17 Belgrave Square London SW1X 8PG

26/03054/FULLFull Planning Permission ApplicationApproved

Full

Approved on 7 July 2026

Site boundary (council red line)

Proposal

Reconfiguration and alteration of the area between the main building and the Mews, including the erection of a pergola structure, alterations to the rear annex openings, updated rear garden layout.

Received: 8 May 2026
Council: City of Westminster
Ward: Knightsbridge & Belgravia
Agent: Montagu Evans LLP

ReceivedReceived8 May
ValidatedValidated15 May
Consult.Consultation
TargetTarget Date10 Jul
DecidedDecided7 Jul

Decided in 53 days (council typically 49)

About this application

This is a full planning application at 17 Belgrave Square London SW1X 8PG. Westminster has handled 4,484 applications of this type. This one was decided in 60 days, 11 days longer than Westminster's typical decision time. The site is in the Belgravia conservation area, with 11 listed buildings nearby. There have been 14 other applications at this address. In the past year there have been 380 applications across Knightsbridge & Belgravia. We hold 1,289 applications in total for the SW1X postcode area.

86% of full applications at City of Westminster were approved. Across all application types, the council typically decides in about 7 weeks (median).

Based on decided applications received in the last 3 years.Planning something similar? See what gets approved on your street

Application details

Postcode: SW1X 8PG
Application type: Full Planning Permission Application
Scale / size: Small

Planning application dates

Date validated: 15 May 2026
Consultation expiry: 24 June 2026
Target decision date: 10 July 2026

Applicant and agent

Agent: Montagu Evans LLP
Agent address: 70 St Mary Axe London EC3A 8BE United Kingdom

Planning decision

Statutory period: 56 days

Publicity

Last advertised: 3 June 2026
Advertisement expiry: 24 June 2026

Additional information

Planning Portal ID: PP-14921057
Comments: 0
Documents: 51

Site constraints

Checking the site

2/3

Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

Conservation area: Belgravia
Listed building: Grade I: 13-23, Belgrave Square Sw1On or next to this site
Article 4 direction: Article 4 Basement Development Permitted Rights Removed
Flood zone 1: Low probability (rivers and sea)

Also checked, none recorded (21)

flood storage areas, tree preservation orders, green belt, scheduled monuments, World Heritage Sites, World Heritage Site buffer zones, registered parks and gardens, registered battlefields, Heritage at Risk entries, nutrient neutrality catchments, national parks, National Landscapes, SSSIs, Special Areas of Conservation, Special Protection Areas, Ramsar sites, ancient woodland, national nature reserves, local nature reserves, heritage coasts and brownfield registers.

A guide only, from official open data; it is not a planning search. Flood zones cover rivers and sea, not surface water.

Data © Crown copyright and others · sources and licences

Contains public sector information from planning.data.gov.uk (MHCLG and local planning authorities), licensed under the Open Government Licence v3.0. © Crown copyright and database right 2026.

© Historic England 2026. Contains Ordnance Survey data © Crown copyright and database right 2026. The Historic England GIS Data contained in this material was obtained on 2026-11-03. The most publicly available up to date Historic England GIS Data can be obtained from HistoricEngland.org.uk.

Contains Ordnance Survey data © Crown copyright and database right 2026.

Source: Office for National Statistics licensed under the Open Government Licence v.3.0. Contains OS data © Crown copyright and database right 2026.

Associated applications

2026
8 May
Removal of Condition 10 of listed building consent dated 18th August 2025 (RN:25/03417/LBC
ApprovedListed building consentFiled alongside26/03051/LBC
2026
8 May
Detailed drawings showing the roof top acoustic enclosure shall be painted light grey pursuant to condition 6…
ApprovedDischarge of conditionsFiled alongside26/03052/ADFULL
2026
8 May
Details of the elevations and sections of the new windows (scaled 1:10) showing integral glazing bars and of…
ApprovedDischarge of conditionsFiled alongside26/03053/ADFULL
2026
8 May
Reconfiguration and alteration of the area between the main building and the Mews, including the erection of…
This applicationApprovedFull26/03054/FULL
2026
8 May
Detailed drawings showing the roof top acoustic enclosure shall be painted light grey pursuant to condition…
ApprovedDischarge of conditionsFiled alongside26/03058/ADLBC
2026
8 May
detailed drawings at a scale of 1:10 and sections at 1:5 of Windows, Doors, Garage Doors, which should appear…
ApprovedDischarge of conditionsFiled alongside26/03059/ADLBC

Planning history at this site

17 other applications at this property, newest first.

Source: Westminster

Contains public sector information from the Planning London Datahub, licensed under the Open Government Licence v3.0.

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