37 Harley Street London W1G 8QG Data via plota.co.uk

26/03517/FULL - Full Planning Permission Application Approved
Utility infrastructure

Proposal

Installation of two air condenser units within acoustic enclosure to front lightwell. (Linked with 26/03518/LBC) Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
28 May 2026
✓
Consultation
15 Jun 2026
✓
Approved
18 Aug 2026

Approved on 18 Aug 2026 · Delegated Decision · Last checked 19 Aug 2026

Documents 15

Decision & officer reports 2

PDF GRANT OF FULL PP [PE] Decision Notice · 19 Aug 2026 View ↗ PDF DELEGATED REPORT Report · 19 Aug 2026 View ↗

Statements & assessments 2

PDF NOISE IMPACT ASSESSMENT Noise impact assessment · 28 May 2026 View ↗ PDF DAS_PLANNING_HERITAGE_SUSTAINABILITY STATEMENT AND COVERING LET Design and Access Statement · 28 May 2026 View ↗

Plans & drawings 3

PDF PROPOSED BASEMENT AND GROUND FLOOR AND ELEVATIONS Drawing · 28 May 2026 View ↗ PDF EXISTING BASEMENT AND GROUND FLOOR AND ELEVATIONS Drawing · 28 May 2026 View ↗ PDF LOCATION PLAN Location Plan · 28 May 2026 View ↗

Application forms 1

PDF APPLICATIONFORMREDACTED Application Form · 28 May 2026 View ↗

Consultation & comments 2

PDF ENVIROMENTAL HEALTH COMMENTS Consultee Comment · 1 Jul 2026 View ↗ PDF NEIGHBOUR NOTIFICATION LETTER (21D) Background Papers · 15 Jun 2026 View ↗

Other documents 5

PDF ACK-GENERAL LETTER (G/P/C) Background Papers · 15 Jun 2026 View ↗ PDF CNSLT-LA SOCIETY Background Papers · 15 Jun 2026 View ↗ PDF SITE NOTICE 21 OR 28 DAYS IF T&C APPL. Background Papers · 15 Jun 2026 View ↗ PDF RECEIPT OF APPLICATION Other · 1 Jun 2026 View ↗ PDF RXM-M2V1B_DATABOOK_EEDEN16 Background Papers · 28 May 2026 View ↗

All documents on the council site ↗

Associated applications 3

Site constraints 8

Grade II* listed: 37, Harley Street W1
List entry 1066670 · The pin is inside its outline · 77 more listed buildings within 150 m (1 Grade I, 5 Grade II*, 71 Grade II)
Listed building consent is needed for work that affects the special interest of a listed building, inside or out, on top of planning permission. Setting can be a consideration for buildings nearby; there is no fixed radius.
Show the other 77 with distances
Historic England ↗
Harley Street conservation area
Demolition needs planning permission and permitted development is restricted.
The council must give weight to preserving or enhancing the area's character and appearance. Not every council has published its boundaries as open data.
Council document ↗
2 Article 4 directions
Article 4 Basement Development Permitted Rights Removed · Article 4 Direction Class E To C3 In Central Activities Zone. Named permitted development rights are withdrawn here.
An Article 4 direction withdraws particular permitted development rights, so work that would normally need no application needs one here. Not every council has published its directions.
Air quality management area: Westminster AQMA
The council has declared the area as failing an air quality objective.
Schemes that add traffic, parking or combustion plant are assessed against the area's action plan and may need an air quality assessment.
Council record ↗
Central activities zone
The core of central London in the London Plan.
Offices, culture and the other strategic functions of the centre take priority over new housing here.
Also on the record
National infrastructure project 1757 m away: Thames Tideway Tunnel; Inside the City of Westminster built-up area; Public transport access: PTAL 6b (excellent), TfL 2023, for the 100 m square.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 6 October 2026. Historic England, the Environment Agency, Natural England, the Planning Inspectorate, Transport for London (public transport access levels, Powered by TfL Open Data, OGL v3.0, contains OS data © Crown copyright and database right 2025) and council datasets, Open Government Licence. A boundary can run through a site and the council holds the definitive record: confirm with the council before relying on this.

Building

Floor area164 m² (1,765 sq ft)
Energy ratingC (72 out of 100)
PropertySemi-detached flat, 4 habitable rooms
Built1930 to 1949
HeatingBoiler and radiators, mains gas
WallsSolid brick, as built, no insulation (assumed)

From the energy performance certificate lodged in January 2024, the latest held for this property. The building may have changed since. View the certificate

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Important details

Council
Westminster
Application type
Full Planning Permission Application
Postcode
W1G 8QG
Received
28 May 2026
Validated
28 May 2026
Ward
Marylebone
Case officer
Show
Target decision
23 Jul 2026
Decision
Application Permitted
Decision date
18 Aug 2026
Decision level
Delegated Decision
Applicant
Show
Agent
Howard De Walden Estates Limited

How this decision compares

Decided in 82 days from validation, 25 days slower than Westminster's median of 57 for utility and infrastructure works. Approved, as 90% of utility and infrastructure works here are.

49%decided within 8 weeks
90%approved
413decided in the last year

Plota live figures for utility and infrastructure works decided by Westminster in the last twelve months, from validation. Westminster decision record →

Public comments

No public comments yet.

17 neighbours consulted · Last counted 19 Aug 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-14859206
Planning Portal ref
PP-14859206
Comments by
6 Jul 2026
Site or press notice
15 Jun 2026
Env. assessment
No

Historical activity at this location

29 previous applications on record - archival context, not part of the live application.

