Postcode record · Westminster
SW1X 9HD.
SW1X 9HD has 32 known premises and 17 planning records — 13 approved of 15 decided (86.7%). 18 EPC records.
Postcode SW1X 9HD · boundary not held, centred on the postcodeApprovedRefusedOther17 on the map — every match
At a glance · this postcodeWestminster profile →
32
Premises
known addresses (UPRNs)
17
Applications
15 decided
86.7%
Approval rate
13 approved · 2 refused
78 days
Median decision time
average 90 days · 16 dated decisions
18
EPC records
ratings B 1 · C 12 · D 5
17
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 9HD has 32 known premises and 17 planning records — 13 approved of 15 decided (86.7%). 18 EPC records.
Premises (18 of 32 shown)
Name
Details
UPRN 10033553138
UPRN 10033564666
UPRN 10033577837
UPRN 10033577840
UPRN 10033613028
UPRN 100022774872
UPRN 100022774873
UPRN 100022774874
UPRN 100022774875
UPRN 100022774876
UPRN 10033553138
UPRN 10033564666
UPRN 10033577837
Show all 10 rows
UPRN 10033577840
UPRN 10033613028
UPRN 100022774872
UPRN 100022774873
UPRN 100022774874
UPRN 100022774875
UPRN 100022774876
Planning
What happened?
17 planning applications across the postcode; 13 approved of 15 decided (86.7%). Latest 17 shown.
Reference
Proposal · address
Type
Outcome
Date · distance
Replacement of five single glazed sash windows with double glazed sash window to front elevation (first floor level).
Flat 4 20 Lowndes Square London SW1X 9HD · premises record
Officer Nikki Mitchell
Full Planning Permission Application
Approved
2016-12-02
Details and samples of materials, proposed windows; glazing for windows and roof terrace balustrading and removal of glass balustrades and replacement with metal railings pursuant to Conditions 3, 4 and 7 of planning permission dated 05 April 2011 (RN: 10/10717).
20 Lowndes Square London SW1X 9HD · premises record
Officer South Planning Team
Approval of Details (Full PP)
Approved
2011-06-17
Use of existing ancillary residential space at basement level to provide studio flat, associated alterations to front lightwell.
20 Lowndes Square London SW1X 9HD · premises record
Officer Claragh Mulhern
Full Planning Permission Application
Approved
2011-02-15
Details and sample of balustrading partially pursuant to Condition 3 of planning permission dated 11 March 2010 (RN:09/10203).
20 Lowndes Square London SW1X 9HD · premises record
Officer Tom Burke
Approval of Details (Full PP)
Approved
2010-12-24
Details of samples of the materials to be used for the external surfaces pursuant to Condition 2 of planning permission dated 11 March 2010 (RN:09/10203).
20 Lowndes Square London SW1X 9HD · premises record
Officer South Planning Team
Approval of Details (Full PP)
Approved
2010-12-20
Erection of rear extensions at sixth floor level and extension at seventh floor roof level with associated roof terraces, including chimney and extension of fire escape, metal balustrades and alterations to fenestration in connection with the use of the sixth and seventh floors as a single residential unit.
20 Lowndes Square London SW1X 9HD · premises record
Officer Claragh Mulhern
Full Planning Permission Application
Approved
2010-12-07
Erection of rear extensions at sixth floor level and an extension at seventh floor roof level with associated roof terraces, including chimney and extension of fire escape, in connection with use of the sixth and seventh floors as one residential unit.
20 Lowndes Square London SW1X 9HD · premises record
Officer Claragh Mulhern
Full Planning Permission Application
Approved
2009-12-17
Retention of trellis at roof level.
23 - 25 Lowndes Square London SW1X 9HD · premises record
Officer Joanna Parker
Full Planning Permission Application
Approved
2009-02-10
Alterations and extensions at rear lower ground and upper ground floor levels, terrace at upper ground floor level, alterations to fenestration in front basement lightwell and excavation to provide storage room under existing building.
Flat 2 20 Lowndes Square London SW1X 9HD · premises record
Officer Claragh Mulhern
Full Planning Permission Application
Approved
2007-12-11
Erection of rear extensions at sixth floor level with associated roof terraces. Demolition of lift overrun and erection of extension at seventh floor roof level with associated roof terraces in connection with use of the sixth and seventh floors as one residential unit.
20 Lowndes Square London SW1X 9HD · premises record
Officer Claragh Mulhern
Full Planning Permission Application
Refused
2007-10-26
Replacement of five single glazed sash windows with double glazed sash window to front elevation (first floor level).
