103 St George's Square Mews London SW1V 3RZ Data via plota.co.uk

26/05346/CLOPUD - Certificate of Lawfulness (proposed) Approved
Extensions & alterations

Proposal

Installation of three painted timber sash windows within new openings to the rear elevation. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
6 Aug 2026
✓
Approved
7 Sept 2026

Approved on 7 Sept 2026 · Delegated Decision · Last checked 15 Sept 2026

Documents 11

Decision & officer reports 2

PDF GRANT OF CLOPUD [PE] Decision Notice · 7 Sept 2026 View ↗ PDF DELEGATED REPORT Report · 7 Sept 2026 View ↗

Plans & drawings 5

PDF LOCATION PLAN Location Plan · 6 Aug 2026 View ↗ PDF FLOOR PLANS - AS EXISTING Drawing · 6 Aug 2026 View ↗ PDF SECTION B-B & REAR ELEVATION - AS EXISTING Drawing · 6 Aug 2026 View ↗ PDF FLOOR PLANS - AS PROPOSED Drawing · 6 Aug 2026 View ↗ PDF SECTION B-B & REAR ELEVATION - AS PROPOSED Drawing · 6 Aug 2026 View ↗

Application forms 2

PDF APPLICATIONFORMREDACTED Application Form · 6 Aug 2026 View ↗ PDF FEECALCULATION Background Papers · 6 Aug 2026 View ↗

Other documents 2

PDF ACK-GENERAL LETTER (G/P/C) Background Papers · 13 Aug 2026 View ↗ PDF RECEIPT OF APPLICATION Other · 11 Aug 2026 View ↗

All documents on the council site ↗

Site constraints 12

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 ↗
Pimlico 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 ↗
Article 4 direction
Article 4 Basement Development Permitted Rights Removed. Named permitted development rights are withdrawn here.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.
National infrastructure project: Thames Tideway Tunnel
The site is inside 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, 22 m).
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 ↗
Archaeological priority area: City of Westminster APA 3.2
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: Westminster 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 ↗
10 listed buildings within 150 m
Nearest: 89-105, St George's Square Sw1, Grade II, 2 m away · 10 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 10 with distances
Historic England ↗
Registered park or garden 37 m away: St George's Square Garden
Its setting is a consideration for work nearby.
Registered parks and gardens, battlefields, world heritage sites and protected wrecks are designated heritage assets: harm needs clear and convincing justification.
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.
Also on the record
Inside the City of Westminster built-up area; Public transport access: PTAL 4 (good), TfL 2023, for the 100 m square; Priority habitat 37 m away: Deciduous woodland.
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.

Sales history 2

Last sold for £1,190,000 in September 2024. Terraced house, freehold.

16 September 2024£1,190,000
18 October 2005£600,000

Sale prices from HM Land Registry's price paid record, matched to this application by its address.

Building

Floor area83 m² (893 sq ft)
Energy ratingD (65 out of 100), could reach B
PropertyMid-terrace house, 6 habitable rooms
Built1900 to 1929
HeatingBoiler and radiators, mains gas
WallsSolid brick, as built, no insulation (assumed)

From the energy performance certificate lodged in January 2022, the latest held for this property. The building may have changed since. View the certificate

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Important details

Council
Westminster
Application type
Certificate of Lawfulness (proposed)
Postcode
SW1V 3RZ
Received
6 Aug 2026
Validated
6 Aug 2026
Ward
Pimlico South
Case officer
Show
Target decision
1 Oct 2026
Decision
Application Permitted
Decision date
7 Sept 2026
Decision level
Delegated Decision
Applicant
Show
Agent
Steven Atkin Architects

How this decision compares

Decided in 32 days from validation, 23 days faster than Westminster's median of 55 for extensions. Approved, as 88% of extensions here are.

56%decided within 8 weeks
88%approved
1,688decided in the last year

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

Public comments

No public comments yet.

