Postcode record · Westminster
SW1Y 4LE.
SW1Y 4LE has 1 known premises and 22 planning records — 14 approved of 14 decided (100%).
Postcode SW1Y 4LE · boundary not held, centred on the postcodeApprovedRefusedOther26 exact26 on the map — every match
At a glance · this postcodeWestminster profile →
1
Premises
known addresses (UPRNs)
22
Applications
14 decided
100%
Approval rate
14 approved · 0 refused
0
EPC records
none recorded
26
Mapped applications
inside the postcode shape
Postcode unit boundary from Ordnance Survey; premises and applications inside it. Aggregates describe the area, not any single premises.
Property
What is it?
SW1Y 4LE has 1 known premises and 22 planning records — 14 approved of 14 decided (100%).
Premises
Name
Details
UPRN 10033543661
UPRN 10033543661
Planning
What happened?
22 planning applications across the postcode; 14 approved of 14 decided (100%). Latest 22 shown.
Reference
Proposal · address
Type
Outcome
Date · distance
Removal of internal partition wall in the office spaces at the second floor.
Chatham House 10 St James's Square London SW1Y 4LE · premises record
Officer South Planning Team
Listed Building Consent Application
Pending
2026-05-18
Removal and replacement of rainwater pipes and gutters. Removal and like for like replacement of a modern rooflight.
Chatham House 10 St James's Square London SW1Y 4LE · premises record
Officer Nikki Mitchell
Listed Building Consent Application
Approved
2021-09-08
Removal and replacement of rainwater pipes and gutters. Removal and like for like replacement of a modern rooflight.
Chatham House 10 St James's Square London SW1Y 4LE · premises record
Full Planning Permission Application
Approved
2021-09-08
Internal refurbishment works including lighting installation throughout both buildings basement, ground, first and second floors, repairs to the marble flooring within the Duke of York Hall, access control (security) installation throughout both buildings, installation of lighting within the niches in the reception room, and wall-mounted heater within the main reception area above the main entrance. [Includes 9 St James's Square]
Chatham House 10 St James's Square London SW1Y 4LE · premises record
Officer Allison Borden
Listed Building Consent Application
Approved
2019-09-16
Plasterwork repairs within the main staircase
Chatham House 10 St James's Square London SW1Y 4LE · premises record
Officer Heidi Pearce
Listed Building Consent Application
Withdrawn
2019-07-08
Replacement of two existing condenser units and installation of a new condenser unit at fourth floor roof level.
Chatham House 10 St James's Square London SW1Y 4LE · premises record
Officer Nosheen Javed
Listed Building Consent Application
Approved
2019-05-17
Replacement of two existing condenser units and installation of a new condenser unit at fourth floor roof level.
Chatham House 10 St James's Square London SW1Y 4LE · premises record
Full Planning Permission Application
Approved
2019-05-17
Internal refurbishment works at basement, ground and first floor levels.
Chatham House 10 St James's Square London SW1Y 4LE · premises record
Officer Allison Borden
Listed Building Consent Application
Withdrawn
2019-04-18
Variation of Condition 1 of planning permission dated 25 July 2016 (RN: 16/04844/FULL) for the creation of two windows and replacement of two casements for sash windows at basement level of Ames House and removal of lightwell staircase. Installation of plant and new roof light to the roof within an internal lightwell area over ground floor level, new roof finish and insulation at ground floor roof level of Ames House. Replacement of existing plant and associated pipework at first floor level of Ames House. Internal alterations at basement and ground floor levels including the creation of openings between 10 St James Square, 9 Duke of York Street & Ames House, alterations to internal layout with the removal of internal walls, doors and ceilings, and the creation of conference rooms, break out facilities and eating areas, reconfiguration of plant and details of rooflights; Namely; reconfiguration of large modular rooflight and small square rooflights with three long narrow rooflights and two small circular rooflights.
