15A Devonshire Terrace London W2 3DW Data via plota.co.uk

26/03576/FULL - Full Planning Permission Application Approved
Extensions & alterationsListed buildings

Proposal

Erection of an infill extension to basement courtyard to form new bedroom and internal alterations. (Linked with 26/03577/LBC) Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
1 Jun 2026
✓
Validated
17 Jul 2026
✓
Approved
11 Sept 2026

Approved on 11 Sept 2026 · Delegated Decision · Last checked 25 Sept 2026

Documents 30

Decision & officer reports 2

PDF GRANT OF FULL PP [PE] Decision Notice · 10 Sept 2026 View ↗ PDF DELEGATED REPORT Report · 10 Sept 2026 View ↗

Statements & assessments 3

PDF HERITAGE STATEMENT Design and Access Statement · 17 Jul 2026 View ↗ PDF FLOOD RISK ASSESSMENT Background Papers · 17 Jul 2026 View ↗ PDF HERITAGE STATEMENT Design and Access Statement · 1 Jun 2026 View ↗

Plans & drawings 12

PDF PROPOSED BASEMENT AND GROUND FLOOR PLANS Drawing · 17 Jul 2026 View ↗ PDF PROPOSED SECTIONS A AND B Drawing · 17 Jul 2026 View ↗ PDF PROPOSED SW AND NE ELEVATIONS 01 AND 02 Drawing · 17 Jul 2026 View ↗ PDF LOCATION PLAN Location Plan · 1 Jun 2026 View ↗ PDF EXISTING SITE PLAN Drawing · 1 Jun 2026 View ↗ PDF EXISTING BASEMENT AND GROUND FLOOR PLANS Drawing · 1 Jun 2026 View ↗ PDF EXISTING SECTION A Drawing · 1 Jun 2026 View ↗ PDF EXISTING SW AND NE ELEVATIONS 01 AND 02 Drawing · 1 Jun 2026 View ↗ PDF PROPOSED SITE PLAN Drawing · 1 Jun 2026 View ↗ PDF PROPOSED BASEMENT AND GROUND FLOOR PLANS Drawing · 1 Jun 2026 View ↗ PDF PROPOSED SECTIONS A AND B Drawing · 1 Jun 2026 View ↗ PDF PROPOSED SW AND NE ELEVATIONS 01 AND 02 Drawing · 1 Jun 2026 View ↗

Application forms 1

PDF APPLICATIONFORMREDACTED Application Form · 1 Jun 2026 View ↗

Consultation & comments 4

PDF LLFA Consultee Comment · 27 Jul 2026 View ↗ PDF NEIGHBOUR NOTIFICATION LETTER (21D) Background Papers · 23 Jul 2026 View ↗ PDF INVALID CHASER LETTER (14 DAY RESPONSE) Background Papers · 14 Jul 2026 View ↗ PDF INVALID CHASER LETTER (14 DAY RESPONSE) Background Papers · 19 Jun 2026 View ↗

Other documents 8

PDF ECNSLT-INTERNAL CONSULTS Background Papers · 24 Jul 2026 View ↗ PDF ACK-GENERAL LETTER (G/P/C) Background Papers · 23 Jul 2026 View ↗ PDF CNSLT-LA SOCIETY Background Papers · 23 Jul 2026 View ↗ PDF ECNSLT-INTERNAL CONSULTS Background Papers · 23 Jul 2026 View ↗ PDF SITE NOTICE 21 OR 28 DAYS IF T&C APPL. Background Papers · 23 Jul 2026 View ↗ PDF 2ND INVALID LETTER Background Papers · 17 Jun 2026 View ↗ PDF RECEIPT OF APPLICATION Other · 2 Jun 2026 View ↗ PDF 1ST INVALID LETTER Background Papers · 2 Jun 2026 View ↗

All documents on the council site ↗

Associated applications 2

Site constraints 8

Grade II listed: 1-19, Devonshire Terrace W1
List entry 1290413 · The pin is inside its outline · 35 more listed buildings within 150 m (35 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 35 with distances
Historic England ↗
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 ↗
Also on the record
Inside the City of Westminster built-up area; Public transport access: PTAL 6b (excellent), TfL 2023, for the 100 m square; National infrastructure project 1094 m away: London Strategic Heat Main Project, at pre-application; Tree preservation order 26 m away: P15_A3.
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 4

Last sold for £750,000 in June 2021. Flat or maisonette, leasehold.

