Planning Atlas
AtlasPostcodeW1G9NF
Planning Atlas›Westminster›…Marylebone ward›W1G 9NF
Postcode record · Westminster

W1G 9NF.

W1G 9NF has 60 known premises and 123 planning records — 91 approved of 97 decided (93.8%). 42 EPC records.

Postcode W1G 9NF · boundary not held, centred on the postcodeApprovedRefusedOther139 exact139 on the map — every match
At a glance · this postcodeWestminster profile →
60
Premises
known addresses (UPRNs)
123
Applications
97 decided
93.8%
Approval rate
91 approved · 6 refused
42
EPC records
ratings B 1 · C 21 · D 16 · E 1 · F 3
139
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?

W1G 9NF has 60 known premises and 123 planning records — 91 approved of 97 decided (93.8%). 42 EPC records.

Premises (18 of 60 shown)

Name
Details
UPRN 10033543423
UPRN 10033548756
UPRN 10033582860
UPRN 10033604921
UPRN 10033625009
UPRN 10033655779
UPRN 10033660744
UPRN 100022778403
UPRN 100022778404
UPRN 100022778405
UPRN 10033543423
UPRN 10033548756
UPRN 10033582860
Show all 10 rows
UPRN 10033604921
UPRN 10033625009
UPRN 10033655779
UPRN 10033660744
UPRN 100022778403
UPRN 100022778404
UPRN 100022778405
Planning

What happened?

123 planning applications across the postcode; 91 approved of 97 decided (93.8%). Latest 30 shown.

