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

26/04247/NMA - Non-material amendments Pending
Admin / proceduralCommercial & major worksSolar & renewablesUtility infrastructureCommercial premises

Proposal

Amendments to planning permission dated 7th April 2025 (RN:) for Erection of one additional floor at fifth floor level and infilling of rear lightwell from lower ground floor to fourth floor to provide additional office (Class E) accommodation; creation of terrace at rear fifth floor for use in association with office (Class E) space, installation of Air Source Heat Pumps within acoustic enclosure at new roof level, addition of planter boxes and associated alterations to the front façade, and excavation of plant pit at basement level to provide space for emergency plant equipment. Namely, alterations to the approved front elevation, including the widening of the existing entrance door opening, revisions to front façade detailing, the installation of discreet architectural lighting to the front elevation, and the introduction of a roof access hatch. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
26 Jun 2026
✓
Validated
2 Jul 2026
Decision
Expected by 30 Jul 2026

As of 7 Aug 2026, the council is no longer showing this application on their planning portal. It may have been withdrawn or re-listed under a different reference. We've stopped checking it for updates.

Documents 19

Plans & drawings 7

IMG FRONT LIGHTING RENDER Drawing · 2 Jul 2026 View ↗ PDF 7SS_FRONT_ELEVATION_APPLICATION Drawing · 2 Jul 2026 View ↗ IMG EXISTING FRONT DOOR Drawing · 2 Jul 2026 View ↗ IMG FRONT DOOR IN PLAN Drawing · 2 Jul 2026 View ↗ IMG STEEL COVER EXISITING Drawing · 2 Jul 2026 View ↗ IMG STEEL COVER PROPOSED Drawing · 2 Jul 2026 View ↗ PDF FRONT ELEVATION DOCUMENT Superseded document · 26 Jun 2026 View ↗

Application forms 2

PDF APPLICATIONFORMREDACTED Application Form · 2 Jul 2026 View ↗ PDF FEECALCULATION Background Papers · 2 Jul 2026 View ↗

Other documents 10

PDF ATTACHMENTSUMMARY Background Papers · 2 Jul 2026 View ↗ PDF AMENDMENTSUMMARY Background Papers · 2 Jul 2026 View ↗ PDF RECEIPT OF APPLICATION Other · 30 Jun 2026 View ↗ PDF 1ST INVALID LETTER Background Papers · 30 Jun 2026 View ↗ PDF APPLICATIONFORMREDACTED Superseded document · 26 Jun 2026 View ↗ PDF PROPOSED FRONT DOOR DETAILS (1) Superseded document · 26 Jun 2026 View ↗ PDF PROPOSED FRONT DOOR DETAILS (2) Superseded document · 26 Jun 2026 View ↗ PDF DIAGRAM - FRONT FACADE LIGHTING Superseded document · 26 Jun 2026 View ↗ PDF DIAGRAM 2 - FRONT FACADE LIGHTING Superseded document · 26 Jun 2026 View ↗ IMG FRONT LIGHTING RENDER Superseded document · 26 Jun 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
Non-material amendments
Postcode
W1J 8LE
Received
26 Jun 2026
Validated
2 Jul 2026
Ward
West End
Case officer
Show
Target decision
30 Jul 2026
Applicant
Show
Agent
Adderstone Group
Freehold owner
Show

Consultation & key dates

Alt. reference
PP-14971046
Planning Portal ref
PP-14971046
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
80 Piccadilly London W1J 8HX
Installation of a new timber-framed glazed entrance door, new ribbed plaster cladding and…
25/07451/LBC
2025
80 Piccadilly London W1J 8HX
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
51 Berkeley Street London W1J 8NL
Installation of two replacement external ATM machines, and associated surround signage. (…
25/04213/LBC
2025 Approved
51 Berkeley Street London W1J 8NL
Installation of two replacement external ATM machines, and associated surround signage. (…
25/04342/FULL
2025 Approved
80 Piccadilly London W1J 8HX
Installation of 7 air handling units located at rear ground floor roof level within the e…
25/03063/LBC
2025 Approved
80 Piccadilly London W1J 8HX
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/…
25/04215/ADV
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.