11 June 2021£750,000
20 October 2006£435,000
22 December 2005£320,000
7 February 2005£245,000

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

Building

Floor area72 m² (775 sq ft)
Energy ratingC (72 out of 100)
PropertyMid-terrace flat, 3 habitable rooms
BuiltBefore 1900
HeatingBoiler and radiators, mains gas
WallsSolid brick, as built, no insulation (assumed)

From the energy performance certificate lodged in November 2020, 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 3DW
Received
1 Jun 2026
Validated
17 Jul 2026
Ward
Lancaster Gate
Case officer
Show
Target decision
11 Sept 2026
Decision
Application Permitted
Decision date
11 Sept 2026
Decision level
Delegated Decision
Applicant
Show
Agent
Mistry Wills Design

How this decision compares

Decided in 56 days from validation, about the council's usual 55 days. Approved, as 88% 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

1comment received
1 objecting

16 neighbours consulted · Last counted 25 Sept 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-14928858
Planning Portal ref
PP-14928858
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
Open Space (east) Queen's Gardens London W2 3BA
1868 - Common lime - Reduce canopy by c. 3m to c. 16m x 4m to alleviate biomechanical str…
25/08339/TCA
2025
Basement Flat 68 Gloucester Terrace London W2 3HH
Installation of an internal ensuite shower room and utility cupboard within the existing…
25/08057/LBC
2025 Approved
3 Queen's Gardens London W2 3BA
Removal of uPVC doors, replacement with timber sash window and rendered wall to match exi…
25/06262/LBC
2025 Approved
Flat 1 17 Devonshire Terrace London W2 3DW
Internal cleaning and repairs to address water damage to affected walls and floors includ…
25/05958/CLLB
2025 Approved
3 Queen's Gardens London W2 3BA
Removal and relocation of existing plant from lightwell to a new acoustic enclosure on th…
25/04650/LBC
2025 Approved
3 Queen's Gardens London W2 3BA
Removal and relocation of existing plant from lightwell to a new acoustic enclosure on th…
25/04649/FULL
2025 Refused
Basement And Ground Floor 30 Chilworth Street London W2 6DT
Creation of a new lightwell to front forecourt; installation of a new stair, railings, do…
25/03707/LBC
2025 Approved
3 Devonshire Terrace London W2 3DN
Replacement of two external doors at lower ground floor level. (Linked with 25/03355/LBC)
25/03354/FULL
2025 Approved
3 Devonshire Terrace London W2 3DN
Replacement of two external doors at lower ground floor level. (Linked with 25/03354/FULL)
25/03355/LBC
2025 Approved
3 Queen's Gardens Bayswater London W2 3BA
Replacement of two external doors and associated window at lower ground floor level. (Lin…
25/03373/LBC
2025 Approved
3 Queen's Gardens Bayswater London W2 3BA
Replacement of two external doors and associated window at lower ground floor level. (Lin…
25/03372/FULL
2025 Approved
1 Devonshire Terrace London W2 3DN
Replacement of one external door at lower ground floor level. (25/03349/FULL)
25/03350/LBC
2025 Approved
1 Devonshire Terrace London W2 3DN
Replacement of one external door at lower ground floor level. (25/03350/LBC)
25/03349/FULL
2025 Approved
24 Chilworth Street London W2 6DT
Conversion of property into 5 residential units (Class C3); Erection of conservatory at l…
25/01848/LBC
2025 Approved
24 Chilworth Street London W2 6DT
Conversion of existing dwelling into 5 residential units (Class C3), erection of conserva…
25/01847/FULL
2025 Refused
2 Gloucester Mews West London W2 6DY
Variation of condition 1 of planning permission dated 7th June 2024 (RN:23/08046/FULL) fo…
25/02805/FULL
2025
23 Devonshire Terrace London W2 3DP
Lowering of floor slab to the existing under croft vaults, installation of a waterproofin…
25/03601/LBC
2025
Flat 1 4 Cleveland Square London W2 6DH
Internal alterations.
25/02164/LBC
2025
96 Gloucester Mews West London W2 6DY
Installation of solar panels to the front roof pitch.
25/00072/CLOPUD
2024
66 Gloucester Terrace London W2 3HH
Installation of replacement single-glazed timber windows with OKNow vacuum-glazing to fro…
24/08360/LBC
2020 Approved
63 Queen's Gardens Bayswater London W2 3AH
Conversion of building to six flats, internal layout re-arrangement and re-organisation o…
20/03443/FULL
2021
19 Upbrook Mews London W2 3HG
Excavation of single storey basement beneath footprint of original dwelling, conversion o…
21/00155/FULL
2020 Approved
Flat B 4 Cleveland Square London W2 6DH
Installation of three traditional timber framed single glazed sash windows to rear elevat…
20/07304/LBC
2020 Approved
Flat B 4 Cleveland Square London W2 6DH
Installation of three traditional timber framed single glazed sash windows to rear elevat…
20/07303/FULL
2020 Approved
Crastock Court Queen's Gardens Bayswater London W2 3BG
Installation of replacement windows and doors on front elevation from first to fifth floo…
20/07224/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.