21 Conduit Mews London W2 3RE Data via plota.co.uk

25/06778/FULL - Full Planning Permission Application Refused
Extensions & alterations

Proposal

Erection of a dormer to the rear elevation. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
22 Sept 2025
✓
Validated
30 Sept 2025
✗
Refused
17 Feb 2026
Appeal
Not lodged

Refused on 17 Feb 2026 · Complex Delegated Decision · Last checked 19 Oct 2026

Documents 23

Decision & officer reports 2

PDF REFUSAL-FULL PP [PE] Decision Notice · 17 Feb 2026 View ↗ PDF DELEGATED REPORT Report · 17 Feb 2026 View ↗

Statements & assessments 2

PDF SUSTAINABLE DESIGN STATEMENT Background Papers · 30 Sept 2025 View ↗ PDF HERITAGE DESIGN AND ACCESS STATEMENT Design and Access Statement · 22 Sept 2025 View ↗

Plans & drawings 4

PDF DRAWING ISSUE SHEET Other · 18 Dec 2025 View ↗ PDF EXISTING DRAWINGS Drawing · 18 Dec 2025 View ↗ PDF PROPOSED DRAWINGS Drawing · 18 Dec 2025 View ↗ PDF DRAWING ISSUE SHEET Background Papers · 6 Oct 2025 View ↗

Application forms 2

PDF APPLICATIONFORMREDACTED Application Form · 22 Sept 2025 View ↗ PDF FEECALCULATION Background Papers · 22 Sept 2025 View ↗

Consultation & comments 4

PDF OBJECTION Public Comment · 1 Dec 2025 View ↗ PDF OBJECTION Public Comment · 25 Nov 2025 View ↗ PDF OBJECTION Public Comment · 29 Oct 2025 View ↗ PDF NEIGHBOUR NOTIFICATION LETTER (21D) Background Papers · 6 Oct 2025 View ↗

Other documents 9

PDF SITE NOTICE 21 OR 28 DAYS IF T&C APPL. Background Papers · 6 Oct 2025 View ↗ PDF CNSLT-LA SOCIETY Background Papers · 6 Oct 2025 View ↗ PDF ACK-GENERAL LETTER (G/P/C) Background Papers · 6 Oct 2025 View ↗ PDF 4018-25-101 REV C PROPOSED DETAILS Superseded document · 6 Oct 2025 View ↗ PDF RECEIPT OF APPLICATION Other · 25 Sept 2025 View ↗ PDF 1ST INVALID LETTER Background Papers · 25 Sept 2025 View ↗ PDF ATTACHMENTSUMMARY Background Papers · 22 Sept 2025 View ↗ PDF PROPOSED DETAILS Superseded document · 22 Sept 2025 View ↗ PDF EXISTING DETAILS Superseded document · 22 Sept 2025 View ↗

All documents on the council site ↗

Site constraints 9

Bayswater 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 ↗
Article 4 direction
Article 4 Basement Development Permitted Rights Removed. 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 ↗
29 listed buildings within 150 m
Nearest: 196B AND C, CRAVEN ROAD W2 (See details for further address information), Grade II, 3 m away · 1 Grade II*, 28 Grade II
The site itself is not listed. 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 all 29 with distances
Historic England ↗
Habitat network: Network Enhancement Zone 2
Where habitat is joined up enough to work as a network. Context, not a constraint on its own.
Also on the record
National infrastructure project 803 m away: London Strategic Heat Main Project, at pre-application; Inside the City of Westminster built-up area; Public transport access: PTAL 6b (excellent), TfL 2023, for the 100 m square; Town centre 41 m away: Praed Street/ Paddington.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 2 November 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.

Sales history 1

Last sold for £605,000 in May 2025. Flat or maisonette, leasehold.

29 May 2025£605,000Recorded as a transfer outside a standard sale

Sale prices from HM Land Registry's price paid record, matched to this application by its address.

Building

Floor area75 m² (807 sq ft)
Energy ratingE (41 out of 100), could reach D
PropertyMid-terrace maisonette, 3 habitable rooms
BuiltBefore 1900
HeatingBoiler and radiators, mains gas
WallsSolid brick, as built, no insulation (assumed)

From the energy performance certificate lodged in March 2025, 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
W2 3RE
Received
22 Sept 2025
Validated
30 Sept 2025
Ward
Lancaster Gate
Case officer
Show
Target decision
25 Nov 2025
Decision
Application Refused
Decision date
17 Feb 2026
Decision level
Complex Delegated Decision
Applicant
Show
Agent
sjd Architects Ltd

How this decision compares

Decided in 140 days from validation, 85 days slower than Westminster's median of 55 for extensions. Refused, as 12% of extensions here are.