Reference
Proposal · address
Type
Outcome
Date · distance
Roof extension to the existing mansard roof with associated elevational alterations on the Duchess Street and Rear Elevation, alterations to the existing mansard roof on the Mansfield Street Elevation including a new dormer window and the replacement of the existing external doors, two new rooflights at main roof level, installation of two external air conditioning (AC) condensers at main roof level, replacement of existing rooflights and windows, installation of new external cupboard at terrace level and internal reconfigurations throughout. (Linked with 26/02044/FULL)
Flat 45 2 Mansfield Street London W1G 9NF · premises record
Listed Building Consent Application
Pending
2026-03-27
Roof extension to the existing mansard roof with associated elevational alterations on the Duchess Street and Rear Elevation, alterations to the existing mansard roof on the Mansfield Street Elevation including a new dormer window and the replacement of the existing external doors, two new rooflights at main roof level, installation of two external air conditioning (AC) condensers at main roof level, replacement of existing rooflights and windows, installation of new external cupboard at terrace level and internal reconfigurations throughout. (Linked with 26/02045/LBC)
Flat 45 2 Mansfield Street London W1G 9NF · premises record
Full Planning Permission Application
Pending
2026-03-27
Re-location of previously approved external air conditioning unit at roof level. Linked with 26/01151/FULL
Flat 10 2 Mansfield Street London W1G 9NF · premises record
Listed Building Consent Application
Pending
2026-02-24
Re-location of previously approved external air conditioning unit at roof level. Linked with 26/01152/LBC
Flat 10 2 Mansfield Street London W1G 9NF · premises record
Full Planning Permission Application
Pending
2026-02-24
Installation of external air conditioning unit at roof level and associated cabling and pipework. (Linked with 26/00589/FULL)
Flat 43 2 Mansfield Street London W1G 9NF · premises record
Listed Building Consent Application
Approved
2026-02-02
Installation of external air conditioning unit at roof level and associated cabling and pipework. (Linked with 26/00590/LBC)
Flat 43 2 Mansfield Street London W1G 9NF · premises record
Full Planning Permission Application
Approved
2026-02-02
Alterations to the internal layout including the removal of partitions, construction of new partitions, relocation of door openings / creation of new door openings, new flooring installed throughout, installation of a new fitted kitchen, new bathroom fittings including sanitaryware and tiling and full redecoration throughout.
Flat 53 2 Mansfield Street London W1G 9NF · premises record
Officer Heidi Pearce
Listed Building Consent Application
Approved
2025-06-24
Replacement of 2 existing windows and existing door set with double glazing at the south elevation.
Flat 12 2 Mansfield Street London W1G 9NF · premises record
Listed Building Consent Application
Withdrawn
2025-03-31
Mounting of air source heat pump at roof level and associated cabling and connection via lightwell to Flat 34. (Linked to 24/07903/FULL)
Flat 34 2 Mansfield Street London W1G 9NF · premises record
Listed Building Consent Application
Approved
2024-11-12
Variation of Condition 1 of planning permission dated 12th April 2024 (RN: 24/01037/FULL) for, 'Installation of air source heat pump at roof level and associated cabling and connection via lightwell'; Namely, to correct the location of the heat pump and cabling. (Linked to 24/07905/LBC) (Application under Section 73 of the Act).
Flat 34 2 Mansfield Street London W1G 9NF · premises record
Full Planning Permission Application
Approved
2024-11-12
Roof extension to the existing mansard roof with associated elevational alterations on the Duchess Street and Rear Elevation, alterations to the existing mansard roof on the Mansfield Street Elevation including a new dormer window and the replacement of the existing external doors, two new rooflights at main roof level, installation of two external air conditioning (AC) condensers at main roof level, replacement of existing rooflights and windows, installation of new external cupboard at terrace level and internal reconfigurations throughout. (Linked with 26/02044/FULL)
Flat 45 2 Mansfield Street London W1G 9NF · premises record
Pending
2026-03-27
More
Listed Building Consent Application
Roof extension to the existing mansard roof with associated elevational alterations on the Duchess Street and Rear Elevation, alterations to the existing mansard roof on the Mansfield Street Elevation including a new dormer window and the replacement of the existing external doors, two new rooflights at main roof level, installation of two external air conditioning (AC) condensers at main roof level, replacement of existing rooflights and windows, installation of new external cupboard at terrace level and internal reconfigurations throughout. (Linked with 26/02045/LBC)
Flat 45 2 Mansfield Street London W1G 9NF · premises record
Pending
2026-03-27
More
Full Planning Permission Application
Re-location of previously approved external air conditioning unit at roof level. Linked with 26/01151/FULL
Flat 10 2 Mansfield Street London W1G 9NF · premises record
Pending
2026-02-24
More
Listed Building Consent Application
Show all 10 rows
Re-location of previously approved external air conditioning unit at roof level. Linked with 26/01152/LBC
Flat 10 2 Mansfield Street London W1G 9NF · premises record
Pending
2026-02-24
More
Full Planning Permission Application
Installation of external air conditioning unit at roof level and associated cabling and pipework. (Linked with 26/00589/FULL)
Flat 43 2 Mansfield Street London W1G 9NF · premises record
Approved
2026-02-02
More
Listed Building Consent Application
Installation of external air conditioning unit at roof level and associated cabling and pipework. (Linked with 26/00590/LBC)
Flat 43 2 Mansfield Street London W1G 9NF · premises record
Approved
2026-02-02
More
Full Planning Permission Application
Alterations to the internal layout including the removal of partitions, construction of new partitions, relocation of door openings / creation of new door openings, new flooring installed throughout, installation of a new fitted kitchen, new bathroom fittings including sanitaryware and tiling and full redecoration throughout.
Flat 53 2 Mansfield Street London W1G 9NF · premises record
Officer Heidi Pearce
Approved
2025-06-24
More
Listed Building Consent Application
Replacement of 2 existing windows and existing door set with double glazing at the south elevation.
Flat 12 2 Mansfield Street London W1G 9NF · premises record
Withdrawn
2025-03-31
More
Listed Building Consent Application
Mounting of air source heat pump at roof level and associated cabling and connection via lightwell to Flat 34. (Linked to 24/07903/FULL)
Flat 34 2 Mansfield Street London W1G 9NF · premises record
Approved
2024-11-12
More
Listed Building Consent Application
Variation of Condition 1 of planning permission dated 12th April 2024 (RN: 24/01037/FULL) for, 'Installation of air source heat pump at roof level and associated cabling and connection via lightwell'; Namely, to correct the location of the heat pump and cabling. (Linked to 24/07905/LBC) (Application under Section 73 of the Act).
Flat 34 2 Mansfield Street London W1G 9NF · premises record
Approved
2024-11-12
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 60 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 60 of 60 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 60 of 60 premises. Some normally permitted changes may require planning permission.
Central Activities Zone
Named designation not supplied · reference CAZ00000005 · covers 60 of 60 premises. London Plan policies for the Central Activities Zone may apply.
Conservation Area
Harley Street · reference 07/01600/CONARA · covers 60 of 60 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 60 of 60 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 60 of 60 premises. Some normally permitted changes may require planning permission.
Central Activities Zone
Named designation not supplied · reference CAZ00000005 · covers 60 of 60 premises. London Plan policies for the Central Activities Zone may apply.
Show all 4 rows
Conservation Area
Harley Street · reference 07/01600/CONARA · covers 60 of 60 premises. Demolition, alterations, trees and design are subject to additional heritage controls.
People

Who is involved?

Named on the latest 30 applications in this postcode — the party who applied, not the owner or occupier.

Name
Details
Applicant on 1 application
Applicant on 1 application
Agent on 1 application
Agent on 1 application
Case officer on 11 applications
Case officer on 4 applications
Case officer on 4 applications
Case officer on 3 applications
Case officer on 2 applications
Case officer on 2 applications
Applicant on 1 application
Applicant on 1 application
Agent on 1 application
Show all 10 rows
Agent on 1 application
Case officer on 11 applications
Case officer on 4 applications
Case officer on 4 applications
Case officer on 3 applications
Case officer on 2 applications
Case officer on 2 applications
Development

What could it become?

Planning precedent123 applications and 139 mapped decisions in this postcode — precedent for what has been permitted and refused here.
Energy42 EPC records; ratings B: 1, C: 21, D: 16, E: 1, F: 3.
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 Pro

Ownership, finance and market signals recorded at addresses in this postcode — each with date and source. Signals are evidence of change, not a prediction.

13 intent signals recorded in this postcode
Charge registered · Ageing director · Repeat sale · Price decline · EPC F/G · Long hold
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Boundary: OS Postcode Unit areas (Ordnance Survey), 2026-08-14. Planning records: canonical stage2. EPC: EPC register. Premises: OS AddressBase / UPRN.