34 Park Street London W1K 2JD Data via plota.co.uk
Proposal
General refurbishment and M&E upgrade of the office building. (Linked to 25/07809/LBC) Data via plota.co.uk
Application progress
Approved on 8 May 2026 · Delegated Decision · Last checked 17 Oct 2026
Documents 54
Decision & officer reports 2
Statements & assessments 4
Plans & drawings 22
Application forms 1
Consultation & comments 1
Other documents 24
Associated applications 7
- General refurbishment and M&E upgrade of the office building. (Linked)
Show 2 more · 1 approved, 1 pending
Site constraints 12
Show the other 33 with distances
- 2 m54, Mount Street, W1Grade II*
- 5 m36-42, Park Street W1Grade II
- 25 m53, Mount Street W1Grade II
- 35 m14-22, PARK STREET W1 (See details for further address information)Grade II
- 36 m45-52, Mount Street W1Grade II
- 45 m44-50 Park Street and 37 Upper Grosvenor StreetGrade II
- 49 m78, Mount Street W1Grade II
- 56 m79, Mount Street W1Grade II
- 63 m7 and 8, Balfour Place W1Grade II
- 67 m6, Aldford Street W1Grade II
- 72 m5, Aldford Street W1Grade II
- 81 m45, Reeves Mews W1Grade II
- 95 mNumbers 1, 3 and 5 (Mews to Numbers 8, 10 and 12 Park Street) and Service Block Along Aldford StreetGrade II
- 107 m45, Upper Grosvenor Street W1Grade II
- 108 m44, Upper Grosvenor Street W1Grade II
- 115 m48, Upper Grosvenor Street W1Grade II
- 122 m12, Upper Grosvenor Street W1Grade II
- 122 m9, Upper Grosvenor Street W1Grade II
- 122 m3, Aldford Street W1Grade II
- 126 m37-43 Park StreetGrade II
- 126 m7, Upper Grosvenor Street W1Grade II
- 127 m6, Upper Grosvenor Street W1Grade II
- 128 m4 and 4a, Aldford Street W1Grade II
- 131 m15, Upper Grosvenor Street W1Grade II
- 132 m12A AND 13 AND 15, BALFOUR MEWS W1 (See details for further address information)Grade II
- 135 m16, Upper Grosvenor Street W1Grade II
- 135 m34-42, SOUTH AUDLEY STREET W1 (See details for further address information)Grade II
- 136 m58, Park Street W1Grade II
- 139 m17, Upper Grosvenor Street W1Grade II
- 139 m87-102, MOUNT STREET W1 (See details for further address information)Grade II
- 139 mUnited States of America EmbassyGrade II
- 143 m60, Park Street W1Grade II
- 144 m18, Upper Grosvenor Street W1Grade II
Checked on 2 November 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
From the energy performance certificate lodged in May 2018, the latest held for this property. The building may have changed since. View the certificate
Every application in Westminster - and every UK council - as a live feed, an API, or a bulk CSV export.
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Important details
- Council
- Westminster
- Application type
- Full Planning Permission Application
- Postcode
- W1K 2JD
- Received
- 28 Oct 2025
- Validated
- 28 Oct 2025
- Ward
- West End
- Case officer
- Show
- Target decision
- 14 May 2026
- Decision
- Application Permitted
- Decision date
- 8 May 2026
- Decision level
- Delegated Decision
- Applicant
- Show
- Agent
- Guarnieri Architects
- Leaseholder
- Show
How this decision compares
Decided in 192 days from validation, 116 days slower than Westminster's median of 76 for full applications. Approved, as 86% of full applications here are.
Plota live figures for full applications decided by Westminster in the last twelve months, from validation. Westminster decision record →
Public comments
No public comments yet.
37 neighbours consulted · Last counted 17 Oct 2026
Consultation & key dates
- Alt. reference
- PP-14414980
- Planning Portal ref
- PP-14414980
- Comments by
- 26 Nov 2025
- Site or press notice
- 5 Nov 2025
- Env. assessment
- No
Historical activity at this location
26 previous applications on record - archival context, not part of the live application.
Previous applications at this address
Nearby activity
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.
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.
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34 Park Street London W1K 2JD
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