Second Floor Flat 163 Portnall Road London W9 3BN Data via plota.co.uk

25/09036/FULL - Full Planning Permission Application Approved
Extensions & alterations

Proposal

Replacement of existing rear terrace conservatory, erection of rear loft dormer, and metal balustrade to existing roof terrace. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
12 Dec 2025
✓
Validated
20 Jan 2026
✓
Approved
26 Aug 2026

Approved on 26 Aug 2026 · Delegated Decision · Last checked 26 Sept 2026

Documents 31

Decision & officer reports 2

PDF GRANT OF FULL PP [PE] Decision Notice · 26 Aug 2026 View ↗ PDF DELEGATED REPORT Report · 26 Aug 2026 View ↗

Statements & assessments 1

PDF DESIGN AND ACCESS STATEMENT Design and Access Statement · 12 Dec 2025 View ↗

Plans & drawings 21

PDF PROP ROOF PLAN_ Drawing · 18 Aug 2026 View ↗ PDF PROP REAR ELEVATION_A Drawing · 18 Aug 2026 View ↗ PDF PROP SIDE ELEVATION_A Drawing · 18 Aug 2026 View ↗ PDF LOCATION PLAN Location Plan · 12 Dec 2025 View ↗ PDF BLOCK PLAN Drawing · 12 Dec 2025 View ↗ PDF EXISTING GROUND FLOOR PLAN Drawing · 12 Dec 2025 View ↗ PDF EXISTING FIRST FLOOR PLAN Drawing · 12 Dec 2025 View ↗ PDF EXISTING SECOND FLOOR PLAN Drawing · 12 Dec 2025 View ↗ PDF EXISTING LOFT PLAN Drawing · 12 Dec 2025 View ↗ PDF EXISTING ROOF PLAN Drawing · 12 Dec 2025 View ↗ PDF EXISTING FRONT & REAR ELEVATION Drawing · 12 Dec 2025 View ↗ PDF EXISTING SIDE ELEVATION Drawing · 12 Dec 2025 View ↗ PDF EXISTING LONG SECTION Drawing · 12 Dec 2025 View ↗ PDF PROPOSED GROUND FLOOR PLAN Drawing · 12 Dec 2025 View ↗ PDF PROPOSED FIRST FLOOR PLAN Drawing · 12 Dec 2025 View ↗ PDF PROPOSED SECOND FLOOR PLAN Drawing · 12 Dec 2025 View ↗ PDF PROPOSED LOFT PLAN Drawing · 12 Dec 2025 View ↗ PDF PROPOSED ROOF PLAN Superseded document · 12 Dec 2025 View ↗ PDF PROPOSED FRONT & REAR ELEVATION Drawing · 12 Dec 2025 View ↗ PDF PROPOSED SIDE ELEVATION Superseded document · 12 Dec 2025 View ↗ PDF PROPOSED LONG SECTION Drawing · 12 Dec 2025 View ↗

Application forms 1

PDF APPLICATIONFORMREDACTED Application Form · 12 Dec 2025 View ↗

Consultation & comments 1

PDF NEIGHBOUR NOTIFICATION LETTER (21D) Background Papers · 18 Feb 2026 View ↗

Other documents 5

PDF CNSLT-LA SOCIETY Background Papers · 18 Feb 2026 View ↗ PDF ECNSLT-LOCAL AMENITY SOCIETY Background Papers · 18 Feb 2026 View ↗ PDF SITE NOTICE 21 OR 28 DAYS IF T&C APPL. Background Papers · 18 Feb 2026 View ↗ PDF ACK-GENERAL LETTER (G/P/C) Background Papers · 18 Feb 2026 View ↗ PDF RECEIPT OF APPLICATION Other · 14 Feb 2026 View ↗

All documents on the council site ↗

Associated applications 2

Site constraints 3

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.
Not affected
Outside flood zones 2 and 3 · Not green belt · No listed building at the site

Checked on 26 September 2026. Historic England, the Environment Agency, Natural England 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.

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Other new applications on this street

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Important details

Council
Westminster
Application type
Full Planning Permission Application
Postcode
W9 3BN
Received
12 Dec 2025
Validated
20 Jan 2026
Ward
Queen's Park
Case officer
Show
Target decision
26 Aug 2026
Decision
Application Permitted
Decision date
26 Aug 2026
Decision level
Delegated Decision
Applicant
Show
Agent
Office Ten Architecture

How this decision compares

Decided in 218 days from validation, 163 days slower than Westminster's median of 55 for extensions. Approved, as 88% of extensions here are.

