Decision & officer reports 7

PDF 1700 REV P1 EXISTING & PROPOSED GROUND FLOOR PLAN Decision - Plans · 30 Jun 2026 View ↗ PDF 1701 REV P1 EXISTING & PROPOSED FIRST FLOOR PLAN Decision - Plans · 30 Jun 2026 View ↗ PDF 1702 REV P1 EXISTING & PROPOSED SECOND FLOOR PLAN Decision - Plans · 30 Jun 2026 View ↗ PDF 1703 REV P1 EXISTING & PROPOSED THIRD FLOOR PLAN Decision - Plans · 30 Jun 2026 View ↗ PDF 1704 REV P1 EXISTING & PROPOSED FOURTH FLOOR PLAN Decision - Plans · 30 Jun 2026 View ↗ PDF 1705 REV P1 EXISTING & PROPOSED ROOF PLAN Decision - Plans · 30 Jun 2026 View ↗ PDF 1750 REV P1 EXISTING & PROPOSED SOUTH ELEVATION Decision - Plans · 30 Jun 2026 View ↗

Statements & assessments 3

PDF DESIGN AND ACCESS STATEMENT Design and Access statement · 30 Jun 2026 View ↗ PDF HERITAGE STATEMENT Heritage statement · 30 Jun 2026 View ↗ PDF REASONABLE EXCEPTION STATEMENT Fire Statement · 30 Jun 2026 View ↗

Plans & drawings 2

PDF 1001 REV P1 SITE PLAN Site - Block plan · 30 Jun 2026 View ↗ PDF 3600 REV P1 PROPOSED TYPICAL WINDOW DETAIL Plan - Proposed · 30 Jun 2026 View ↗

Application forms 1

PDF APPLICATION FORM - WITHOUT PERSONAL DATA Application - Form (Without Personal data) · 30 Jun 2026 View ↗

Consultation & comments 1

PDF FILE COPY - NEIGHBOUR NOTIFICATION+LIST Neighbour Notification List · 17 Jul 2026 View ↗

Other documents 3

PDF PRESS NOTICE - 30/07/2026 Press Notice · 28 Jul 2026 View ↗ PDF VALID APPLICATION LETTER WITH INVOICE Valid Application Letter · 17 Jul 2026 View ↗ PDF SITE NOTICE Site notice · 16 Jul 2026 View ↗

All documents on the council site ↗

Site constraints 14

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 ↗
Borough High Street 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 ↗
3 Article 4 directions
Bankside and Borough District Town Centre · Protected shopping frontage SF8: Borough High Street · Central Activities Zone. 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.
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 ↗
National infrastructure project 277 m away: Thames Tideway Tunnel
The site is 277 m from the project boundary. Waste water treatment, decided. The project page says whether consent was granted. Also within 2 km: London Strategic Heat Main Project (at pre-application, the site is inside its boundary).
Nationally significant infrastructure projects (power stations, electricity lines, pipelines, major roads and railways, harbours, airports and reservoirs) are consented by a Secretary of State under the Planning Act 2008, after an examination by the Planning Inspectorate, rather than by the council. The boundary is the one the Inspectorate consults on and can change as the scheme does. Projects are shown within 2 km of the site.
Planning Inspectorate project page ↗
Town centre: Bankside and The Borough
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.
31 listed buildings within 150 m
Nearest: Wiltshire House, Maidstone Buildings, Grade II, 24 m away · 1 Grade II*, 28 Grade II
The site itself is not listed. 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 all 31 with distances
Historic England ↗
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
Wider setting of protected view 1A.2 Alexandra Palace viewing terrace to St Paul's Cathedral; Inside the Southwark built-up area; Public transport access: PTAL 6b (excellent), TfL 2023, for the 100 m square; Designated open space 21 m away.
Not affected
Not green belt · No scheduled monument at the site

Checked on 6 October 2026. Historic England, the Environment Agency, Natural England, the Planning Inspectorate, Transport for London (public transport access levels, Powered by TfL Open Data, OGL v3.0, contains OS data © Crown copyright and database right 2025) 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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Important details

Council
Southwark
Application type
Minor application
Postcode
SE1 1SZ
Received
30 Jun 2026
Validated
1 Jul 2026
Ward
Borough & Bankside
Parish
Borough, Bankside And Walworth
Case officer
Show
Target decision
25 Aug 2026
Decision
Minor - GRANTED
Decision date
21 Aug 2026
Decision level
Delegated Panel - Simple
Applicant
Show
Agent
Figure Ground Architects
Freehold owner
Show

How this decision compares

Decided in 51 days from validation, about the council's usual 51 days. Approved, as 93% of extensions here are.

75%decided within 8 weeks
93%approved
657decided in the last year

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

Public comments

No public comments yet.