This property

Previous applications at this address

2023 Approved
Installation of two air conditioning units at first floor level replacing two existing un…
23/06651/FULL
2023 Approved
Replacement of lower ground floor windows with matching units; remedial works to existing…
23/05733/LBC
2023 Approved
Replacement of lower ground floor windows with matching units.
23/05732/FULL
2019 Approved
Repair and refurbishment of the front facade at ground floor level (fronting onto Queen A…
19/01640/LBC
Within ~100m

Nearby activity

2025 Withdrawn
4 Mansfield Mews London W1G 9NL
Partial removal of existing roof to create new roof terrace, accessible via a new stair w…
25/05099/FULL
2025 Withdrawn
4 Mansfield Mews London W1G 9NL
Partial removal of existing roof to create new roof terrace, accessible via a new stair w…
25/05100/LBC
2025
2 Mansfield Mews London W1G 9NL
Replacement of existing glass roof finish with a zinc covering.
25/06964/FULL
2025 Refused
30 Queen Anne Street London W1G 8HX
Erection of an infill extension at basement and ground floor level, Installation of a new…
25/05505/FULL
2025
43 - 49 Harley Street London W1G 8BT
Installation of support beam to facilitate failing beam at ground floor level (45 Harley…
25/06693/LBC
2025
14 Wigmore Place London W1U 2LX
Replacement of front entrance door; installation of insulation to external walls; removal…
25/06648/LBC
2025
14 Wigmore Place London W1U 2LX
Replacement of front entrance door; installation of slim line glazing to existing windows…
25/06647/FULL
2025
29 Queen Anne Street London W1G 9HU
Replacement of a window on the rear elevation with a new access door; reinforcements and…
25/04706/LBC
2025
29 Queen Anne Street London W1G 9HU
Replacement of a window on the rear elevation with a new access door; reinforcements and…
25/04705/FULL
2025 Approved
43 - 49 Harley Street London W1G 8BT
Repositioning of four air conditioning condenser units in the inner light-well and at the…
25/01884/FULL
2025
13 Wigmore Place London W1U 2LX
Installation of ASHP at lower ground floor courtyard (retrospective). (Linked with 25/030…
25/03024/LBC
2025
13 Wigmore Place London W1U 2LX
Installation of ASHP at lower ground floor courtyard (retrospective). (Linked with 25/030…
25/03023/FULL
2025
57 Harley Street London W1G 8QS
Relocation of the residential (Class C3) space from the part ground and basement floors t…
25/02646/FULL
2025
29 Queen Anne Street London W1G 9HU
Removal of condition 1 of planning permission dated 3rd July 1996 (RN:90/06471/FULL) for…
25/01562/FULL
2024
9 Mansfield Street London W1G 9NZ
Limited demolition, strip out and investigative works to 9 Mansfield Street and 6 Mansfie…
24/09052/LBC
2024
Queen Anne Street London
Establishment of a Heritage Partnership Agreement for works undertaken by or on behalf of…
25/00004/LBHPA
2024
40 Harley Street London W1G 9PP
Installation of plant to roof within two acoustic enclosures, with associated pipework to…
24/07276/FULL
2024
Harmont House 20 Harley Street London W1G 9PH
Change of use from Class D1/ Class E to (Class C3) (Flat 6)
24/06514/FULL
2024
22 Wimpole Street London W1G 8GP
Installation of one air conditioning unit to rear lightwell
24/06157/FULL
2024 Approved
9 Mansfield Street London W1G 9NZ
Removal of High Risk ACM's ( Asbestos Containing Materials ) that have been identified wi…
24/04574/LBC
2021 Approved
21 Harley Street London W1G 9QL
Variation of Condition 1 of planning permission dated 05 June 2020 (RN: 19/08751/FULL) fo…
21/00511/FULL
2021 Approved
21 Harley Street London W1G 9QL
Variation of Condition 1 of listed building consent dated 05 June 2020 (RN: 19/08752/LBC)…
21/00510/LBC
2021 Approved
43-49 Harley Street London W1G 8BT
Display of non-illuminated Pride flag measuring 2.0m x 1.0m for a temporary period from 4…
21/03957/ADV
2021 Approved
43-49 Harley Street London W1G 8BT
Display of non-illuminated Pride flag measuring 2.0m x 1.0m for a temporary period from 1…
21/03958/ADV
2021 Approved
21 Harley Street London W1G 9QL
Strengthening works to first floor.
21/01379/LBC
Westminster
Planning Authority Score
3.5/10
Below average
#221 of 296 councils
Relevant to this application:
Householder decisions

Westminster is slower than most councils at deciding householder applications, ranking #258 out of 296. Only 28% of applications have the time limit extended, well below the 41% national average - the council usually decides on time. Westminster is also one of the strictest councils - it refuses more householder applications than almost any other, with only 81% approved vs 90% nationally.

One of the strictest councils
only 81% approved vs 90% nationally
These figures are council-wide context, not a prediction for this application. View full council performance
Westminster decision statistics
Based on MHCLG data, the year to March 2026
86%
Overall approval rate
Below avg (87%) #201 of 296
81%
Householder approved
Below avg (90%) #277 of 296
44%
Decided in 8 weeks
Below avg (63%) #258 of 296
28%
Extended time limit
Below avg (41%) #46 of 296
83%
Minor dwellings approved
12 decided (1-9 homes)
67%
Major dwellings approved
3 decided (10+ homes)
81%
Change of use approved
133 decided
4,602
Total decisions
648 refused in the year to March 2026
Source: MHCLG planning statistics · See full council rankings

Energy performance: Energy performance certificates from the Energy Performance of Buildings Register, Ministry of Housing, Communities and Local Government. Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright 2026.