34 Park Street London W1K 2JD Data via plota.co.uk

26/04870/NMA - Non-material amendments Pending
Admin / proceduralCommercial premises

Proposal

Amendments to planning permission dated 8 May 2026 () for general refurbishment and M&E upgrade of the office building namely; roof walkable skylight, GF meeting room wall mounted TV, garden bench and planters, fire lobbies, L4 glass partition, reception to hall door swing change, front lightwell electric cupboard change, wall panelling on LGF and L5, LGF modular screen, LGF courtyard window door infill, and LGF cove lighting. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
21 Jul 2026
Decision
Expected by 18 Aug 2026

Under consideration

No decision has been issued yet. A decision is expected by 18 Aug 2026.

Documents 12

Plans & drawings 9

PDF PROPOSED GROUND FLOOR PLAN Drawing · 21 Jul 2026 View ↗ PDF PROPOSED THIRD FLOOR PLAN Drawing · 21 Jul 2026 View ↗ PDF PROPOSED FOURTH FLOOR PLAN Drawing · 21 Jul 2026 View ↗ PDF PROPOSED FIFTH FLOOR PLAN Drawing · 21 Jul 2026 View ↗ PDF PROPOSED ROOF PLANS Drawing · 21 Jul 2026 View ↗ PDF PROPOSED LOWER GROUND FLOOR RCP Drawing · 21 Jul 2026 View ↗ PDF PROPOSED GROUND FLOOR INTERNAL ELEVATIONS Drawing · 21 Jul 2026 View ↗ PDF LGF LOUNGE MODULAR SCREEN Drawing · 21 Jul 2026 View ↗ PDF PROPOSED LOWER GROUND FLOOR PLAN Drawing · 21 Jul 2026 View ↗

Application forms 1

PDF APPLICATIONFORMREDACTED Application Form · 21 Jul 2026 View ↗

Other documents 2

PDF RECEIPT OF APPLICATION Other · 22 Jul 2026 View ↗ PDF APPLICATICON COVER LETTER (1) Background Papers · 21 Jul 2026 View ↗

All documents on the council site ↗

Associated applications 4

Site constraints 12

Grade II listed: 34, Park Street W1
List entry 1226217 · The pin is inside its outline · 33 more listed buildings within 150 m (1 Grade II*, 32 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 33 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 ↗
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.
Also on the record
Registered park or garden 146 m away: Hyde Park; National infrastructure project 1627 m away: Thames Tideway Tunnel; Inside the City of Westminster built-up area; Public transport access: PTAL 6b (excellent), TfL 2023, for the 100 m square; Metropolitan Open Land 97 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.

Building

Floor area710 m² (7,642 sq ft)
Energy ratingE (asset rating 109)
UseB1 Offices and Workshop businesses
HeatingHeating and Natural Ventilation

From the energy performance certificate lodged in May 2018, 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
W1K 2JD
Received
21 Jul 2026
Validated
21 Jul 2026
Ward
West End
Case officer
Show
Target decision
18 Aug 2026
Applicant
Show
Agent
Guarnieri Architects
Leaseholder
Show

Public comments

No public comments yet.

Last counted 7 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-15097969
Planning Portal ref
PP-15097969
Env. assessment
No

Historical activity at this location

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

This property

Previous applications at this address

2025
General refurbishment and M&E upgrade of the office building. (Linked to 25/07808/FULL)
25/07809/LBC
2025
General refurbishment and M&E upgrade of the office building. (Linked to 25/07809/LBC)
25/07808/FULL
Within ~100m

Nearby activity

2025
41 Upper Grosvenor Street London W1K 2NH
External alterations including rooftop and rear extension; and reconfiguration and amalga…
25/07262/FULL
2025 Approved
45 - 47 Mount Street London
Externally alterations at roof level including the removal of the existing fire-escape ga…
25/04151/LBC
2025 Approved
45 - 47 Mount Street London
External alterations at roof level including the removal of the existing fire-escape gant…
25/04150/FULL
2025 Approved
Flat 61 Eaton House 39 - 40 Upper Grosvenor Street London W1K 2NG
Installation of replacement air conditioning unit on the roof.
25/04850/FULL
2025 Approved
22 Park Street London W1K 2JB
Demolition of rear closet wing and erection of rear full width extension at lower ground…
25/04565/LBC
2025 Approved
22 Park Street London W1K 2JB
Demolition of rear closet wing and erection of rear full width extension at lower ground…
25/04564/FULL
2025
41 Reeves Mews London W1K 2EH
Reconfiguration and amalgamation of existing residential accommodation (comprising 2 x 2b…
25/04585/FULL
2025
83 Park Lane London W1K 7HB
Installation of 6 antennas and ancillary development thereto including 6 ERSs and 1 GPS n…
25/03165/FULL
2024
41 Upper Grosvenor Street London W1K 2NH
Change of use of existing commercial use (Use Class E) to residential (Use Class C3) at b…
24/08720/FULL
2024
Gulfinvest House 5 Aldford Street W1K 2AF
Installation of retractable awning at ground floor rear terrace entrance. Linked with 24/…
24/08292/LBC
2024
Gulfinvest House 5 Aldford Street W1K 2AF
Installation of retractable awning at ground floor rear terrace entrance. Linked with 24/…
24/08291/FULL
2024 Approved
50 Park Street London W1K 2JJ
Minor alterations to interior of second floor.
24/06935/LBC
2023 Approved
77 Park Lane London W1K 7TP
Use of former car showroom comprising part ground floor, part lower ground floor and base…
23/06850/FULL
2024
45 Mount Street London W1K 2RZ
Internal alterations at second, third, fourth and fifth floor levels.
24/04625/LBC
2024 Approved
20 Park Street London W1K 2JA
Installation of an iron gate at the entrance of the residence of 20 Park Street.
24/02441/LBC
2024 Approved
20 Park Street London W1K 2JA
Installation of an iron gate at the entrance of the residence of 20 Park Street.
24/02440/FULL
2024
48 Mount Street London W1K 2SB
Installation of lift serving basement to second floors, and associated internal alteratio…
24/03755/LBC
2024
48 Mount Street London W1K 2SB
Installation of lift serving basement to second floors, and associated internal alteratio…
24/03754/FULL
2024
Grosvenor House Apartments Park Lane London W1K 7TN
Installation of a new air handling unit and associated pipes, ductwork and access gantry…
24/03610/FULL
2024 Approved
54 Mount Street London W1K 2SQ
Replacement boiler and associated equipment within plant room at lower ground floor level…
24/02306/FULL
2020 Approved
7 Balfour Place London W1K 2AY
Installation of a new comfort cooling system and accompanying condenser units within an e…
20/02628/LBC
2020 Approved
Basement To First Floor 53 Mount Street London W1K 2SG
Erection of a single storey rear extension at ground floor level, provision of green wall…
20/01092/LBC
2020 Approved
Basement To First Floor 53 Mount Street London W1K 2SG
Erection of a single storey rear extension at ground floor level to enlarge dwellinghouse…
20/01091/FULL
2020 Approved
53 Mount Street London W1K 2SG
Variation of condition 1 of planning permission dated 12 February 2013 (RN: 12/12483/FULL…
20/01459/FULL
2019 Approved
6 Balfour Place London W1K 2AX
Erection of infill extension at basement level in order to enlarge existing office (Class…
19/09635/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

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.

Leaseholders: 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.