Postcode record · Westminster
SW1X 8JA.
SW1X 8JA has 17 known premises and 18 planning records — 13 approved of 14 decided (92.9%). 6 EPC records.
Postcode SW1X 8JA · boundary not held, centred on the postcodeApprovedRefusedOther19 on the map — every match
At a glance · this postcodeWestminster profile →
17
Premises
known addresses (UPRNs)
18
Applications
14 decided
92.9%
Approval rate
13 approved · 1 refused
100 days
Median decision time
average 111 days · 15 dated decisions
6
EPC records
ratings C 1 · D 3 · E 2
19
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?
SW1X 8JA has 17 known premises and 18 planning records — 13 approved of 14 decided (92.9%). 6 EPC records.
Premises
Name
Details
UPRN 10033553020
UPRN 10033565706
UPRN 10033568353
UPRN 10033576666
UPRN 10033586243
UPRN 100022816881
UPRN 100022816884
UPRN 100022816885
UPRN 100022816886
UPRN 10033553020
UPRN 10033565706
Show all 10 rows
UPRN 10033568353
UPRN 10033576666
UPRN 10033586243
UPRN 100022816881
UPRN 100022816884
UPRN 100022816885
UPRN 100022816886
Planning
What happened?
18 planning applications across the postcode; 13 approved of 14 decided (92.9%). Latest 18 shown.
Reference
Proposal · address
Type
Outcome
Date · distance
Alterations to existing flat roof at rear third floor level to form a roof terrace, raising of the parapet, installation of decking and replacement of window with a door at rear third floor level.
Flat 5 6 West Halkin Street London SW1X 8JA · premises record
Officer Zulekha Hosenally
Listed Building Consent Application
Approved
2025-11-05
Alterations to existing flat roof at rear third floor level to form a roof terrace, raising of the parapet, installation of decking and replacement of window with a door at rear third floor level.
Flat 5 6 West Halkin Street London SW1X 8JA · premises record
Officer Zulekha Hosenally
Full Planning Permission Application
Approved
2025-11-05
Installation of double glazed heritage slimline profile windows to the front fourth floor level and rear third and fourth floor level.
Flat 5 6 West Halkin Street London SW1X 8JA · premises record
Officer Nikki Mitchell
Listed Building Consent Application
Approved
2025-06-30
Installation of double glazed heritage slimline profile windows to the front fourth floor level and rear third and fourth floor level.
Flat 5 6 West Halkin Street London SW1X 8JA · premises record
Officer Nikki Mitchell
Full Planning Permission Application
Approved
2025-06-30
Internal layout alterations and associated works
Flat 5 6 West Halkin Street London SW1X 8JA · premises record
Officer Nikki Mitchell
Listed Building Consent Application
Approved
2025-01-07
Replacement of third floor and mansard levels windows with double glazed heritage slimline windows; internal layout alterations; and associated works. (Linked with 25/00085/LBC)
Flat 5 6 West Halkin Street London SW1X 8JA · premises record
Officer Nikki Mitchell
Full Planning Permission Application
Withdrawn
2025-01-07
Installation of 1 no. extract and 1 no. flue onto the rear lightwell. Linked to 17/03588/LBC.
Third Floor And Fourth Floor Maisonette 4 West Halkin Street London SW1X 8JA · premises record
Officer Allison Borden
Full Planning Permission Application
Approved
2017-04-26
Internal alterations including redecoration of the common parts, installation of a new entrance screen/door set for the flat and, within the flat, removal and addition of partitions, new kitchen and bathroom fixtures and fittings and renewal of services. Linked to 17/03587/FULL.
Third Floor And Fourth Floor Maisonette 4 West Halkin Street London SW1X 8JA · premises record
Officer Allison Borden
Listed Building Consent Application
Approved
2017-04-26
Internal alterations including the removal and addition of partitions and replacement of internal doors at first floor level (retrospective application).
First Floor Flat 4 West Halkin Street London SW1X 8JA · premises record
Officer Allison Borden
Listed Building Consent Application
Approved
2016-08-17
Installation of boiler flue and rainwater downpipe. Internal alterations including the removal and addition of partitions [in association with flat 3]
6 West Halkin Street London SW1X 8JA · premises record
Officer Nikki Mitchell
Listed Building Consent Application
Approved
2015-12-21
Alterations to existing flat roof at rear third floor level to form a roof terrace, raising of the parapet, installation of decking and replacement of window with a door at rear third floor level.
