7 Stratton Street London W1J 8LE Data via plota.co.uk

26/02336/ADFULL - Approval of Details (Full PP) Approved
Extensions & alterations

Proposal

Detailed drawings of all new balustrades, showing black metal railings, all new doors and windows to the rear facade and all replacement and new windows to the front elevation and detailed drawings showing dormer windows with integral glazing bars pursuant to conditions 4 and 6 of planning permission dated 24th July 2023 (RN: ). Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
9 Apr 2026
✓
Approved
30 Apr 2026

Approved on 30 Apr 2026 · Delegated Decision · Last checked 7 Jul 2026

Documents 17

Decision & officer reports 2

PDF APPR. OF DETAILS-FULL RESMAT [PE] Decision Notice · 30 Apr 2026 View ↗ PDF DELEGATED REPORT Report · 30 Apr 2026 View ↗

Plans & drawings 11

PDF BASEMENT WINDOWS Drawing · 9 Apr 2026 View ↗ PDF GROUND FLOOR WINDOWS DETAILS Drawing · 9 Apr 2026 View ↗ PDF PROPOSED FIRST FLOOR WINDOW DETAILS Drawing · 9 Apr 2026 View ↗ PDF FIRST FLOOR WINDOW BAY DETAIL Drawing · 9 Apr 2026 View ↗ PDF FIRST FLOOR WINDOWS DETAIL Drawing · 9 Apr 2026 View ↗ PDF PROPOSED SECOND FLOOR WINDOWS DETAIL Drawing · 9 Apr 2026 View ↗ PDF PROPOSED SECOND FLOOR WINDOWS DETAIL Drawing · 9 Apr 2026 View ↗ PDF THIRD FLOOR WINDOWS DETAIL Drawing · 9 Apr 2026 View ↗ PDF PROPOSED DORMER DETAIL Drawing · 9 Apr 2026 View ↗ PDF PROPOSED REAR WINDOW DETAIL Drawing · 9 Apr 2026 View ↗ PDF PROPOSED REAR DOOR DETAILS Drawing · 9 Apr 2026 View ↗

Application forms 1

PDF APPLICATION FORM REDACTED Application Form · 9 Apr 2026 View ↗

Other documents 3

PDF ACK-APPROVAL OF DETAILS APPL. Background Papers · 24 Apr 2026 View ↗ PDF RECEIPT OF APPLICATION ACKREC · 14 Apr 2026 View ↗ PDF ATTACHMENT SUMMARY Background Papers · 9 Apr 2026 View ↗

All documents on the council site ↗

Associated applications 4

Site constraints 13

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 ↗
2 Article 4 directions
Article 4 Basement Development Permitted Rights Removed · Article 4 Direction Class E To C3 In 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 Named permitted development rights are withdrawn here.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: 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 ↗
Town centre: West End
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.
34 listed buildings within 150 m
Nearest: 8, Stratton Street W1, Grade II, 3 m away · 3 Grade II*, 31 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 34 with distances
Historic England ↗
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.
National infrastructure project 914 m away: Thames Tideway Tunnel
The site is 914 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, 717 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 ↗
Registered park or garden 98 m away: Green Park
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 ↗
Also on the record
Inside the City of Westminster built-up area; Public transport access: PTAL 6b (excellent), TfL 2023, for the 100 m square; Metropolitan Open Land 81 m away.
Not affected
Outside flood zones 2 and 3 · 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 £6,400,000 in May 2025. Other property, freehold.

9 May 2025£6,400,000Recorded as a transfer outside a standard sale
31 January 2022£6,000,000Recorded as a transfer outside a standard sale

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

Building

Floor area339 m² (3,649 sq ft)
Energy ratingC (asset rating 73)
UseOffices and Workshop Businesses
HeatingHeating and Natural Ventilation

From the energy performance certificate lodged in October 2024, 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
Approval of Details (Full PP)
Postcode
W1J 8LE
Received
9 Apr 2026
Validated
9 Apr 2026
Ward
West End
Case officer
Show
Target decision
4 Jun 2026
Decision
Application Permitted
Decision date
30 Apr 2026
Decision level
Delegated Decision
Applicant
Show
Agent
Adderstone Projects Ltd
Freehold owner
Show

How this decision compares

Decided in 21 days from validation, 34 days faster than Westminster's median of 55 for extensions. Approved, as 88% of extensions here are.