Last counted 15 Sept 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-15093082
Planning Portal ref
PP-15093082
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
Flat 12 89 - 91 St George's Square London SW1V 3QW
Replacement of the fifth floor terrace sliding patio doors with bi-fold doors and the ins…
25/06565/LBC
2025
Flat 12 89 - 91 St George's Square London SW1V 3QW
Replacement of the fifth floor terrace sliding patio doors with bi-fold doors and the ins…
25/06564/FULL
2025 Approved
53D Aylesford Street SW1V 3RY
Replacement windows at second floor level to front elevation.
25/04900/FULL
2025 Approved
93 St George's Square London SW1V 3QW
Replacement of front door and door frame.
25/03982/LBC
2025 Approved
93 St George's Square London SW1V 3QW
Replacement of front door and door frame.
25/03981/FULL
2025
73 St George's Square London SW1V 3QW
T1: Sycamore - Remove two lowest limbs growing out over garden to reduce excessive?shadin…
25/02260/TCA
2025
93 St George's Square London SW1V 3QW
Replacement of the front door. (Linked with 25/00842/FULL)
25/00843/LBC
2025
93 St George's Square London SW1V 3QW
Replacement of the front door. (Linked with 25/00843/LBC)
25/00842/FULL
2024
93 St George's Square London SW1V 3QW
Internal alterations to ground and first floor flat (part retrospective).
24/05154/LBC
2024
121 St George's Square London SW1V 3QP
Extension of mansard roof form to the front and rear elevations plus associated external…
24/02586/LBC
2024
121 St George's Square London SW1V 3QP
Extension of mansard roof form to the front and rear elevations plus associated external…
24/02585/FULL
2023 Approved
77 St George's Square London SW1V 3QW
Replacement of the existing pipework in the basement vaults and basement lightwells of 77…
23/08618/LBC
2023 Approved
77 St George's Square London SW1V 3QW
Replacement of the existing pipework in the basement vaults and basement lightwells of 77…
23/08617/FULL
2023
37 Aylesford Street London SW1V 3RY
Installation of one large balcony instead of two separate balconies and two new timber fu…
23/07901/FULL
2023
Malcolmson House Aylesford Street London SW1V 3RP
Replacement of double-glazed steel-framed windows and balcony glazed doors with double-gl…
23/05434/FULL
2023
97 St George's Square London SW1V 3QP
Alterations to create a self contained residential flat at third floor level (Flat E) (Li…
23/05375/LBC
2023
97 St George's Square London SW1V 3QP
Alterations to create a self contained residential flat at third floor level (Flat E) (Li…
23/05374/FULL
2023 Approved
103 St George's Square London SW1V 3QP
Installation of lead capping to the front elevation parapet walls, window pediments and c…
23/01566/LBC
2022
Flat 3 83 St George's Square London SW1V 3QW
Replacement external windows and doors with double glazed timber windows and door. (Linke…
22/07637/LBC
2022
Flat 3 83 St George's Square London SW1V 3QW
Replacement external windows and doors with double glazed timber windows and door. (Linke…
22/07636/FULL
2016 Withdrawn
93 St George's Square London SW1V 3QW
Internal alteration including insertion of internal stair between first and second floors…
16/07233/LBC
2016 Approved
83 St George's Square Mews London SW1V 3RZ
Conversion of a garage into living accommodation and the subdivision of the property to f…
16/04001/FULL
2016 Approved
Ground Floor Flat 117 St George's Square London SW1V 3QP
Internal alterations.
16/05652/LBC
2016 Approved
101A St George's Square London SW1V 3QP
Erection of rear courtyard extension in connection with reconfiguration of lower ground f…
16/02974/LBC
2016 Approved
101A St George's Square London SW1V 3QP
Erection of rear courtyard extension in connection with reconfiguration of lower ground f…
16/02973/FULL
Westminster
Planning Authority Score
3.5/10
Below average
#221 of 296 councils
Relevant to this application:
Householder decisions

Westminster is slower than most councils at deciding householder applications, ranking #258 out of 296. Only 28% of applications have the time limit extended, well below the 41% national average - the council usually decides on time. Westminster is also one of the strictest councils - it refuses more householder applications than almost any other, with only 81% approved vs 90% nationally.

One of the strictest councils
only 81% approved vs 90% nationally
These figures are council-wide context, not a prediction for this application. View full council performance
Westminster decision statistics
Based on MHCLG data, the year to March 2026
86%
Overall approval rate
Below avg (87%) #201 of 296
81%
Householder approved
Below avg (90%) #277 of 296
44%
Decided in 8 weeks
Below avg (63%) #258 of 296
28%
Extended time limit
Below avg (41%) #46 of 296
83%
Minor dwellings approved
12 decided (1-9 homes)
67%
Major dwellings approved
3 decided (10+ homes)
81%
Change of use approved
133 decided
4,602
Total decisions
648 refused in the year to March 2026
Source: MHCLG planning statistics · See full council rankings

Sale prices: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.

Freehold boundary: © Crown copyright and database rights 2026, HM Land Registry. Polygons © Crown copyright and database rights 2026 Ordnance Survey 100026316. Conditions of use

Energy performance: Energy performance certificates from the Energy Performance of Buildings Register, Ministry of Housing, Communities and Local Government. Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright 2026.