24 neighbours consulted · Last counted 22 Aug 2026

Read the comments on the council site ↗

Consultation & key dates

Statutory expiry
25 Aug 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

2025 Approved
8 Union Street London Southwark SE1 1SZ
Replacement windows and doors throughout, and a side entrance door to provide level acces…
25/AP/3734
2025 Approved
Flat 11 Wiltshire House 2 Maidstone Buildings Mews London Southwark SE1 1GH
Proposed replacement of decking and installation of a gate and retention of an extended r…
25/AP/2413
2025 Approved
Flat 11 Wiltshire House 2 Maidstone Buildings Mews London Southwark SE1 1GH
Listed building consent for the replacement of decking and installation of a gate and the…
25/AP/2414
2025
Flat 13 Devon House 1 Maidstone Buildings Mews London Southwark SE1 1GE
Extension of existing top floor flat into the terrace, erection of adormer to the souther…
25/AP/1640
2025
6 Calverts Building And 4 Calverts Yard 52 Borough High Street Southwark SE1 1XN
Change of use of the existing commercial unit at No. 6 Calverts Yard its incorporation wi…
25/AP/0088
2024 Approved
Flat 11 Wiltshire House 2 Maidstone Buildings Mews London Southwark SE1 1GH
Converting a section of a hallway to form part of Flat 11. Alteration: Changing existing…
24/AP/1441
2023 Approved
Flat 12 Devon House 1 Maidstone Buildings Mews London Southwark SE1 1GE
Listed Building Consent for the adaption of an existing roof lantern to provide a new dor…
23/AP/0383
2023 Approved
Flat 12 Devon House 1 Maidstone Buildings Mews London Southwark SE1 1GE
Adaption of an existing roof lantern to provide a new dormer door to provide access to a…
23/AP/0382
2023 Approved
116-118 Borough High Street London Southwark SE1 1LB
Alterations to building entrance by reducing the recessed entry space and replacing the d…
23/AP/2991
2023 Approved
Tulip House 70 Borough High Street London Southwark
Replacement of windows with single glazed sash windows, new partitions & WCs at lower gro…
23/AP/1714
2022 Approved
Marlborough Playground 11 -25 Union Street London Southwark SE1 1SD
Redevelopment of site for the construction of two storey Cafe (Use Class E.b) with ancill…
22/AP/2071
2022 Approved
Calverts Building 52 Borough High Street London Southwark SE1 1XN
Listed Building Consent: Change of use of 3 Calverts Building from office (Class E) to a…
22/AP/4283
2023 Refused
Tulip House 70 Borough High Street London Southwark SE1
Listed Building Consent: Retrospective - Replacement of windows with slim timber frame do…
23/AP/0979
2022 Refused
84-86 Borough High Street London Southwark SE1 1LN
Installation of internally illuminated fascia and projecting sign.
22/AP/4368
2023 Approved
A M House 106-114 Borough High Street London Southwark SE1 1LB
The display of new internally illuminated fascia sign to the building.
23/AP/0138
2022 Approved
106-114 Borough High Street London Southwark SE1 1LB
Alterations to the brickwork/limestone cladding to east elevation, new louvered door to b…
22/AP/3613
2022
Calverts Building 52 Borough High Street London Southwark SE1 1XN
Change of use from office (Use Class E) to a single residential dwelling (Use Class C3)…
22/AP/4282
2022 Refused
1A Maidstone Buildings Mews 72-76 Borough High Street London Southwark SE1 1GD
Demolition and rebuild of first floor for Class E (office) use and the construction of a…
22/AP/0783
2022 Approved
Basement And Ground Floor 31 Union Street London Southwark SE1 1SD
Display of non illuminated fascia sign and internally illuminated projecting sign
22/AP/0823
2022 Approved
Tulip House 66-70 Borough High Street London Southwark SE1 1XF
Repainting of the shopfront, the addition of new signage, menu box, spotlights above the…
22/AP/1337
2018 Approved
Land Bounded By Southwark Street Redcross Way And Crossbones Graveyard London SE1
Request for a Screening Opinion for a proposed mixed-use development of up to 20,000sqm o…
18/AP/2272
2018 Approved
10-18 Union Street London SE1 1SZ
Refurbishment of the existing buildings, change of use to provide 85sqm (GIA) of flexible…
18/AP/1613
2017 Approved
Rear Of 2 And 3 Calverts Building 52 Borough High Street London SE1 1XN
Listed building consent for the construction of 5 residential units (1 townhouse and 4 ap…
17/AP/4184
2017 Withdrawn
90 Borough High Street London SE1 1LL
Change of use of the ground floor and basement from office (Use Class B1) to a flexible u…
17/AP/3393
2017 Approved
Tulip House 66-70 Borough High Street London SE1 1XF
Internal and external alterations associated with the change of use of part ground and ba…
17/AP/0750
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

Freehold owner: Information produced by HM Land Registry. © Crown copyright 2026. Source: HM Land Registry, UK and overseas companies that own property in England and Wales, September 2026 release.