56%decided within 8 weeks
88%approved
1,675decided in the last year

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

Consultation & key dates

Alt. reference
PP-14845957
Planning Portal ref
PP-14845957
Env. assessment
No

Historical activity at this location

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

This property

Previous applications at this address

2023
Erection of one additional floor at fifth floor level and infilling of rear lightwell fro…
23/05074/FULL
2016 Approved
Display for a temporary period of six months of a non-illuminated estate agent board atta…
16/08860/AD7
2016 Approved
Display for a temporary period of six months of a non-illuminated estate agent board atta…
16/01199/AD7
Within ~100m

Nearby activity

2025 Approved
60 Curzon Street London W1J 8PG
Installation of condenser units within basement lightwell 2.
25/05583/FULL
2025
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2025
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Display of internally illuminated hanging sign, menu box and metal lettering measuring 0…
25/07435/ADV
2025
80 Piccadilly London W1J 8HX
Installation of a new timber-framed glazed entrance door, new ribbed plaster cladding and…
25/07434/FULL
2025 Approved
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Installation of two replacement external ATM machines, and associated surround signage. (…
25/04213/LBC
2025 Approved
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Installation of two replacement external ATM machines, and associated surround signage. (…
25/04342/FULL
2025 Approved
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Installation of 7 air handling units located at rear ground floor roof level within the e…
25/03063/LBC
2025 Approved
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Installation of 7 air handling units located at rear ground floor roof level within the e…
25/03062/FULL
2025 Approved
51 Berkeley Street London W1J 8NL
Display of non illuminated ATM surround signage measuring 1.76m x 2.13m. (Linked with 25/…
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2025
Stratton House 5 Stratton Street London W1J 8LA
Replacement of roof plant, including internal refurbishment works at sixth floor. (Linked…
25/00408/LBC
2025
Stratton House 5 Stratton Street London W1J 8LA
Replacement of roof plant, including internal refurbishment works at sixth floor. (Linked…
25/00407/FULL
2024
Devonshire House Mayfair Place London W1J 8AJ
Proposed internal CAT A refurbishment to the second floor office, second floor common par…
24/08277/LBC
2024
Devonshire House Mayfair Place London W1J 8AJ
Office amenity terrace alterations and access improvements including a new glass balustra…
24/06628/LBC
2024
Devonshire House Mayfair Place London W1J 8AJ
Office amenity terrace alterations and access improvements including a new glass balustra…
24/06627/FULL
2023 Approved
14 Bolton Street London W1J 8BF
Formation of roof terrace at fourth floor rear and reconfiguration of plant area; replace…
23/00837/FULL
2023 Approved
51 Berkeley Street London W1J 8NL
Removal of the external left hand ATM machine to be replaced with a Smart ATM. (Linked wi…
23/08878/LBC
2023
51 Berkeley Street London W1J 8NL
Removal of the external left hand ATM machine to be replaced with a Smart ATM. (Linked wi…
23/08877/FULL
2023 Approved
Pitch 1667 Piccadilly London W1J 9DZ
Retention of a replacement retail kiosk (Class A1) on the public highway to the west of T…
23/04676/FULL
2023 Approved
10 Clarges Street London W1J 8AB
Use of ancillary office space (Use Class Sui Generis) at 3rd and 4th floors to self-conta…
23/06312/FULL
2023 Approved
79 Piccadilly London W1J 8EU
Installation of vinyls to outside of windows
23/05518/LBC
2019 Approved
82 Piccadilly London W1J 8JA
Installation of awnings on the Piccadilly frontage and installation of light fittings on…
19/04603/FULL
2019 Approved
Tenth Floor Devonshire House Mayfair Place London W1J 8AJ
Use of the flat roof to north-east of tenth floor as a roof terrace, including balustrade…
19/04288/LBC
2019 Approved
Tenth Floor Devonshire House Mayfair Place London W1J 8AJ
Use of the flat roof to north-east of tenth floor as a roof terrace for use in associatio…
19/04287/FULL
2019 Approved
82 Piccadilly London W1J 8JA
Display of an externally illuminated projecting sign measuring 0.5m x 0.55m.
19/04604/ADV
2019 Approved
38-40 Stratton Street London W1J 8LT
Display of one internally illuminated projecting sign measuring 0.63m x 1.00m.
19/02641/ADV
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.

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.