26 Upper Montagu Street London W1H 1RP Data via plota.co.uk

26/03214/FULL - Full Planning Permission Application Approved
Change of useDemolitionExtensions & alterations

Proposal

Erection of a one and a half storey rear extension to enlarge HMO, installation of replacement windows and installation of balcony railings. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
15 May 2026
✓
Consultation
26 May 2026
✓
Approved
18 Sept 2026

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

Documents 21

Decision & officer reports 2

PDF 26 UPPER MONTAGU ST DECISION NOTICE 26/03214/FULL PLANNING PERMISSION DATED 18 Decision Notice · 18 Sept 2026 View ↗ PDF DELEGATED REPORT Report · 3 Jul 2026 View ↗

Statements & assessments 4

PDF DESIGN & ACCESS STATEMENT Design and Access Statement · 18 May 2026 View ↗ PDF SUSTAINABILITY STATEMENT Background Papers · 15 May 2026 View ↗ PDF COVERING LETTER WITH PLANNING STATEMENT 2026.05.13 Background Papers · 15 May 2026 View ↗ PDF HERITAGE IMPACT ASSESSMENT Heritage Statement · 15 May 2026 View ↗

Plans & drawings 3

PDF DRAWING PACKAGE UPDATED Drawing · 7 Jul 2026 View ↗ PDF SITE LOCATION PLAN Drawing · 15 May 2026 View ↗ PDF PLANNING DRAWINGS Drawing · 15 May 2026 View ↗

Application forms 2

PDF APPLICATIONFORMREDACTED Application Form · 15 May 2026 View ↗ PDF FEECALCULATION Background Papers · 15 May 2026 View ↗

Consultation & comments 1

PDF NEIGHBOUR NOTIFICATION LETTER (21D) Background Papers · 26 May 2026 View ↗

Other documents 9

PDF 26 UPPER MONTAGU ST 260910_UU FINAL ENGROSSMENT COMPLETED 18 SEPTEMBER 2026 Legal Agreement · 18 Sept 2026 View ↗ PDF ACK-GENERAL LETTER (G/P/C) Background Papers · 26 May 2026 View ↗ PDF CNSLT-LA SOCIETY Background Papers · 26 May 2026 View ↗ PDF SITE NOTICE 21 OR 28 DAYS IF T&C APPL. Background Papers · 26 May 2026 View ↗ PDF UPDATED FIRE STRATEGY Other · 26 May 2026 View ↗ PDF RECEIPT OF APPLICATION Other · 21 May 2026 View ↗ PDF ATTACHMENTSUMMARY Background Papers · 15 May 2026 View ↗ PDF DAYLIGHT REPORT Background Papers · 15 May 2026 View ↗ PDF FIRE SAFETY STRATEGY Background Papers · 15 May 2026 View ↗

All documents on the council site ↗

Site constraints 6

Grade II listed: 28, Upper Montagu Street W1
List entry 1066198 · 9 m away · 65 more listed buildings within 150 m (1 Grade I, 64 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 65 with distances
Historic England ↗
Portman Estate 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
Inside the City of Westminster built-up area.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 11 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.

Sales history 1

Last sold for £2,285,000 in August 2025. Other property, freehold.

26 August 2025£2,285,000Recorded as a transfer outside a standard sale

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

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Other new applications on this street

21 Sept 2026Pending

51 Upper Montagu Street London W1H 1FQ

Details of Desktop study and Site investigation reports pursuant to partial disc...

26/06443/ADFULL
17 Sept 2026Pending

Flat 4 8 Upper Montagu Street London W1H 2PB

Replacement of an existing timber single-glazed sash windows with a timber sliml...

26/06369/LBC
21 Jul 2026Pending

Flat 1 8 Upper Montagu Street London W1H 2PB

Replacement of existing windows with timber slimline double-glazed windows, incl...

26/04890/LBC
4 Dec 2025Approved

21 Montagu Street London W1H 7EX

Installation of new external vent and timber louvred door in lightwell (21-22 Mo...

25/08812/FULL

Nearby new applications

17 Sept 2026Pending

Flat 4 8 Upper Montagu Street London W1H 2PB

Replacement of an existing timber single-glazed sash windows with a timber sliml...

26/06369/LBC
17 Sept 2026Pending

Flat 4 8 Upper Montagu Street London W1H 2PB

Replacement of an existing timber single-glazed sash windows with a timber sliml...

26/06370/FULL
18 Sept 2026Pending

134 George Street London W1H 5DN

Details of manufacturers specifications of the facing materials you will use, in...

26/06427/ADFULL
11 Aug 2026Pending

214 Edgware Road London W2 1DH

Replacement of existing and rear elevation windows with UPVC windows.

26/05444/FULL
28 Sept 2026Pending

15 - 17 Blandford Street London W1U 3DG

Installation of an acoustic silencer to the existing kitchen extract duct at roo...