Chatham House 10 St James's Square London SW1Y 4LE · premises record
Officer Nikki Mitchell
Full Planning Permission Application
Approved
2016-10-31
Variation of Condition 1 of planning permission dated 1 October 2016 (RN: 15/05933/FULL) for Creation of two windows and replacement of two casements for sash windows at basement level of Ames House and removal of lightwell staircase. Installation of plant and new roof light to the roof within an internal lightwell area over ground floor level, new roof finish and insulation at ground floor roof level of Ames House. Replacement of existing plant and associated pipework at first floor level of Ames House. Internal alterations at basement and ground floor levels including the creation of openings between 10 St James Square, 9 Duke of York Street & Ames House, alterations to internal layout with the removal of internal walls, doors and ceilings, and the creation of conference rooms, break out facilities and eating areas; Namely to vary the approved drawings with regard to reconfiguration of plant and details of rooflights.
Chatham House 10 St James's Square London SW1Y 4LE · premises record
Officer Nikki Mitchell
Full Planning Permission Application
Approved
2016-05-23
Removal of internal partition wall in the office spaces at the second floor.
Chatham House 10 St James's Square London SW1Y 4LE · premises record
Officer South Planning Team
Pending
2026-05-18
More
Listed Building Consent Application
Removal and replacement of rainwater pipes and gutters. Removal and like for like replacement of a modern rooflight.
Chatham House 10 St James's Square London SW1Y 4LE · premises record
Officer Nikki Mitchell
Approved
2021-09-08
More
Listed Building Consent Application
Removal and replacement of rainwater pipes and gutters. Removal and like for like replacement of a modern rooflight.
Chatham House 10 St James's Square London SW1Y 4LE · premises record
Approved
2021-09-08
More
Full Planning Permission Application
Show all 10 rows
Internal refurbishment works including lighting installation throughout both buildings basement, ground, first and second floors, repairs to the marble flooring within the Duke of York Hall, access control (security) installation throughout both buildings, installation of lighting within the niches in the reception room, and wall-mounted heater within the main reception area above the main entrance. [Includes 9 St James's Square]
Chatham House 10 St James's Square London SW1Y 4LE · premises record
Officer Allison Borden
Approved
2019-09-16
More
Listed Building Consent Application
Plasterwork repairs within the main staircase
Chatham House 10 St James's Square London SW1Y 4LE · premises record
Officer Heidi Pearce
Withdrawn
2019-07-08
More
Listed Building Consent Application
Replacement of two existing condenser units and installation of a new condenser unit at fourth floor roof level.
Chatham House 10 St James's Square London SW1Y 4LE · premises record
Officer Nosheen Javed
Approved
2019-05-17
More
Listed Building Consent Application
Replacement of two existing condenser units and installation of a new condenser unit at fourth floor roof level.
Chatham House 10 St James's Square London SW1Y 4LE · premises record
Approved
2019-05-17
More
Full Planning Permission Application
Internal refurbishment works at basement, ground and first floor levels.
Chatham House 10 St James's Square London SW1Y 4LE · premises record
Officer Allison Borden
Withdrawn
2019-04-18
More
Listed Building Consent Application
Variation of Condition 1 of planning permission dated 25 July 2016 (RN: 16/04844/FULL) for the creation of two windows and replacement of two casements for sash windows at basement level of Ames House and removal of lightwell staircase. Installation of plant and new roof light to the roof within an internal lightwell area over ground floor level, new roof finish and insulation at ground floor roof level of Ames House. Replacement of existing plant and associated pipework at first floor level of Ames House. Internal alterations at basement and ground floor levels including the creation of openings between 10 St James Square, 9 Duke of York Street & Ames House, alterations to internal layout with the removal of internal walls, doors and ceilings, and the creation of conference rooms, break out facilities and eating areas, reconfiguration of plant and details of rooflights; Namely; reconfiguration of large modular rooflight and small square rooflights with three long narrow rooflights and two small circular rooflights.
Chatham House 10 St James's Square London SW1Y 4LE · premises record
Officer Nikki Mitchell
Approved
2016-10-31
More
Full Planning Permission Application
Variation of Condition 1 of planning permission dated 1 October 2016 (RN: 15/05933/FULL) for Creation of two windows and replacement of two casements for sash windows at basement level of Ames House and removal of lightwell staircase. Installation of plant and new roof light to the roof within an internal lightwell area over ground floor level, new roof finish and insulation at ground floor roof level of Ames House. Replacement of existing plant and associated pipework at first floor level of Ames House. Internal alterations at basement and ground floor levels including the creation of openings between 10 St James Square, 9 Duke of York Street & Ames House, alterations to internal layout with the removal of internal walls, doors and ceilings, and the creation of conference rooms, break out facilities and eating areas; Namely to vary the approved drawings with regard to reconfiguration of plant and details of rooflights.
