Postcode record · Westminster
SW1A 1LD.
SW1A 1LD has 21 known premises and 12 planning records — 8 approved of 9 decided (88.9%).
Postcode SW1A 1LD · boundary not held, centred on the postcodeApprovedRefusedOther12 exact12 on the map — every match
At a glance · this postcodeWestminster profile →
21
Premises
known addresses (UPRNs)
12
Applications
9 decided
88.9%
Approval rate
8 approved · 1 refused
0
EPC records
none recorded
12
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?
SW1A 1LD has 21 known premises and 12 planning records — 8 approved of 9 decided (88.9%).
Premises (18 of 21 shown)
Name
Details
UPRN 10015277439
UPRN 10033547623
UPRN 10033579561
UPRN 10033579752
UPRN 10033586360
UPRN 10033586361
UPRN 10033586363
UPRN 10033586441
UPRN 10033586503
UPRN 10033588903
UPRN 10015277439
UPRN 10033547623
UPRN 10033579561
Show all 10 rows
UPRN 10033579752
UPRN 10033586360
UPRN 10033586361
UPRN 10033586363
UPRN 10033586441
UPRN 10033586503
UPRN 10033588903
Planning
What happened?
12 planning applications across the postcode; 8 approved of 9 decided (88.9%). Latest 12 shown.
Reference
Proposal · address
Type
Outcome
Date · distance
Installation of air conditioning unit at roof level. (NEED TO REAPPLY - REFUND ISSUED)
Cassini House 57 St James's Street London SW1A 1LD · premises record
Full Planning Permission Application
No determination
2025-04-17
Variation of Condition 1 of planning permission dated 7 February 2023 (RN 22/05419/FULL) for the formation of roof terrace, extension to the existing staircase core and relocation of existing roof plant and associated works; Namely, to reduce the height of approved stair enclosure and incorporate a sliding door to allow access to the approved roof terrace.
Cassini House 57 St James's Street London SW1A 1LD · premises record
Full Planning Permission Application
Approved
2023-07-18
Formation of roof terrace, extension to the existing staircase core and relocation of existing roof plant and associated works.
Cassini House 57 St James's Street London SW1A 1LD · premises record
Full Planning Permission Application
Approved
2022-08-08
Installation of four microcell antennas, with the antenna shrouds coloured to match with the colour of the building, one GPS module, associated radio equipment cabinet within the basement area of the property and ancillary works.
Cassini House 57 St James's Street London SW1A 1LD · premises record
Applic. to determine telecom. equipment
Approved
2020-03-25
Use of the sixth floor as offices (Class B1).
Cassini House 57 St James's Street London SW1A 1LD · premises record
Applicant F&C Commercial Property Holdings Lt · Agent Rolfe Judd Planning Ltd · Officer Zulekha Hosenally
Certificate of Lawfulness (existing)
Approved
2018-02-19
Installation of full height flue to lightwell elevation (in connection with emergency generator within basement).
57 St James's Street London SW1A 1LD · premises record
Applicant Friends Provident Life & Pensions Ltd · Agent Gifford-Grant Ltd · Officer Melissa Williams
Full Planning Permission Application
Approved
2004-10-19
Installation of a radio base station comprising 1 equipment cabin and 6 antennae, at roof level.
57 St James's Street London SW1A 1LD · premises record
Full Planning Permission Application
Refused
2001-03-26
Change of use of showroom (part ground floor) to Class B1 office use and alterations to frontage.
57 St James's Street London SW1A 1LD · premises record
Full Planning Permission Application
Approved
2000-05-08
Installation of television aerial and satellite dish at roof level.
57 St James's Street London SW1A 1LD · premises record
Applicant Internet Capital Group (Europe) Ltd · Agent Jones Lang Lasalle
Full Planning Permission Application
Approved
2000-04-04
New entrance at rear ground floor level on Arlington Street.