56%decided within 8 weeks
88%approved
1,672decided in the last year

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

Public comments

No public comments yet.

45 neighbours consulted · Last counted 26 Sept 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-14562011
Comments by
18 Mar 2026
Site or press notice
25 Feb 2026
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
186 Ashmore Road London W9 3DE
Single-storey infill extension, rear dormer extension with front roof lights and the conv…
25/07635/FULL
2025
Ground Floor Flat 162 Fernhead Road London W9 3EL
Erection of a single-storey ground floor rear extension.
25/07360/FULL
2025 Refused
135 Portnall Road London W9 3BN
Construction of a full-width rear dormer extension to provide additional habitable accomm…
25/04742/FULL
2025 Approved
135 Portnall Road London W9 3BN
Replacement of all existing windows and selected doors with new slimline uPVC sash and ca…
25/04743/FULL
2023 Approved
145A Bravington Road London W9 3AT
Ground floor rear infill extension.
23/08443/FULL
2023 Approved
Top Floor 125 Ashmore Road London W9 3DA
Installation of rear dormer and rooflights.
23/08810/FULL
2023
Second Floor Flat 161 Portnall Road London W9 3BN
Erection of rear dormer and installation of rooflight to front roofslope.
23/07354/FULL
2023
148 Ashmore Road London W9 3DE
Formation of dormer window to the rear roof slope at 2nd floor level and two roof light t…
23/04829/FULL
2023 Approved
Top Floor Flat 111 Bravington Road London W9 3AS
Erection of dormer to rear, extension of roof to accommodate stairs to loft to rear, form…
23/00151/FULL
2022 Approved
Flat 1 138 Portnall Road London W9 3BQ
Enlargement to existing window opening to allow for double glazed French patio doors on r…
22/05384/FULL
2022 Approved
Second Floor 107 Bravington Road London W9 3AS
Erection of rear dormer, formation of rooflights to front and enlargement of second floor…
22/02968/FULL
2022 Approved
Flat 3 156 Ashmore Road London W9 3DE
Installation of window with obscure glass to side of rear closet wing at first floor leve…
22/01936/FULL
2021 Refused
Flat 3 118 Bravington Road London W9 3AL
Construction of a dormer extension in the rear roof slope with the insertion of 3 rooflig…
21/06667/FULL
2021 Withdrawn
Ground Floor Flat 151 Portnall Road London W9 3BN
Erection of a single storey wraparound extension at ground floor, layout alterations, and…
21/05478/FULL
2020 Withdrawn
143B Portnall Road London W9 3BN
Installation of railings to existing first floor roof terrace.
20/03459/FULL
2020 Approved
143C Portnall Road London W9 3BN
Installation of railings to existing third floor roof terrace, replacement of windows and…
20/03460/FULL
2020 Approved
Flat 2 166 Portnall Road London W9 3BQ
Installation of metal railing to rear first floor flat roof in connection with use as a t…
20/03457/FULL
2021
114 Bravington Road London W9 3AL
Erection of a single story site extension.
21/05103/FULL
2020 Approved
Ground Floor Flat 175 Portnall Road London W9 3BN
Erection of a single storey rear infill extension at ground floor level.
20/08348/FULL
2020 Approved
Flat 1 166 Portnall Road London W9 3BQ
Erection of a single storey rear extension at ground floor level.
20/03456/FULL
2016 Refused
172-174 Fernhead Road London W9 3EL
Erection of rear mansard roof extensions with dormers to rear roofslope and rooflights to…
16/03368/FULL
2016 Approved
122 Bravington Road London W9 3AL
Replacement of windows and doors
16/06278/FULL
2016 Approved
168 Ashmore Road London W9 3DE
Use of first and second floors as two flats, construction of a rear roof extension, insta…
16/05242/FULL
2016 Approved
182 Ashmore Road London W9 3DE
Erection of dormer roof extension to rear roofslope with solar panels to roof of dormer a…
16/04352/FULL
2016 Refused
182 Ashmore Road London W9 3DE
Erection of a rear dormer roof extension in association with extending 2nd floor flat and…
16/00976/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

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