26/06630/FULL
11 Sept 2026Pending

1 Wyndham Yard London W1H 2QF

Proposed reconfiguration of existing front door and adjacent garage door with th...

26/06259/FULL

Important details

Council
Westminster
Application type
Full Planning Permission Application
Postcode
W1H 1RP
Received
15 May 2026
Validated
15 May 2026
Ward
Marylebone
Case officer
Show
Target decision
18 Sept 2026
Decision
Application Permitted
Decision date
18 Sept 2026
Decision level
Delegated Decision
Applicant
Show
Agent
Logic Planning

How this decision compares

Decided in 126 days from validation, 69 days slower than Westminster's median of 57 for changes of use. Approved, as 83% of changes of use here are.

48%decided within 8 weeks
83%approved
163decided in the last year

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

Public comments

No public comments yet.

19 neighbours consulted · Last counted 19 Sept 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-14932534
Comments by
24 Jun 2026
Site or press notice
26 May 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
25 Upper Montagu Street London W1H 1SA
Replacement of existing external staircase within front lightwell. (Linked to 25/07358/FU…
25/08299/LBC
2025
21 Upper Montagu Street London W1H 2PQ
Replacement of existing non-original single-glazed timber sash windows with new slimline…
25/08056/LBC
2025
21 Upper Montagu Street London W1H 2PQ
Replacement of single-glazed timber sash windows with slimline double-glazed timber sash…
25/08055/FULL
2025 Approved
Flat 4 York House 39 Upper Montagu Street London W1H 1FR
Installation of double glazed steel casement windows within the retained existing timber…
25/03577/FULL
2025 Withdrawn
21 Upper Montagu Street London W1H 2PQ
Careful dismantling and rebuilding of bowed flank elevation in matching/reused brickwork…
25/06221/LBC
2025 Withdrawn
21 Upper Montagu Street London W1H 2PQ
Careful dismantling and rebuilding of bowed flank elevation in matching/reused brickwork…
25/06220/FULL
2025
25 Upper Montagu Street London W1H 1SA
Replacement of existing external staircase within front lightwell. (Linked to 25/08299/LB…
25/07358/FULL
2025 Approved
105A Crawford Street London W1H 2HU
Regulation 5 Notice of Intention to Install Fixed Line Broadband Apparatus to a Listed Bu…
25/07009/TELNOT
2025 Approved
Flat 10 Bryanston Mansions York Street London W1H 1DA
Replacement windows to the front and rear elevations of Flat 10.
25/04421/FULL
2025
Flat 19 York House 39 Upper Montagu Street London W1H 1FR
Installation of double glazed steel casement windows within the retained existing timber…
25/06040/FULL
2025 Approved
Flat 11 99 Gloucester Place London W1U 6JL
Installation of bio-bidet on the existing WC at second floor level.
25/04214/LBC
2025 Approved
101 Crawford Street London W1H 2HP
Replacement of existing single-glazed sash windows on the front (north-west) and rear (so…
25/04257/FULL
2025
14 Upper Montagu Street London W1H 2PD
Installation of an ASHP in the rear courtyard and minor internal alterations to the build…
25/04687/LBC
2025
14 Upper Montagu Street London W1H 2PD
Installation of an ASHP in the rear courtyard and installation of slimiline double glazed…
25/04686/FULL
2025
111 Gloucester Place London W1U 6JP
Repair and retile concrete front entrance steps. (Linked with 25/00175/FULL)
25/00176/LBC
2025
111 Gloucester Place London W1U 6JP
Alterations to the front entrance steps and entrance flooring. (Linked with 25/00176/LBC)
25/00175/FULL
2024
119 Gloucester Place London W1U 6JX
Installation of self-standing kitchenettes to hotel rooms and minor internal alterations…
24/08905/LBC
2024
13 Salisbury Place London W1H 1FJ
Alterations to the front facade and in the courtyard including replacement first floor do…
24/06169/FULL
2024
62 Upper Montagu Street London W1H 1SW
Installation of lighweight plasterboard and glass partition.
24/05263/LBC
2024
52 Upper Montagu Street London W1H 1SJ
Creation of a new external stair in the front lightwell and associated works. (Linked wit…
24/05218/FULL
2018 Approved
12 Upper Montagu Street London W1H 2PB
Enlargement and replacement of a rear window with single glazed sash window at lower grou…
18/09902/LBC
2018 Approved
12 Upper Montagu Street London W1H 2PB
Enlargement and replacement of a rear window with single glazed sash window at lower grou…
18/09901/FULL
2018 Approved
12 Upper Montagu Street W1H 2PB
Soft strip works to facilitate investigation.
18/08073/LBC
2018 Approved
44 York Street London W1H 1FN
Erection of single storey rear extension at lower ground floor and associated and externa…
18/03352/FULL
2018 Approved
44 York Street London W1H 1FN
Erection of single storey rear extension at lower ground floor, internal alterations thro…
18/03353/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

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