56%decided within 8 weeks
88%approved
1,937decided in the last year

Plota live figures for extensions decided by Westminster in the last twelve months, from validation. Westminster decision record →

Public comments

5comments received
5 objecting

100% object · above the UK average of 74%

36 neighbours consulted · Last counted 19 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-14347588
Planning Portal ref
PP-14347588
Comments by
5 Nov 2025
Site or press notice
15 Oct 2025
Env. assessment
No

Historical activity at this location

25 nearby applications on record - archival context, not part of the live application.

Within ~100m

Nearby activity

2025
7 Talbot Square London W2 1TR
Replacement windows on front elevations to be replaced with timber framed sash windows wi…
25/07196/LBC
2025
7 Talbot Square London W2 1TR
Replacement windows on front elevations to be replaced with timber framed sash windows wi…
25/07195/FULL
2025 Approved
24 - 26 Spring Street London W2 1JA
Display of non-illuminated temporary hoarding measuring 2.4m x 1.2m, 2.4m x 15.9m, 2.4m x…
25/05218/ADV
2025
22 Spring Street London W2 1JA
Fascia sign - new ppc aluminium fascia sign with 3D aluminimum / acylic backlit signage l…
25/06383/COADV
2025
22 Spring Street London W2 1JA
Shopfront improvements including: - New painted hardwood shopfront, incl 1no main entranc…
25/06382/COFUL
2025 Refused
21A Conduit Mews London W2 3RE
Erection of dormers to front and rear elevations
25/04276/FULL
2025
Basement Flat 25 Westbourne Terrace London W2 3UN
Internal Alterations
25/03112/LBC
2025
Basement Flat 25 Westbourne Terrace London W2 3UN
Internal Alterations including retaining existing York stone stair.
25/03119/LBC
2025
24 - 26 Spring Street London W2 1JA
Display of internally illuminated fascia sign measuring 0.45m x 2.28m and an externally i…
25/02999/ADV
2025
24 - 26 Spring Street London W2 1JA
Replacement shopfront. (Linked with 25/02999/ADV)
25/02998/FULL
2025
Basement And Ground Floor 13 Spring Street London W2 3RA
Alterations to Shop Front, including shopfront signage & led strip lighting. (Linked with…
25/02644/LBC
2025
Basement And Ground Floor 13 Spring Street London W2 3RA
Alterations to shopfront. (Linked with 25/02644/LBC)
25/02643/FULL
2025 Refused
Flat B 25 Westbourne Terrace London W2 3UN
Internal alterations at lower ground floor, Flat B
25/01653/LBC
2025 Refused
Basement Flat 25 Westbourne Terrace London W2 3UN
Internal alterations including refurbishment and removal of staircase.
25/01836/LBC
2025
Flat 4 6 Spring Street London W2 3RA
Like for like replacement of two modern weathered and damaged windows at fourth floor lev…
25/01213/LBC
2025
24 - 26 Spring Street London W2 1JA
Creation of an external access ramp.
25/00489/FULL
2025
24 - 26 Spring Street London W2 1JA
Replacement shopfront and signage.
25/00486/FULL
2025
24 - 26 Spring Street London W2 1JA
Display of internally illuminated projecting sign measuring 0.805m X 0.6m (Linked to 25/0…
25/00487/ADV
2025
194 Sussex Gardens London W2 3UA
T4 London Plane of the MWA Arboricultural Report. Works: Reduce height from 26m to approx…
25/00376/TPO
2024
14 Spring Street London W2 3RA
Display of one externally illuminated fascia sign measuring 0.72m x 3.63m. Linked with 24…
24/08587/ADV
2018 Approved
34 Spring Street London W2 1JA
Installation of a new timber shopfront.
18/05228/FULL
2018 Approved
23 Spring Street London W2 1JA
Installation of replacement shopfront at ground floor level.
18/03984/FULL
2018 Approved
8A Spring Street London W2 3RA
Installation of fascia sign , hanging sign and internal alterations.
18/02433/LBC
2018 Withdrawn
Flat 4 15-17 Westbourne Terrace London W2 3UN
Removal of existing external door and replacement with timber frame window on side elevat…
18/01857/LBC
2018 Withdrawn
Flat 4 15-17 Westbourne Terrace London W2 3UN
Removal of existing external door and replacement with timber frame window on side elevat…
18/01850/FULL
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

Sale prices: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.

Freehold boundary: © Crown copyright and database rights 2026, HM Land Registry. Polygons © Crown copyright and database rights 2026 Ordnance Survey 100026316. Conditions of use

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.