Flat 5 6 West Halkin Street London SW1X 8JA · premises record
Officer Zulekha Hosenally
Approved
2025-11-05
More
Listed Building Consent Application
Alterations to existing flat roof at rear third floor level to form a roof terrace, raising of the parapet, installation of decking and replacement of window with a door at rear third floor level.
Flat 5 6 West Halkin Street London SW1X 8JA · premises record
Officer Zulekha Hosenally
Approved
2025-11-05
More
Full Planning Permission Application
Installation of double glazed heritage slimline profile windows to the front fourth floor level and rear third and fourth floor level.
Flat 5 6 West Halkin Street London SW1X 8JA · premises record
Officer Nikki Mitchell
Approved
2025-06-30
More
Listed Building Consent Application
Show all 10 rows
Installation of double glazed heritage slimline profile windows to the front fourth floor level and rear third and fourth floor level.
Flat 5 6 West Halkin Street London SW1X 8JA · premises record
Officer Nikki Mitchell
Approved
2025-06-30
More
Full Planning Permission Application
Internal layout alterations and associated works
Flat 5 6 West Halkin Street London SW1X 8JA · premises record
Officer Nikki Mitchell
Approved
2025-01-07
More
Listed Building Consent Application
Replacement of third floor and mansard levels windows with double glazed heritage slimline windows; internal layout alterations; and associated works. (Linked with 25/00085/LBC)
Flat 5 6 West Halkin Street London SW1X 8JA · premises record
Officer Nikki Mitchell
Withdrawn
2025-01-07
More
Full Planning Permission Application
Installation of 1 no. extract and 1 no. flue onto the rear lightwell. Linked to 17/03588/LBC.
Third Floor And Fourth Floor Maisonette 4 West Halkin Street London SW1X 8JA · premises record
Officer Allison Borden
Approved
2017-04-26
More
Full Planning Permission Application
Internal alterations including redecoration of the common parts, installation of a new entrance screen/door set for the flat and, within the flat, removal and addition of partitions, new kitchen and bathroom fixtures and fittings and renewal of services. Linked to 17/03587/FULL.
Third Floor And Fourth Floor Maisonette 4 West Halkin Street London SW1X 8JA · premises record
Officer Allison Borden
Approved
2017-04-26
More
Listed Building Consent Application
Internal alterations including the removal and addition of partitions and replacement of internal doors at first floor level (retrospective application).
First Floor Flat 4 West Halkin Street London SW1X 8JA · premises record
Officer Allison Borden
Approved
2016-08-17
More
Listed Building Consent Application
Installation of boiler flue and rainwater downpipe. Internal alterations including the removal and addition of partitions [in association with flat 3]
6 West Halkin Street London SW1X 8JA · premises record
Officer Nikki Mitchell
Approved
2015-12-21
More
Listed Building Consent 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 17 premises each one covers.
Designation
Coverage
Article 4 Direction Area
Article 4 Basement Development Permitted Rights Removed · reference 23/00006/REG_4 · covers 17 of 17 premises. Some normally permitted changes may require planning permission.
Conservation Area
Belgravia · reference CONARA/1350 · covers 17 of 17 premises. Demolition, alterations, trees and design are subject to additional heritage controls.
Article 4 Direction Area
Article 4 Basement Development Permitted Rights Removed · reference 23/00006/REG_4 · covers 17 of 17 premises. Some normally permitted changes may require planning permission.
Conservation Area
Belgravia · reference CONARA/1350 · covers 17 of 17 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 18 applications in this postcode — the party who applied, not the owner or occupier.
Name
Details
Case officer on 6 applications
Case officer on 4 applications
Case officer on 2 applications
Case officer on 1 application
Case officer on 1 application
Case officer on 6 applications
Case officer on 4 applications
Case officer on 2 applications
Show all 5 rows
Case officer on 1 application
Case officer on 1 application
Development
What could it become?
Planning precedent18 applications and 19 mapped decisions in this postcode — precedent for what has been permitted and refused here.
Energy6 EPC records; ratings C: 1, D: 3, E: 2.
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.
Boundary: OS Postcode Unit areas (Ordnance Survey), 2026-08-14. Planning records: canonical stage2. EPC: EPC register. Premises: OS AddressBase / UPRN.