9 Mount Row London W1K 3RG Data via plota.co.uk

26/03884/FULL - Full Planning Permission Application Pending
Extensions & alterations

Proposal

Installation of external feature lighting additions to front facade of terraced dwellinghouse; and other associated works. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
12 Jun 2026
✓
Validated
14 Jul 2026
Decision
Expected by 8 Sept 2026

This application is under consideration - no decision has been issued yet. Plota predicted a decision around 5 Oct 2026; it is now day 83. The consultation period closed on 2 Sept 2026.

Documents 11

Statements & assessments 3

PDF HERITAGE STATEMENT Heritage Statement · 15 Jun 2026 View ↗ PDF SUSTAINABILITY STATEMENT Background Papers · 15 Jun 2026 View ↗ PDF DESIGN ACCESS STATEMENT Design and Access Statement · 12 Jun 2026 View ↗

Plans & drawings 4

PDF LOCATIONPLAN Drawing · 12 Jun 2026 View ↗ PDF EXISTING AND PROPOSED FRONT FACADE LIGHTING OPTION A Drawing · 12 Jun 2026 View ↗ PDF EXISTING AND PROPOSED FRONT FACADE LIGHTING OPTION B Drawing · 12 Jun 2026 View ↗ PDF EXISTING AND PROPOSED FRONT FACADE LIGHTING OPTION C Drawing · 12 Jun 2026 View ↗

Application forms 1

PDF APPLICATIONFORMREDACTED Application Form · 12 Jun 2026 View ↗

Other documents 3

PDF RECEIPT OF APPLICATION Other · 15 Jun 2026 View ↗ PDF 1ST INVALID LETTER Background Papers · 15 Jun 2026 View ↗ PDF SITELOCATION Background Papers · 12 Jun 2026 View ↗

All documents on the council site ↗

Site constraints 9

Grade II listed: 2-8, Carlos Place W1
List entry 1066348 · 25 m away · 27 more listed buildings within 150 m (4 Grade II*, 23 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 27 with distances
Historic England ↗
Mayfair 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 Named permitted development rights are withdrawn here.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.
Archaeological priority area: City of Westminster APA 2.5
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 ↗
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
Registered park or garden 137 m away: Grosvenor Square; Inside the City of Westminster built-up area; Town centre 90 m away: West End.
Not affected
Outside flood zones 2 and 3 · 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.

Sales history 4

Last sold for £10,300,000 in November 2025. Terraced house, freehold.

26 November 2025£10,300,000
10 April 2024£5,400,000Recorded as a transfer outside a standard sale
13 September 2018£6,950,000Recorded as a transfer outside a standard sale
20 April 2007£694,000

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

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Important details

Council
Westminster
Application type
Full Planning Permission Application
Postcode
W1K 3RG
Received
12 Jun 2026
Validated
14 Jul 2026
Ward
West End
Case officer
Show
Target decision
8 Sept 2026
Applicant
Show
Agent
Brahma London Ltd

Decision outlook

Day 83, past the statutory target. 84% of extensions in Westminster are decided within thirteen weeks, which runs to 13 Oct 2026; extensions of time are common, and the council need not decide on the day. Last seen undecided on 3 Oct 2026.

Day 8327 days past the 56-day target
56%decided within 8 weeks
88%approved
1,673decided in the last year

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

Public comments

1comment received
1 supporting

33 neighbours consulted · Last counted 3 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-15007927
Comments by
2 Sept 2026
Site or press notice
12 Aug 2026
Env. assessment
No

Historical activity at this location

29 previous applications on record - archival context, not part of the live application.