Chatham House 10 St James's Square London SW1Y 4LE · premises record
Officer Nikki Mitchell
Approved
2016-05-23
More
Full Planning Permission Application
Building control
Building-control records are not yet collected for Westminster — the register is being gathered borough by borough (held so far: Lambeth, Brent, Ealing, Westminster, City and others).
Place
What affects it?
Every mapped designation touching a premises in this postcode, with how many of its 1 premises each one covers.
Designation
Coverage
Archaeological Priority Area
City of Westminster APA 2.5: Great Estates Summary and Definition The Great Estates APA covers an area bounded by Park Lane to the west, Green Park and St James’s Park to the south, Haymarket, Shaftesbury Avenue, Charing Cross Road and t · reference 76098 · covers 1 of 1 premises. Groundworks may require archaeological assessment or investigation.
Article 4 Direction Area
Article 4 Basement Development Permitted Rights Removed · reference 23/00006/REG_4 · covers 1 of 1 premises. Some normally permitted changes may require planning permission.
Article 4 Direction Area
Article 4 Direction Class E To C3 In Central Activities Zone · reference 23/00004/REG_4 · covers 1 of 1 premises. Some normally permitted changes may require planning permission.
Central Activities Zone
Named designation not supplied · reference CAZ00000005 · covers 1 of 1 premises. London Plan policies for the Central Activities Zone may apply.
Conservation Area
St James's · reference CONARA/1330 · covers 1 of 1 premises. Demolition, alterations, trees and design are subject to additional heritage controls.
Archaeological Priority Area
City of Westminster APA 2.5: Great Estates Summary and Definition The Great Estates APA covers an area bounded by Park Lane to the west, Green Park and St James’s Park to the south, Haymarket, Shaftesbury Avenue, Charing Cross Road and t · reference 76098 · covers 1 of 1 premises. Groundworks may require archaeological assessment or investigation.
Article 4 Direction Area
Article 4 Basement Development Permitted Rights Removed · reference 23/00006/REG_4 · covers 1 of 1 premises. Some normally permitted changes may require planning permission.
Article 4 Direction Area
Article 4 Direction Class E To C3 In Central Activities Zone · reference 23/00004/REG_4 · covers 1 of 1 premises. Some normally permitted changes may require planning permission.
Show all 5 rows
Central Activities Zone
Named designation not supplied · reference CAZ00000005 · covers 1 of 1 premises. London Plan policies for the Central Activities Zone may apply.
Conservation Area
St James's · reference CONARA/1330 · covers 1 of 1 premises. Demolition, alterations, trees and design are subject to additional heritage controls.
Nearby postcodes and streets
Walk to the next area — linked where the Atlas has a record for it (pilot borough only for now).
People
Who is involved?
Named on the latest 22 applications in this postcode — the party who applied, not the owner or occupier.
Name
Details
Applicant on 2 applications
Applicant on 1 application
Applicant on 1 application
Agent on 2 applications
Agent on 1 application
Agent on 1 application
Case officer on 4 applications
Case officer on 3 applications
Case officer on 3 applications
Case officer on 2 applications
Applicant on 2 applications
Applicant on 1 application
Applicant on 1 application
Show all 10 rows
Agent on 2 applications
Agent on 1 application
Agent on 1 application
Case officer on 4 applications
Case officer on 3 applications
Case officer on 3 applications
Case officer on 2 applications
Development
What could it become?
Planning precedent22 applications and 26 mapped decisions in this postcode — precedent for what has been permitted and refused here.
EnergyNo EPC records joined yet.
What is not assertedNo capacity, value or ownership claim is made at area level; those belong to individual premises records and their evidence.
Intent signals
Planning Atlas ProOwnership, finance and market signals recorded at addresses in this postcode — each with date and source. Signals are evidence of change, not a prediction.
No intent signal is currently recorded in this postcode.
Boundary: OS Postcode Unit areas (Ordnance Survey), 2026-08-14. Planning records: canonical stage2. EPC: EPC register. Premises: OS AddressBase / UPRN.