Flat 4 20 Lowndes Square London SW1X 9HD · premises record
Officer Nikki Mitchell
Approved
2016-12-02
More
Full Planning Permission Application
Details and samples of materials, proposed windows; glazing for windows and roof terrace balustrading and removal of glass balustrades and replacement with metal railings pursuant to Conditions 3, 4 and 7 of planning permission dated 05 April 2011 (RN: 10/10717).
20 Lowndes Square London SW1X 9HD · premises record
Officer South Planning Team
Approved
2011-06-17
More
Approval of Details (Full PP)
Use of existing ancillary residential space at basement level to provide studio flat, associated alterations to front lightwell.
20 Lowndes Square London SW1X 9HD · premises record
Officer Claragh Mulhern
Approved
2011-02-15
More
Full Planning Permission Application
Show all 10 rows
Details and sample of balustrading partially pursuant to Condition 3 of planning permission dated 11 March 2010 (RN:09/10203).
20 Lowndes Square London SW1X 9HD · premises record
Officer Tom Burke
Approved
2010-12-24
More
Approval of Details (Full PP)
Details of samples of the materials to be used for the external surfaces pursuant to Condition 2 of planning permission dated 11 March 2010 (RN:09/10203).
20 Lowndes Square London SW1X 9HD · premises record
Officer South Planning Team
Approved
2010-12-20
More
Approval of Details (Full PP)
Erection of rear extensions at sixth floor level and extension at seventh floor roof level with associated roof terraces, including chimney and extension of fire escape, metal balustrades and alterations to fenestration in connection with the use of the sixth and seventh floors as a single residential unit.
20 Lowndes Square London SW1X 9HD · premises record
Officer Claragh Mulhern
Approved
2010-12-07
More
Full Planning Permission Application
Erection of rear extensions at sixth floor level and an extension at seventh floor roof level with associated roof terraces, including chimney and extension of fire escape, in connection with use of the sixth and seventh floors as one residential unit.
20 Lowndes Square London SW1X 9HD · premises record
Officer Claragh Mulhern
Approved
2009-12-17
More
Full Planning Permission Application
Retention of trellis at roof level.
23 - 25 Lowndes Square London SW1X 9HD · premises record
Officer Joanna Parker
Approved
2009-02-10
More
Full Planning Permission Application
Alterations and extensions at rear lower ground and upper ground floor levels, terrace at upper ground floor level, alterations to fenestration in front basement lightwell and excavation to provide storage room under existing building.
Flat 2 20 Lowndes Square London SW1X 9HD · premises record
Officer Claragh Mulhern
Approved
2007-12-11
More
Full Planning Permission Application
Erection of rear extensions at sixth floor level with associated roof terraces. Demolition of lift overrun and erection of extension at seventh floor roof level with associated roof terraces in connection with use of the sixth and seventh floors as one residential unit.
20 Lowndes Square London SW1X 9HD · premises record
Officer Claragh Mulhern
Refused
2007-10-26
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 32 premises each one covers.
Designation
Coverage
Article 4 Direction Area
Article 4 Basement Development Permitted Rights Removed · reference 23/00006/REG_4 · covers 32 of 32 premises. Some normally permitted changes may require planning permission.
Article 4 Direction Area
Article 4 Basement Development Permitted Rights Removed · reference 23/00006/REG_4 · covers 32 of 32 premises. Some normally permitted changes may require planning permission.
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 17 applications in this postcode — the party who applied, not the owner or occupier.
Name
Details
Case officer on 6 applications
Case officer on 2 applications
Case officer on 2 applications
Case officer on 2 applications
Case officer on 1 application
Case officer on 1 application
Case officer on 1 application
Case officer on 1 application
Case officer on 6 applications
Case officer on 2 applications
Case officer on 2 applications
Show all 8 rows
Case officer on 2 applications
Case officer on 1 application
Case officer on 1 application
Case officer on 1 application
Case officer on 1 application
Development
What could it become?
Planning precedent17 applications and 17 mapped decisions in this postcode — precedent for what has been permitted and refused here.
Energy18 EPC records; ratings B: 1, C: 12, D: 5.
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.
5 intent signals recorded in this postcode
Portfolio seller · Long hold
Subscribe to see the signals →Boundary: OS Postcode Unit areas (Ordnance Survey), 2026-08-14. Planning records: canonical stage2. EPC: EPC register. Premises: OS AddressBase / UPRN.