This property

Previous applications at this address

2024 Approved
Installation of air conditioning condensers on the flat/mansard roof above 3rd floor leve…
24/04704/FULL
2024 Approved
Details of photographic schedule of samples of the facing materials pursuant to Condition…
24/04671/ADFULL
2024
Proposed minor extension/alteration to rear elevation at 1st floor level
24/04550/FULL
2024
Erection of a first floor rear in-fill extension; alteration to ground floor rear fenestr…
24/01299/FULL
Within ~100m

Nearby activity

2025
Penthouse A 21 Davies Street London W1K 3DE
Replacement of all windows and doors, including their frames, on the upper level (6th flo…
25/07862/FULL
2025 Approved
Third Floor And Fourth Floor Rear 128 Mount Street London W1K 3NU
Replacement of existing access hatch, ladder and internal loft with an Automatic Opening…
25/05410/FULL
2025
119 Mount Street London W1K 3NL
Internal alterations at ground and lower ground floor levels associated within fit-out of…
25/07561/LBC
2025
5 Mount Street London W1K 3NE
External alterations including the removal of existing plant equipment and installation o…
25/07581/LBC
2025
5 Mount Street London W1K 3NE
External alterations including the removal of existing plant equipment and installation o…
25/07580/FULL
2025
Connaught Hotel Carlos Place London W1K 2AL
Display of one externally illuminated Christmas tree and decorations measuring 10m x 4m.
25/07549/ADV
2025 Refused
5 Mount Street London W1K 3NE
Installation of retractable awnings; removal of existing plant equipment and installation…
25/05647/FULL
2025 Refused
5 Mount Street London W1K 3NE
Installation of retractable awnings; removal of existing plant equipment and installation…
25/05648/LBC
2025
35 Berkeley Square London W1J 5BF
Formation of new office at ground floor level including replacement of front steps along…
25/07217/LBC
2025 Approved
Third Floor And Fourth Floor Rear 128 Mount Street London W1K 3NU
Replacement of existing access hatch, ladder and internal loft with an Automatic Opening…
25/05411/LBC
2025 Approved
9 Carlos Place London W1K 3AT
Installation of two ASHP units located in the ground floor rear courtyard area within an…
25/04492/FULL
2025
120 Mount Street London W1K 3NN
Raise existing ground-level timber floor boards in order to clear the void before install…
25/05811/LBC
2025
Flat 2 49 Grosvenor Square London W1K 3EP
Installation of two air condenser units at roof level and two ventilation grills in rear…
25/05833/FULL
2025 Approved
119 Mount Street London W1K 3NL
Internal alterations for adaptation to existing building services at ground and lower gro…
25/04597/LBC
2025 Withdrawn
Basement And Ground Floor 5 Mount Street London W1K 3NE
Replacement of existing plant equipment to the rear external lightwell; fascia, hanging a…
25/03732/LBC
2025 Withdrawn
Basement And Ground Floor 5 Mount Street London W1K 3NE
Replacement of existing plant equipment to the rear external lightwell and internal and e…
25/03731/FULL
2025 Approved
Basement And Ground Floor 5 Mount Street London W1K 3NE
Display of one internally illuminated fascia signs measuring 1.70m x 0.11m, and one inter…
25/03729/ADV
2025
Basement And Ground Floor Rear 127 Mount Street London W1K 3NT
Installation of air conditioning units within the rear lightwells; erection of an extract…
25/02531/LBC
2025
127 Mount Street London W1K 3NT
Variation of condition 1 of planning permissiond ated 8th May 2024 (RN 23/04885/FULL) for…
25/02255/FULL
2025
Basement And Ground Floor 9 Mount Street London W1K 3NG
Installation of external air conditioning unit to rear elevation. (Retrospective) Linked…
25/01321/FULL
2019 Refused
51 Grosvenor Street London W1K 3HH
Internal works including the installation of a partition wall in rear ground floor room
19/08154/LBC
2020 Approved
27 Farm Street London W1J 5RJ
Erection of a single storey extension, creation of a new step-free office entrance, exter…
20/01610/FULL
2020 Approved
Ground Floor 120A Mount Street London W1K 3NN
Internal alterations at ground floor level.
20/02189/LBC
2020 Approved
120A Mount Street London W1K 3NN
Display of one non illuminated fascia sign measuring 0.7m x 4.4m, two internally illumina…
20/02182/ADV
2020 Approved
49 Grosvenor Square London W1K 3EP
Replacement of external entrance steps in Portland Stone to match existing.
20/01454/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