57 St James's Street London SW1A 1LD · premises record
Applicant FRIENDS PROVIDENT PROPERTY SERVICES LTD · Agent HAMILTON ASSOCIATES ARCHITECTS LTD
Full Planning Permission Application
Approved
1999-09-02
Installation of air conditioning unit at roof level. (NEED TO REAPPLY - REFUND ISSUED)
Cassini House 57 St James's Street London SW1A 1LD · premises record
No determination
2025-04-17
More
Full Planning Permission Application
Variation of Condition 1 of planning permission dated 7 February 2023 (RN 22/05419/FULL) for the formation of roof terrace, extension to the existing staircase core and relocation of existing roof plant and associated works; Namely, to reduce the height of approved stair enclosure and incorporate a sliding door to allow access to the approved roof terrace.
Cassini House 57 St James's Street London SW1A 1LD · premises record
Approved
2023-07-18
More
Full Planning Permission Application
Formation of roof terrace, extension to the existing staircase core and relocation of existing roof plant and associated works.
Cassini House 57 St James's Street London SW1A 1LD · premises record
Approved
2022-08-08
More
Full Planning Permission Application
Show all 10 rows
Installation of four microcell antennas, with the antenna shrouds coloured to match with the colour of the building, one GPS module, associated radio equipment cabinet within the basement area of the property and ancillary works.
Cassini House 57 St James's Street London SW1A 1LD · premises record
Approved
2020-03-25
More
Applic. to determine telecom. equipment
Use of the sixth floor as offices (Class B1).
Cassini House 57 St James's Street London SW1A 1LD · premises record
Applicant F&C Commercial Property Holdings Lt · Agent Rolfe Judd Planning Ltd · Officer Zulekha Hosenally
Approved
2018-02-19
More
Certificate of Lawfulness (existing)
Installation of full height flue to lightwell elevation (in connection with emergency generator within basement).
57 St James's Street London SW1A 1LD · premises record
Applicant Friends Provident Life & Pensions Ltd · Agent Gifford-Grant Ltd · Officer Melissa Williams
Approved
2004-10-19
More
Full Planning Permission Application
Installation of a radio base station comprising 1 equipment cabin and 6 antennae, at roof level.
57 St James's Street London SW1A 1LD · premises record
Refused
2001-03-26
More
Full Planning Permission Application
Change of use of showroom (part ground floor) to Class B1 office use and alterations to frontage.
57 St James's Street London SW1A 1LD · premises record
Approved
2000-05-08
More
Full Planning Permission Application
Installation of television aerial and satellite dish at roof level.
57 St James's Street London SW1A 1LD · premises record
Applicant Internet Capital Group (Europe) Ltd · Agent Jones Lang Lasalle
Approved
2000-04-04
More
Full Planning Permission Application
New entrance at rear ground floor level on Arlington Street.
57 St James's Street London SW1A 1LD · premises record
Applicant FRIENDS PROVIDENT PROPERTY SERVICES LTD · Agent HAMILTON ASSOCIATES ARCHITECTS LTD
Approved
1999-09-02
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 21 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 21 of 21 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 21 of 21 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 21 of 21 premises. Some normally permitted changes may require planning permission.
Central Activities Zone
Named designation not supplied · reference CAZ00000005 · covers 21 of 21 premises. London Plan policies for the Central Activities Zone may apply.
Conservation Area
St James's · reference CONARA/1330 · covers 21 of 21 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 21 of 21 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 21 of 21 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 21 of 21 premises. Some normally permitted changes may require planning permission.
Show all 5 rows
Central Activities Zone
Named designation not supplied · reference CAZ00000005 · covers 21 of 21 premises. London Plan policies for the Central Activities Zone may apply.
Conservation Area
St James's · reference CONARA/1330 · covers 21 of 21 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 12 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
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Agent on 2 applications
Applicant on 2 applications
Applicant on 1 application
Applicant on 1 application
Show all 10 rows
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Agent on 2 applications
Development
What could it become?
Planning precedent12 applications and 12 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.
Thinking about a project here?
Boundary: OS Postcode Unit areas (Ordnance Survey), 2026-08-14. Planning records: canonical stage2. EPC: EPC register. Premises: OS AddressBase / UPRN.